Maximo List Archive

This is an archive of the Maximo Yahoo Community. The content of this pages may be a sometimes obsolete so please check post dates.
Thanks to the community owner Christopher Wanko for providing the content.



Websphere tuning on Maximo 7.5

From: Tommy H Sumarsono (2012-07-09 06:38)

Dear WebSphere Experts,
Our maximo 7.5 is running on ms sql server 2008 and IBM websphere. The performance is very good but sometimes we're facing the problem of out of memory.
The Websphere JVM has already been tuned, with initial heap size:1280 and maximum heap size: 1536 along with Generic JVM Arguments.
The thread pools are also been configured to smaller size than the default. We monitored through Performance Management Viewer but we still got no clues.
Do you have any suggestion to eliminate the Out of Memory to optimize the websphere?
Any suggestion & recommendation would be greatly appreciated.
Thank you so much.


From: Chris Lawless (2012-07-09 04:37)

Why is the heap so small? For 7.5 the recommended min and max is 4096.
Chris.
On Jul 8, 2012, at 11:38 PM, "Tommy H Sumarsono" <hediaka@yahoo.co.id> wrote:
> Dear WebSphere Experts,
>
> Our maximo 7.5 is running on ms sql server 2008 and IBM websphere. The performance is very good but sometimes we're facing the problem of out of memory.
>
> The Websphere JVM has already been tuned, with initial heap size:1280 and maximum heap size: 1536 along with Generic JVM Arguments.
> The thread pools are also been configured to smaller size than the default. We monitored through Performance Management Viewer but we still got no clues.
>
> Do you have any suggestion to eliminate the Out of Memory to optimize the websphere?
>
> Any suggestion & recommendation would be greatly appreciated.
>
> Thank you so much.
>
>


From: hediaka (2012-07-09 11:56)

Hi Chris,
Thank you for your suggestion. Yes, I need to increase the heap size more than 2 gigs, but somehow the MXServer can't be started if I change the initial and the max heap size more than 1.5gigs.
We're running on windows server 2003 32 bit Enterprise with 12gigs RAM.
Do you have any idea how to increase the heap size(min&max)?
Thank you so much
Regards,
Tommy Hediaka S.
-----Original Message-----
From: Chris Lawless <lawlessc@gmail.com>
Sender: MAXIMO@yahoogroups.com
Date: Mon, 9 Jul 2012 04:37:53
To: MAXIMO@yahoogroups.com<MAXIMO@yahoogroups.com>
Reply-To: MAXIMO@yahoogroups.com
Subject: Re: [MAXIMO List] Websphere tuning on Maximo 7.5
Why is the heap so small? For 7.5 the recommended min and max is 4096.
Chris.
On Jul 8, 2012, at 11:38 PM, "Tommy H Sumarsono" <hediaka@yahoo.co.id> wrote:
> Dear WebSphere Experts,
>
> Our maximo 7.5 is running on ms sql server 2008 and IBM websphere. The performance is very good but sometimes we're facing the problem of out of memory.
>
> The Websphere JVM has already been tuned, with initial heap size:1280 and maximum heap size: 1536 along with Generic JVM Arguments.
> The thread pools are also been configured to smaller size than the default. We monitored through Performance Management Viewer but we still got no clues.
>
> Do you have any suggestion to eliminate the Out of Memory to optimize the websphere?
>
> Any suggestion & recommendation would be greatly appreciated.
>
> Thank you so much.
>
>


From: Will Hampton (2012-07-09 14:54)

32 bit OS cannot address more than about 2.8 gigs without some form of extensions in use...
... why are you 32 bit on a machine with 12 gigs of RAM??
Is everything installed on the one machine? IF so you may be stepping on your server JVM memory space when you try to expand the JVM memory post installation.
R/
Will
From: MAXIMO@yahoogroups.com [mailto:MAXIMO@yahoogroups.com] On Behalf Of hediaka@yahoo.co.id
Sent: Monday, July 09, 2012 6:57 AM
To: maximo yahoogroups
Subject: Re: [MAXIMO List] Websphere tuning on Maximo 7.5
Hi Chris,
Thank you for your suggestion. Yes, I need to increase the heap size more than 2 gigs, but somehow the MXServer can't be started if I change the initial and the max heap size more than 1.5gigs.
We're running on windows server 2003 32 bit Enterprise with 12gigs RAM.
Do you have any idea how to increase the heap size(min&max)?
Thank you so much
Regards,
Tommy Hediaka S.
-----Original Message-----
From: Chris Lawless <lawlessc@gmail.com<mailto:lawlessc%40gmail.com>>
Sender: MAXIMO@yahoogroups.com<mailto:MAXIMO%40yahoogroups.com>
Date: Mon, 9 Jul 2012 04:37:53
To: MAXIMO@yahoogroups.com<mailto:MAXIMO%40yahoogroups.com><MAXIMO@yahoogroups.com<mailto:MAXIMO%40yahoogroups.com>>
Reply-To: MAXIMO@yahoogroups.com<mailto:MAXIMO%40yahoogroups.com>
Subject: Re: [MAXIMO List] Websphere tuning on Maximo 7.5
Why is the heap so small? For 7.5 the recommended min and max is 4096.
Chris.
On Jul 8, 2012, at 11:38 PM, "Tommy H Sumarsono" <hediaka@yahoo.co.id<mailto:hediaka%40yahoo.co.id>> wrote:
> Dear WebSphere Experts,
>
> Our maximo 7.5 is running on ms sql server 2008 and IBM websphere. The performance is very good but sometimes we're facing the problem of out of memory.
>
> The Websphere JVM has already been tuned, with initial heap size:1280 and maximum heap size: 1536 along with Generic JVM Arguments.
> The thread pools are also been configured to smaller size than the default. We monitored through Performance Management Viewer but we still got no clues.
>
> Do you have any suggestion to eliminate the Out of Memory to optimize the websphere?
>
> Any suggestion & recommendation would be greatly appreciated.
>
> Thank you so much.
>
>


From: pkroseman (2012-07-09 15:29)

Even though Windows Enterprise can see more than 4GB each 32-bit process can only use 2 GB total space (3 GB with the boot.ini switch enabled). The total space includes both the memory you see in task manager and hidden space as native memeory.
I had Out Of Memory issues with heap of 1536 when running on 32-bit also. I changed the max to 1280 and have not had any problems since.
Process Explorer can show total process size using the Virtual Size field.
I also highly recommend reading the IBM article Thanks for the Memory (http://www.ibm.com/developerworks/java/library/j-nativememory-linux/). It explains how the native space is used and how it relates to java.
If you have a lot of users (15+) using simultaneously, you may need to setup a second application server. You could do this on the same server and WebSphere if you aren't approaching your 12 GB yet. This will give you 2 processes, each with 2GB of space.
Hope you solve your issues.
--- In MAXIMO@yahoogroups.com, hediaka@... wrote:
>
> Hi Chris,
>
> Thank you for your suggestion. Yes, I need to increase the heap size more than 2 gigs, but somehow the MXServer can't be started if I change the initial and the max heap size more than 1.5gigs.
> We're running on windows server 2003 32 bit Enterprise with 12gigs RAM.
>
> Do you have any idea how to increase the heap size(min&max)?
>
> Thank you so much
>
>
>
> Regards,
>
> Tommy Hediaka S.
>
> -----Original Message-----
> From: Chris Lawless <lawlessc@...>
> Sender: MAXIMO@yahoogroups.com
> Date: Mon, 9 Jul 2012 04:37:53
> To: MAXIMO@yahoogroups.com<MAXIMO@yahoogroups.com>
> Reply-To: MAXIMO@yahoogroups.com
> Subject: Re: [MAXIMO List] Websphere tuning on Maximo 7.5
>
> Why is the heap so small? For 7.5 the recommended min and max is 4096.
>
> Chris.
>
> On Jul 8, 2012, at 11:38 PM, "Tommy H Sumarsono" <hediaka@...> wrote:
>
> > Dear WebSphere Experts,
> >
> > Our maximo 7.5 is running on ms sql server 2008 and IBM websphere. The performance is very good but sometimes we're facing the problem of out of memory.
> >
> > The Websphere JVM has already been tuned, with initial heap size:1280 and maximum heap size: 1536 along with Generic JVM Arguments.
> > The thread pools are also been configured to smaller size than the default. We monitored through Performance Management Viewer but we still got no clues.
> >
> > Do you have any suggestion to eliminate the Out of Memory to optimize the websphere?
> >
> > Any suggestion & recommendation would be greatly appreciated.
> >
> > Thank you so much.
> >
> >
>
>
>
>
>
>
>
>
>


From: Jason Verly (2012-07-09 15:29)

How many users do you typically have logging into Maximo at the same time? That will help guide some of the answers as well.
--- In MAXIMO@yahoogroups.com, Will Hampton <will.hampton@...> wrote:
>
> 32 bit OS cannot address more than about 2.8 gigs without some form of extensions in use...
>
> ... why are you 32 bit on a machine with 12 gigs of RAM??
>
> Is everything installed on the one machine? IF so you may be stepping on your server JVM memory space when you try to expand the JVM memory post installation.
>
> R/
> Will
>
> From: MAXIMO@yahoogroups.com [mailto:MAXIMO@yahoogroups.com] On Behalf Of hediaka@...
> Sent: Monday, July 09, 2012 6:57 AM
> To: maximo yahoogroups
> Subject: Re: [MAXIMO List] Websphere tuning on Maximo 7.5
>
>
>
> Hi Chris,
>
> Thank you for your suggestion. Yes, I need to increase the heap size more than 2 gigs, but somehow the MXServer can't be started if I change the initial and the max heap size more than 1.5gigs.
> We're running on windows server 2003 32 bit Enterprise with 12gigs RAM.
>
> Do you have any idea how to increase the heap size(min&max)?
>
> Thank you so much
>
>
>
> Regards,
>
> Tommy Hediaka S.
>
> -----Original Message-----
> From: Chris Lawless <lawlessc@...<mailto:lawlessc%40gmail.com>>
> Sender: MAXIMO@yahoogroups.com<mailto:MAXIMO%40yahoogroups.com>
> Date: Mon, 9 Jul 2012 04:37:53
> To: MAXIMO@yahoogroups.com<mailto:MAXIMO%40yahoogroups.com><MAXIMO@yahoogroups.com<mailto:MAXIMO%40yahoogroups.com>>
> Reply-To: MAXIMO@yahoogroups.com<mailto:MAXIMO%40yahoogroups.com>
> Subject: Re: [MAXIMO List] Websphere tuning on Maximo 7.5
>
> Why is the heap so small? For 7.5 the recommended min and max is 4096.
>
> Chris.
>
> On Jul 8, 2012, at 11:38 PM, "Tommy H Sumarsono" <hediaka@...<mailto:hediaka%40yahoo.co.id>> wrote:
>
> > Dear WebSphere Experts,
> >
> > Our maximo 7.5 is running on ms sql server 2008 and IBM websphere. The performance is very good but sometimes we're facing the problem of out of memory.
> >
> > The Websphere JVM has already been tuned, with initial heap size:1280 and maximum heap size: 1536 along with Generic JVM Arguments.
> > The thread pools are also been configured to smaller size than the default. We monitored through Performance Management Viewer but we still got no clues.
> >
> > Do you have any suggestion to eliminate the Out of Memory to optimize the websphere?
> >
> > Any suggestion & recommendation would be greatly appreciated.
> >
> > Thank you so much.
> >
> >
>
>
>
>
>
>
>
>
>
>
>
>


From: Will Hampton (2012-07-09 15:51)

Depending on versions of Windows - you can check yours to be sure what can be accessed here are the links for the information on how to tell what's supported:
Physical Memory Limits: Windows Server 2008 R2; Physical Address Extension (PAE)
http://msdn.microsoft.com/en-us/library/windows/desktop/aa366778(v=vs.85).aspx#physical_memory_limits_windows_server_2008_r2
http://msdn.microsoft.com/en-us/library/windows/desktop/aa366796(v=vs.85).aspx
R/
Will
From: MAXIMO@yahoogroups.com [mailto:MAXIMO@yahoogroups.com] On Behalf Of pkroseman
Sent: Monday, July 09, 2012 10:29 AM
To: MAXIMO@yahoogroups.com
Subject: Re: [MAXIMO List] Websphere tuning on Maximo 7.5
Even though Windows Enterprise can see more than 4GB each 32-bit process can only use 2 GB total space (3 GB with the boot.ini switch enabled). The total space includes both the memory you see in task manager and hidden space as native memeory.
I had Out Of Memory issues with heap of 1536 when running on 32-bit also. I changed the max to 1280 and have not had any problems since.
Process Explorer can show total process size using the Virtual Size field.
I also highly recommend reading the IBM article Thanks for the Memory (http://www.ibm.com/developerworks/java/library/j-nativememory-linux/). It explains how the native space is used and how it relates to java.
If you have a lot of users (15+) using simultaneously, you may need to setup a second application server. You could do this on the same server and WebSphere if you aren't approaching your 12 GB yet. This will give you 2 processes, each with 2GB of space.
Hope you solve your issues.
--- In MAXIMO@yahoogroups.com<mailto:MAXIMO%40yahoogroups.com>, hediaka@... wrote:
>
> Hi Chris,
>
> Thank you for your suggestion. Yes, I need to increase the heap size more than 2 gigs, but somehow the MXServer can't be started if I change the initial and the max heap size more than 1.5gigs.
> We're running on windows server 2003 32 bit Enterprise with 12gigs RAM.
>
> Do you have any idea how to increase the heap size(min&max)?
>
> Thank you so much
>
>
>
> Regards,
>
> Tommy Hediaka S.
>
> -----Original Message-----
> From: Chris Lawless <lawlessc@...<mailto:lawlessc@...>>
> Sender: MAXIMO@yahoogroups.com<mailto:MAXIMO%40yahoogroups.com>
> Date: Mon, 9 Jul 2012 04:37:53
> To: MAXIMO@yahoogroups.com<mailto:MAXIMO%40yahoogroups.com><MAXIMO@yahoogroups.com<mailto:MAXIMO%40yahoogroups.com>>
> Reply-To: MAXIMO@yahoogroups.com<mailto:MAXIMO%40yahoogroups.com>
> Subject: Re: [MAXIMO List] Websphere tuning on Maximo 7.5
>
> Why is the heap so small? For 7.5 the recommended min and max is 4096.
>
> Chris.
>
> On Jul 8, 2012, at 11:38 PM, "Tommy H Sumarsono" <hediaka@...<mailto:hediaka@...>> wrote:
>
> > Dear WebSphere Experts,
> >
> > Our maximo 7.5 is running on ms sql server 2008 and IBM websphere. The performance is very good but sometimes we're facing the problem of out of memory.
> >
> > The Websphere JVM has already been tuned, with initial heap size:1280 and maximum heap size: 1536 along with Generic JVM Arguments.
> > The thread pools are also been configured to smaller size than the default. We monitored through Performance Management Viewer but we still got no clues.
> >
> > Do you have any suggestion to eliminate the Out of Memory to optimize the websphere?
> >
> > Any suggestion & recommendation would be greatly appreciated.
> >
> > Thank you so much.
> >
> >
>
>
>
>
>
>
>
>
>


From: hediaka (2012-07-09 16:05)

Hi Will,
Thank you for your reply.
We use Windows Server 32 bit Enterprise Edition that can address more than 3 gigs memory. Currently we use 12 gigs. It's all installed on the server, and Windows OS detects the 12 gigs of memory.
I wonder why the websphere is unable to set the JVM more than 2 gigs.
Regards,
Tommy.
-----Original Message-----
From: Will Hampton <will.hampton@exxtremeconsulting.com>
Sender: MAXIMO@yahoogroups.com
Date: Mon, 9 Jul 2012 14:54:52
To: MAXIMO@yahoogroups.com<MAXIMO@yahoogroups.com>
Reply-To: MAXIMO@yahoogroups.com
Subject: RE: [MAXIMO List] Websphere tuning on Maximo 7.5
32 bit OS cannot address more than about 2.8 gigs without some form of extensions in use...
... why are you 32 bit on a machine with 12 gigs of RAM??
Is everything installed on the one machine? IF so you may be stepping on your server JVM memory space when you try to expand the JVM memory post installation.
R/
Will
From: MAXIMO@yahoogroups.com [mailto:MAXIMO@yahoogroups.com] On Behalf Of hediaka@yahoo.co.id
Sent: Monday, July 09, 2012 6:57 AM
To: maximo yahoogroups
Subject: Re: [MAXIMO List] Websphere tuning on Maximo 7.5
Hi Chris,
Thank you for your suggestion. Yes, I need to increase the heap size more than 2 gigs, but somehow the MXServer can't be started if I change the initial and the max heap size more than 1.5gigs.
We're running on windows server 2003 32 bit Enterprise with 12gigs RAM.
Do you have any idea how to increase the heap size(min&max)?
Thank you so much
Regards,
Tommy Hediaka S.
-----Original Message-----
From: Chris Lawless <lawlessc@gmail.com<mailto:lawlessc%40gmail.com>>
Sender: MAXIMO@yahoogroups.com<mailto:MAXIMO%40yahoogroups.com>
Date: Mon, 9 Jul 2012 04:37:53
To: MAXIMO@yahoogroups.com<mailto:MAXIMO%40yahoogroups.com><MAXIMO@yahoogroups.com<mailto:MAXIMO%40yahoogroups.com>>
Reply-To: MAXIMO@yahoogroups.com<mailto:MAXIMO%40yahoogroups.com>
Subject: Re: [MAXIMO List] Websphere tuning on Maximo 7.5
Why is the heap so small? For 7.5 the recommended min and max is 4096.
Chris.
On Jul 8, 2012, at 11:38 PM, "Tommy H Sumarsono" <hediaka@yahoo.co.id<mailto:hediaka%40yahoo.co.id>> wrote:
> Dear WebSphere Experts,
>
> Our maximo 7.5 is running on ms sql server 2008 and IBM websphere. The performance is very good but sometimes we're facing the problem of out of memory.
>
> The Websphere JVM has already been tuned, with initial heap size:1280 and maximum heap size: 1536 along with Generic JVM Arguments.
> The thread pools are also been configured to smaller size than the default. We monitored through Performance Management Viewer but we still got no clues.
>
> Do you have any suggestion to eliminate the Out of Memory to optimize the websphere?
>
> Any suggestion & recommendation would be greatly appreciated.
>
> Thank you so much.
>
>



From: hediaka (2012-07-09 16:08)


Thank you for the helpfull link Will.
I greatly apprecite it.
I suspect the websphere only detects the OS version(32bit) not the physical memory.

Regards,
Tommy.
-----Original Message-----
From: Will Hampton <will.hampton@exxtremeconsulting.com>
Sender: MAXIMO@yahoogroups.com
Date: Mon, 9 Jul 2012 15:51:29
To: MAXIMO@yahoogroups.com<MAXIMO@yahoogroups.com>
Reply-To: MAXIMO@yahoogroups.com
Subject: RE: [MAXIMO List] Websphere tuning on Maximo 7.5
Depending on versions of Windows - you can check yours to be sure what can be accessed here are the links for the information on how to tell what's supported:
Physical Memory Limits: Windows Server 2008 R2; Physical Address Extension (PAE)
http://msdn.microsoft.com/en-us/library/windows/desktop/aa366778(v=vs.85).aspx#physical_memory_limits_windows_server_2008_r2
http://msdn.microsoft.com/en-us/library/windows/desktop/aa366796(v=vs.85).aspx
R/
Will
From: MAXIMO@yahoogroups.com [mailto:MAXIMO@yahoogroups.com] On Behalf Of pkroseman
Sent: Monday, July 09, 2012 10:29 AM
To: MAXIMO@yahoogroups.com
Subject: Re: [MAXIMO List] Websphere tuning on Maximo 7.5
Even though Windows Enterprise can see more than 4GB each 32-bit process can only use 2 GB total space (3 GB with the boot.ini switch enabled). The total space includes both the memory you see in task manager and hidden space as native memeory.
I had Out Of Memory issues with heap of 1536 when running on 32-bit also. I changed the max to 1280 and have not had any problems since.
Process Explorer can show total process size using the Virtual Size field.
I also highly recommend reading the IBM article Thanks for the Memory (http://www.ibm.com/developerworks/java/library/j-nativememory-linux/). It explains how the native space is used and how it relates to java.
If you have a lot of users (15+) using simultaneously, you may need to setup a second application server. You could do this on the same server and WebSphere if you aren't approaching your 12 GB yet. This will give you 2 processes, each with 2GB of space.
Hope you solve your issues.
--- In MAXIMO@yahoogroups.com<mailto:MAXIMO%40yahoogroups.com>, hediaka@... wrote:
>
> Hi Chris,
>
> Thank you for your suggestion. Yes, I need to increase the heap size more than 2 gigs, but somehow the MXServer can't be started if I change the initial and the max heap size more than 1.5gigs.
> We're running on windows server 2003 32 bit Enterprise with 12gigs RAM.
>
> Do you have any idea how to increase the heap size(min&max)?
>
> Thank you so much
>
>
>
> Regards,
>
> Tommy Hediaka S.
>
> -----Original Message-----
> From: Chris Lawless <lawlessc@...<mailto:lawlessc@...>>
> Sender: MAXIMO@yahoogroups.com<mailto:MAXIMO%40yahoogroups.com>
> Date: Mon, 9 Jul 2012 04:37:53
> To: MAXIMO@yahoogroups.com<mailto:MAXIMO%40yahoogroups.com><MAXIMO@yahoogroups.com<mailto:MAXIMO%40yahoogroups.com>>
> Reply-To: MAXIMO@yahoogroups.com<mailto:MAXIMO%40yahoogroups.com>
> Subject: Re: [MAXIMO List] Websphere tuning on Maximo 7.5
>
> Why is the heap so small? For 7.5 the recommended min and max is 4096.
>
> Chris.
>
> On Jul 8, 2012, at 11:38 PM, "Tommy H Sumarsono" <hediaka@...<mailto:hediaka@...>> wrote:
>
> > Dear WebSphere Experts,
> >
> > Our maximo 7.5 is running on ms sql server 2008 and IBM websphere. The performance is very good but sometimes we're facing the problem of out of memory.
> >
> > The Websphere JVM has already been tuned, with initial heap size:1280 and maximum heap size: 1536 along with Generic JVM Arguments.
> > The thread pools are also been configured to smaller size than the default. We monitored through Performance Management Viewer but we still got no clues.
> >
> > Do you have any suggestion to eliminate the Out of Memory to optimize the websphere?
> >
> > Any suggestion & recommendation would be greatly appreciated.
> >
> > Thank you so much.
> >
> >
>
>
>
>
>
>
>
>
>


From: hediaka (2012-07-09 16:13)

Hi Jason,
Currently, we have 30+ users that can login into maximo server at the same time.
As long as we're unable to set the JVM more than 1.5gigs, we're unable to make the maximo server running stable.
Regards,
Tommy.
-----Original Message-----
From: "Jason Verly" <jason.verly@yahoo.com>
Sender: MAXIMO@yahoogroups.com
Date: Mon, 09 Jul 2012 15:29:57
To: <MAXIMO@yahoogroups.com>
Reply-To: MAXIMO@yahoogroups.com
Subject: Re: [MAXIMO List] Websphere tuning on Maximo 7.5
How many users do you typically have logging into Maximo at the same time? That will help guide some of the answers as well.
--- In MAXIMO@yahoogroups.com, Will Hampton <will.hampton@...> wrote:
>
> 32 bit OS cannot address more than about 2.8 gigs without some form of extensions in use...
>
> ... why are you 32 bit on a machine with 12 gigs of RAM??
>
> Is everything installed on the one machine? IF so you may be stepping on your server JVM memory space when you try to expand the JVM memory post installation.
>
> R/
> Will
>
> From: MAXIMO@yahoogroups.com [mailto:MAXIMO@yahoogroups.com] On Behalf Of hediaka@...
> Sent: Monday, July 09, 2012 6:57 AM
> To: maximo yahoogroups
> Subject: Re: [MAXIMO List] Websphere tuning on Maximo 7.5
>
>
>
> Hi Chris,
>
> Thank you for your suggestion. Yes, I need to increase the heap size more than 2 gigs, but somehow the MXServer can't be started if I change the initial and the max heap size more than 1.5gigs.
> We're running on windows server 2003 32 bit Enterprise with 12gigs RAM.
>
> Do you have any idea how to increase the heap size(min&max)?
>
> Thank you so much
>
>
>
> Regards,
>
> Tommy Hediaka S.
>
> -----Original Message-----
> From: Chris Lawless <lawlessc@...<mailto:lawlessc%40gmail.com>>
> Sender: MAXIMO@yahoogroups.com<mailto:MAXIMO%40yahoogroups.com>
> Date: Mon, 9 Jul 2012 04:37:53
> To: MAXIMO@yahoogroups.com<mailto:MAXIMO%40yahoogroups.com><MAXIMO@yahoogroups.com<mailto:MAXIMO%40yahoogroups.com>>
> Reply-To: MAXIMO@yahoogroups.com<mailto:MAXIMO%40yahoogroups.com>
> Subject: Re: [MAXIMO List] Websphere tuning on Maximo 7.5
>
> Why is the heap so small? For 7.5 the recommended min and max is 4096.
>
> Chris.
>
> On Jul 8, 2012, at 11:38 PM, "Tommy H Sumarsono" <hediaka@...<mailto:hediaka%40yahoo.co.id>> wrote:
>
> > Dear WebSphere Experts,
> >
> > Our maximo 7.5 is running on ms sql server 2008 and IBM websphere. The performance is very good but sometimes we're facing the problem of out of memory.
> >
> > The Websphere JVM has already been tuned, with initial heap size:1280 and maximum heap size: 1536 along with Generic JVM Arguments.
> > The thread pools are also been configured to smaller size than the default. We monitored through Performance Management Viewer but we still got no clues.
> >
> > Do you have any suggestion to eliminate the Out of Memory to optimize the websphere?
> >
> > Any suggestion & recommendation would be greatly appreciated.
> >
> > Thank you so much.
> >
> >
>
>
>
>
>
>
>
>
>
>
>
>


From: Will Hampton (2012-07-09 16:41)

Hi Tommy,
Here are a couple of references, basically you're most likely experiencing a problem with your JVM memory space (what I was referring to in my first message) the "young" space / contiguous memory is part of the problem, the first reference is for 64 bit 7.5 but it's still applicable for your problem (I believe) and the second provides more information (note that the memory amounts are specific to the examples being presented - don't think they are not applicable since they are less than your working with; the examples are still relevant):
Can you send your exact error?
--------------------
http://www-01.ibm.com/support/docview.wss?uid=swg21508584
VMJ9VM015W Initialization error for library j9gc24(2): Failed to initialize
Could not create the Java virtual machine.
JVMJ9GC019E -Xmn too large for -Xms
Note: -Xmn - this setting controls how much space the young generation is allowed to consume on the heap. Properly tuning this parameter can reduce the overhead of garbage collection, improving server response time and throughput. This setting should be below half of the overall (Xmx) heap size.
-----------------------
http://johnsrandommusings.tumblr.com/post/11162314370/why-wont-my-jvm-start-with-this-heap-size
The problem
While trying to start a Java application with a maximum heap size of 1GB, you receive the following error:
"JVMJ9VM015W Initialization error for library j9gc24(2): Failed to instantiate heap; 1G requested
Could not create the Java virtual machine."
But when you look at the available memory the system reports 1.2GB of free memory. You are able to start a JVM with the maximum heap size configured to 800MB. Why won't the JVM start with 1GB of heap space?
-----------------------
R/
Will
From: MAXIMO@yahoogroups.com [mailto:MAXIMO@yahoogroups.com] On Behalf Of hediaka@yahoo.co.id
Sent: Monday, July 09, 2012 11:06 AM
To: maximo yahoogroups
Subject: Re: [MAXIMO List] Websphere tuning on Maximo 7.5
Hi Will,
Thank you for your reply.
We use Windows Server 32 bit Enterprise Edition that can address more than 3 gigs memory. Currently we use 12 gigs. It's all installed on the server, and Windows OS detects the 12 gigs of memory.
I wonder why the websphere is unable to set the JVM more than 2 gigs.
Regards,
Tommy.
-----Original Message-----
From: Will Hampton <will.hampton@exxtremeconsulting.com<mailto:will.hampton%40exxtremeconsulting.com>>
Sender: MAXIMO@yahoogroups.com<mailto:MAXIMO%40yahoogroups.com>
Date: Mon, 9 Jul 2012 14:54:52
To: MAXIMO@yahoogroups.com<mailto:MAXIMO%40yahoogroups.com><MAXIMO@yahoogroups.com<mailto:MAXIMO%40yahoogroups.com>>
Reply-To: MAXIMO@yahoogroups.com<mailto:MAXIMO%40yahoogroups.com>
Subject: RE: [MAXIMO List] Websphere tuning on Maximo 7.5
32 bit OS cannot address more than about 2.8 gigs without some form of extensions in use...
... why are you 32 bit on a machine with 12 gigs of RAM??
Is everything installed on the one machine? IF so you may be stepping on your server JVM memory space when you try to expand the JVM memory post installation.
R/
Will
From: MAXIMO@yahoogroups.com<mailto:MAXIMO%40yahoogroups.com> [mailto:MAXIMO@yahoogroups.com<mailto:MAXIMO%40yahoogroups.com>] On Behalf Of hediaka@yahoo.co.id<mailto:hediaka%40yahoo.co.id>
Sent: Monday, July 09, 2012 6:57 AM
To: maximo yahoogroups
Subject: Re: [MAXIMO List] Websphere tuning on Maximo 7.5
Hi Chris,
Thank you for your suggestion. Yes, I need to increase the heap size more than 2 gigs, but somehow the MXServer can't be started if I change the initial and the max heap size more than 1.5gigs.
We're running on windows server 2003 32 bit Enterprise with 12gigs RAM.
Do you have any idea how to increase the heap size(min&max)?
Thank you so much
Regards,
Tommy Hediaka S.
-----Original Message-----
From: Chris Lawless <lawlessc@gmail.com<mailto:lawlessc%40gmail.com><mailto:lawlessc%40gmail.com>>
Sender: MAXIMO@yahoogroups.com<mailto:MAXIMO%40yahoogroups.com><mailto:MAXIMO%40yahoogroups.com>
Date: Mon, 9 Jul 2012 04:37:53
To: MAXIMO@yahoogroups.com<mailto:MAXIMO%40yahoogroups.com><mailto:MAXIMO%40yahoogroups.com><MAXIMO@yahoogroups.com<mailto:MAXIMO%40yahoogroups.com><mailto:MAXIMO%40yahoogroups.com>>
Reply-To: MAXIMO@yahoogroups.com<mailto:MAXIMO%40yahoogroups.com><mailto:MAXIMO%40yahoogroups.com>
Subject: Re: [MAXIMO List] Websphere tuning on Maximo 7.5
Why is the heap so small? For 7.5 the recommended min and max is 4096.
Chris.
On Jul 8, 2012, at 11:38 PM, "Tommy H Sumarsono" <hediaka@yahoo.co.id<mailto:hediaka%40yahoo.co.id><mailto:hediaka%40yahoo.co.id>> wrote:
> Dear WebSphere Experts,
>
> Our maximo 7.5 is running on ms sql server 2008 and IBM websphere. The performance is very good but sometimes we're facing the problem of out of memory.
>
> The Websphere JVM has already been tuned, with initial heap size:1280 and maximum heap size: 1536 along with Generic JVM Arguments.
> The thread pools are also been configured to smaller size than the default. We monitored through Performance Management Viewer but we still got no clues.
>
> Do you have any suggestion to eliminate the Out of Memory to optimize the websphere?
>
> Any suggestion & recommendation would be greatly appreciated.
>
> Thank you so much.
>
>



From: hediaka (2012-07-09 16:41)

Dear Roseman,
Thank you for sending me the link.
It's very helpful.
We have arround 30+ users that can sign in into maximo at the same time.
We had change to 1280 and the OutOfMemory still occurs.
Regards,
Tommy.
-----Original Message-----
From: "pkroseman" <krosemanp@ci.superior.wi.us>
Sender: MAXIMO@yahoogroups.com
Date: Mon, 09 Jul 2012 15:29:16
To: <MAXIMO@yahoogroups.com>
Reply-To: MAXIMO@yahoogroups.com
Subject: Re: [MAXIMO List] Websphere tuning on Maximo 7.5
Even though Windows Enterprise can see more than 4GB each 32-bit process can only use 2 GB total space (3 GB with the boot.ini switch enabled). The total space includes both the memory you see in task manager and hidden space as native memeory.
I had Out Of Memory issues with heap of 1536 when running on 32-bit also. I changed the max to 1280 and have not had any problems since.
Process Explorer can show total process size using the Virtual Size field.
I also highly recommend reading the IBM article Thanks for the Memory (http://www.ibm.com/developerworks/java/library/j-nativememory-linux/). It explains how the native space is used and how it relates to java.
If you have a lot of users (15+) using simultaneously, you may need to setup a second application server. You could do this on the same server and WebSphere if you aren't approaching your 12 GB yet. This will give you 2 processes, each with 2GB of space.
Hope you solve your issues.
--- In MAXIMO@yahoogroups.com, hediaka@... wrote:
>
> Hi Chris,
>
> Thank you for your suggestion. Yes, I need to increase the heap size more than 2 gigs, but somehow the MXServer can't be started if I change the initial and the max heap size more than 1.5gigs.
> We're running on windows server 2003 32 bit Enterprise with 12gigs RAM.
>
> Do you have any idea how to increase the heap size(min&max)?
>
> Thank you so much
>
>
>
> Regards,
>
> Tommy Hediaka S.
>
> -----Original Message-----
> From: Chris Lawless <lawlessc@...>
> Sender: MAXIMO@yahoogroups.com
> Date: Mon, 9 Jul 2012 04:37:53
> To: MAXIMO@yahoogroups.com<MAXIMO@yahoogroups.com>
> Reply-To: MAXIMO@yahoogroups.com
> Subject: Re: [MAXIMO List] Websphere tuning on Maximo 7.5
>
> Why is the heap so small? For 7.5 the recommended min and max is 4096.
>
> Chris.
>
> On Jul 8, 2012, at 11:38 PM, "Tommy H Sumarsono" <hediaka@...> wrote:
>
> > Dear WebSphere Experts,
> >
> > Our maximo 7.5 is running on ms sql server 2008 and IBM websphere. The performance is very good but sometimes we're facing the problem of out of memory.
> >
> > The Websphere JVM has already been tuned, with initial heap size:1280 and maximum heap size: 1536 along with Generic JVM Arguments.
> > The thread pools are also been configured to smaller size than the default. We monitored through Performance Management Viewer but we still got no clues.
> >
> > Do you have any suggestion to eliminate the Out of Memory to optimize the websphere?
> >
> > Any suggestion & recommendation would be greatly appreciated.
> >
> > Thank you so much.
> >
> >
>
>
>
>
>
>
>
>
>


From: Jason Verly (2012-07-09 20:48)

In that case, I'd recomment upgrading the server to a 64bit server OS. This will allow the larger heap size for the JVM. On top of that, I'd suggest clustering the server so why you run on a single physical box, Websphere would run with 2 virtual servers. This will load balance your users across the 2 JVM's and minimize the chance of overloading a single JVM.
--- In MAXIMO@yahoogroups.com, hediaka@... wrote:
>
> Hi Jason,
>
> Currently, we have 30+ users that can login into maximo server at the same time.
> As long as we're unable to set the JVM more than 1.5gigs, we're unable to make the maximo server running stable.
>
>
>
> Regards,
>
> Tommy.
>
> -----Original Message-----
> From: "Jason Verly" <jason.verly@...>
> Sender: MAXIMO@yahoogroups.com
> Date: Mon, 09 Jul 2012 15:29:57
> To: <MAXIMO@yahoogroups.com>
> Reply-To: MAXIMO@yahoogroups.com
> Subject: Re: [MAXIMO List] Websphere tuning on Maximo 7.5
>
> How many users do you typically have logging into Maximo at the same time? That will help guide some of the answers as well.
>
> --- In MAXIMO@yahoogroups.com, Will Hampton <will.hampton@> wrote:
> >
> > 32 bit OS cannot address more than about 2.8 gigs without some form of extensions in use...
> >
> > ... why are you 32 bit on a machine with 12 gigs of RAM??
> >
> > Is everything installed on the one machine? IF so you may be stepping on your server JVM memory space when you try to expand the JVM memory post installation.
> >
> > R/
> > Will
> >
> > From: MAXIMO@yahoogroups.com [mailto:MAXIMO@yahoogroups.com] On Behalf Of hediaka@
> > Sent: Monday, July 09, 2012 6:57 AM
> > To: maximo yahoogroups
> > Subject: Re: [MAXIMO List] Websphere tuning on Maximo 7.5
> >
> >
> >
> > Hi Chris,
> >
> > Thank you for your suggestion. Yes, I need to increase the heap size more than 2 gigs, but somehow the MXServer can't be started if I change the initial and the max heap size more than 1.5gigs.
> > We're running on windows server 2003 32 bit Enterprise with 12gigs RAM.
> >
> > Do you have any idea how to increase the heap size(min&max)?
> >
> > Thank you so much
> >
> >
> >
> > Regards,
> >
> > Tommy Hediaka S.
> >
> > -----Original Message-----
> > From: Chris Lawless <lawlessc@<mailto:lawlessc%40gmail.com>>
> > Sender: MAXIMO@yahoogroups.com<mailto:MAXIMO%40yahoogroups.com>
> > Date: Mon, 9 Jul 2012 04:37:53
> > To: MAXIMO@yahoogroups.com<mailto:MAXIMO%40yahoogroups.com><MAXIMO@yahoogroups.com<mailto:MAXIMO%40yahoogroups.com>>
> > Reply-To: MAXIMO@yahoogroups.com<mailto:MAXIMO%40yahoogroups.com>
> > Subject: Re: [MAXIMO List] Websphere tuning on Maximo 7.5
> >
> > Why is the heap so small? For 7.5 the recommended min and max is 4096.
> >
> > Chris.
> >
> > On Jul 8, 2012, at 11:38 PM, "Tommy H Sumarsono" <hediaka@<mailto:hediaka%40yahoo.co.id>> wrote:
> >
> > > Dear WebSphere Experts,
> > >
> > > Our maximo 7.5 is running on ms sql server 2008 and IBM websphere. The performance is very good but sometimes we're facing the problem of out of memory.
> > >
> > > The Websphere JVM has already been tuned, with initial heap size:1280 and maximum heap size: 1536 along with Generic JVM Arguments.
> > > The thread pools are also been configured to smaller size than the default. We monitored through Performance Management Viewer but we still got no clues.
> > >
> > > Do you have any suggestion to eliminate the Out of Memory to optimize the websphere?
> > >
> > > Any suggestion & recommendation would be greatly appreciated.
> > >
> > > Thank you so much.
> > >
> > >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
>
>
>
>
>
>
>


From: Mark Dong (2012-07-09 17:37)

In that case ,  IBM WebSphere has published a technote for the Out of Memory problem in SDK 1.6 SR9. The out of memory problem has been experienced in Maximo environments using WebSphere 7.0 
Please visit the following link,
   
       http://www-01.ibm.com/support/docview.wss?uid=swg21578450
 Maybe  this link can help you.
Mark
________________________________
From: Jason Verly <jason.verly@yahoo.com>
To: MAXIMO@yahoogroups.com
Sent: Tuesday, July 10, 2012 4:48 AM
Subject: Re: [MAXIMO List] Websphere tuning on Maximo 7.5

 
In that case, I'd recomment upgrading the server to a 64bit server OS. This will allow the larger heap size for the JVM. On top of that, I'd suggest clustering the server so why you run on a single physical box, Websphere would run with 2 virtual servers. This will load balance your users across the 2 JVM's and minimize the chance of overloading a single JVM.
--- In MAXIMO@yahoogroups.com, hediaka@... wrote:
>
> Hi Jason,
>
> Currently, we have 30+ users that can login into maximo server at the same time.
> As long as we're unable to set the JVM more than 1.5gigs, we're unable to make the maximo server running stable.
>
>
>
> Regards,
>
> Tommy.
>
> -----Original Message-----
> From: "Jason Verly" <jason.verly@...>
> Sender: MAXIMO@yahoogroups.com
> Date: Mon, 09 Jul 2012 15:29:57
> To: <MAXIMO@yahoogroups.com>
> Reply-To: MAXIMO@yahoogroups.com
> Subject: Re: [MAXIMO List] Websphere tuning on Maximo 7.5
>
> How many users do you typically have logging into Maximo at the same time? That will help guide some of the answers as well.
>
> --- In MAXIMO@yahoogroups.com, Will Hampton <will.hampton@> wrote:
> >
> > 32 bit OS cannot address more than about 2.8 gigs without some form of extensions in use...
> >
> > ... why are you 32 bit on a machine with 12 gigs of RAM??
> >
> > Is everything installed on the one machine? IF so you may be stepping on your server JVM memory space when you try to expand the JVM memory post installation.
> >
> > R/
> > Will
> >
> > From: MAXIMO@yahoogroups.com [mailto:MAXIMO@yahoogroups.com] On Behalf Of hediaka@
> > Sent: Monday, July 09, 2012 6:57 AM
> > To: maximo yahoogroups
> > Subject: Re: [MAXIMO List] Websphere tuning on Maximo 7.5
> >
> >
> >
> > Hi Chris,
> >
> > Thank you for your suggestion. Yes, I need to increase the heap size more than 2 gigs, but somehow the MXServer can't be started if I change the initial and the max heap size more than 1.5gigs.
> > We're running on windows server 2003 32 bit Enterprise with 12gigs RAM.
> >
> > Do you have any idea how to increase the heap size(min&max)?
> >
> > Thank you so much
> >
> >
> >
> > Regards,
> >
> > Tommy Hediaka S.
> >
> > -----Original Message-----
> > From: Chris Lawless <lawlessc@<mailto:lawlessc%40gmail.com>>
> > Sender: MAXIMO@yahoogroups.com<mailto:MAXIMO%40yahoogroups.com>
> > Date: Mon, 9 Jul 2012 04:37:53
> > To: MAXIMO@yahoogroups.com<mailto:MAXIMO%40yahoogroups.com><MAXIMO@yahoogroups.com<mailto:MAXIMO%40yahoogroups.com>>
> > Reply-To: MAXIMO@yahoogroups.com<mailto:MAXIMO%40yahoogroups.com>
> > Subject: Re: [MAXIMO List] Websphere tuning on Maximo 7.5
> >
> > Why is the heap so small? For 7.5 the recommended min and max is 4096.
> >
> > Chris.
> >
> > On Jul 8, 2012, at 11:38 PM, "Tommy H Sumarsono" <hediaka@<mailto:hediaka%40yahoo.co.id>> wrote:
> >
> > > Dear WebSphere Experts,
> > >
> > > Our maximo 7.5 is running on ms sql server 2008 and IBM websphere. The performance is very good but sometimes we're facing the problem of out of memory.
> > >
> > > The Websphere JVM has already been tuned, with initial heap size:1280 and maximum heap size: 1536 along with Generic JVM Arguments.
> > > The thread pools are also been configured to smaller size than the default. We monitored through Performance Management Viewer but we still got no clues.
> > >
> > > Do you have any suggestion to eliminate the Out of Memory to optimize the websphere?
> > >
> > > Any suggestion & recommendation would be greatly appreciated.
> > >
> > > Thank you so much.
> > >
> > >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
>
>
>
>
>
>
>


From: Tommy H Sumarsono (2012-07-12 12:39)


Hi Mark,
Thank you for the link
We've solved the problem. The performance of our maximo 7.5 is good, stable, and fast!
thanks!
Regards,
Tommy
--- In MAXIMO@yahoogroups.com, Mark Dong <mark.dong@...> wrote:
>
> In that case ,  IBM WebSphere has published a technote for the Out of Memory problem in SDK 1.6 SR9. The out of memory problem has been experienced in Maximo environments using WebSphere 7.0 
> Please visit the following link,
>    
>        http://www-01.ibm.com/support/docview.wss?uid=swg21578450
>
>
>  Maybe  this link can help you.
>
> Mark
>
>
> ________________________________
> From: Jason Verly <jason.verly@...>
> To: MAXIMO@yahoogroups.com
> Sent: Tuesday, July 10, 2012 4:48 AM
> Subject: Re: [MAXIMO List] Websphere tuning on Maximo 7.5
>
>
>  
> In that case, I'd recomment upgrading the server to a 64bit server OS. This will allow the larger heap size for the JVM. On top of that, I'd suggest clustering the server so why you run on a single physical box, Websphere would run with 2 virtual servers. This will load balance your users across the 2 JVM's and minimize the chance of overloading a single JVM.
>
> --- In MAXIMO@yahoogroups.com, hediaka@ wrote:
> >
> > Hi Jason,
> >
> > Currently, we have 30+ users that can login into maximo server at the same time.
> > As long as we're unable to set the JVM more than 1.5gigs, we're unable to make the maximo server running stable.
> >
> >
> >
> > Regards,
> >
> > Tommy.
> >
> > -----Original Message-----
> > From: "Jason Verly" <jason.verly@>
> > Sender: MAXIMO@yahoogroups.com
> > Date: Mon, 09 Jul 2012 15:29:57
> > To: <MAXIMO@yahoogroups.com>
> > Reply-To: MAXIMO@yahoogroups.com
> > Subject: Re: [MAXIMO List] Websphere tuning on Maximo 7.5
> >
> > How many users do you typically have logging into Maximo at the same time? That will help guide some of the answers as well.
> >
> > --- In MAXIMO@yahoogroups.com, Will Hampton <will.hampton@> wrote:
> > >
> > > 32 bit OS cannot address more than about 2.8 gigs without some form of extensions in use...
> > >
> > > ... why are you 32 bit on a machine with 12 gigs of RAM??
> > >
> > > Is everything installed on the one machine? IF so you may be stepping on your server JVM memory space when you try to expand the JVM memory post installation.
> > >
> > > R/
> > > Will
> > >
> > > From: MAXIMO@yahoogroups.com [mailto:MAXIMO@yahoogroups.com] On Behalf Of hediaka@
> > > Sent: Monday, July 09, 2012 6:57 AM
> > > To: maximo yahoogroups
> > > Subject: Re: [MAXIMO List] Websphere tuning on Maximo 7.5
> > >
> > >
> > >
> > > Hi Chris,
> > >
> > > Thank you for your suggestion. Yes, I need to increase the heap size more than 2 gigs, but somehow the MXServer can't be started if I change the initial and the max heap size more than 1.5gigs.
> > > We're running on windows server 2003 32 bit Enterprise with 12gigs RAM.
> > >
> > > Do you have any idea how to increase the heap size(min&max)?
> > >
> > > Thank you so much
> > >
> > >
> > >
> > > Regards,
> > >
> > > Tommy Hediaka S.
> > >
> > > -----Original Message-----
> > > From: Chris Lawless <lawlessc@<mailto:lawlessc%40gmail.com>>
> > > Sender: MAXIMO@yahoogroups.com<mailto:MAXIMO%40yahoogroups.com>
> > > Date: Mon, 9 Jul 2012 04:37:53
> > > To: MAXIMO@yahoogroups.com<mailto:MAXIMO%40yahoogroups.com><MAXIMO@yahoogroups.com<mailto:MAXIMO%40yahoogroups.com>>
> > > Reply-To: MAXIMO@yahoogroups.com<mailto:MAXIMO%40yahoogroups.com>
> > > Subject: Re: [MAXIMO List] Websphere tuning on Maximo 7.5
> > >
> > > Why is the heap so small? For 7.5 the recommended min and max is 4096.
> > >
> > > Chris.
> > >
> > > On Jul 8, 2012, at 11:38 PM, "Tommy H Sumarsono" <hediaka@<mailto:hediaka%40yahoo.co.id>> wrote:
> > >
> > > > Dear WebSphere Experts,
> > > >
> > > > Our maximo 7.5 is running on ms sql server 2008 and IBM websphere. The performance is very good but sometimes we're facing the problem of out of memory.
> > > >
> > > > The Websphere JVM has already been tuned, with initial heap size:1280 and maximum heap size: 1536 along with Generic JVM Arguments.
> > > > The thread pools are also been configured to smaller size than the default. We monitored through Performance Management Viewer but we still got no clues.
> > > >
> > > > Do you have any suggestion to eliminate the Out of Memory to optimize the websphere?
> > > >
> > > > Any suggestion & recommendation would be greatly appreciated.
> > > >
> > > > Thank you so much.
> > > >
> > > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> >
> >
> >
> >
> >
> >
> >
>
>
>
>
>
>


From: Tommy H Sumarsono (2012-07-15 11:59)


Hi Mark,
Thank you for your suggestion.
We've tuned our database server and webpshere application server.
Now, our maximo 7.5 runs very fast and stable after running over many days.
Thank you experts
regards,
Tommy
--- In MAXIMO@yahoogroups.com, Mark Dong <mark.dong@...> wrote:
>
> In that case ,  IBM WebSphere has published a technote for the Out of Memory problem in SDK 1.6 SR9. The out of memory problem has been experienced in Maximo environments using WebSphere 7.0 
> Please visit the following link,
>    
>        http://www-01.ibm.com/support/docview.wss?uid=swg21578450
>
>
>  Maybe  this link can help you.
>
> Mark
>
>
> ________________________________
> From: Jason Verly <jason.verly@...>
> To: MAXIMO@yahoogroups.com
> Sent: Tuesday, July 10, 2012 4:48 AM
> Subject: Re: [MAXIMO List] Websphere tuning on Maximo 7.5
>
>
>  
> In that case, I'd recomment upgrading the server to a 64bit server OS. This will allow the larger heap size for the JVM. On top of that, I'd suggest clustering the server so why you run on a single physical box, Websphere would run with 2 virtual servers. This will load balance your users across the 2 JVM's and minimize the chance of overloading a single JVM.
>
> --- In MAXIMO@yahoogroups.com, hediaka@ wrote:
> >
> > Hi Jason,
> >
> > Currently, we have 30+ users that can login into maximo server at the same time.
> > As long as we're unable to set the JVM more than 1.5gigs, we're unable to make the maximo server running stable.
> >
> >
> >
> > Regards,
> >
> > Tommy.
> >
> > -----Original Message-----
> > From: "Jason Verly" <jason.verly@>
> > Sender: MAXIMO@yahoogroups.com
> > Date: Mon, 09 Jul 2012 15:29:57
> > To: <MAXIMO@yahoogroups.com>
> > Reply-To: MAXIMO@yahoogroups.com
> > Subject: Re: [MAXIMO List] Websphere tuning on Maximo 7.5
> >
> > How many users do you typically have logging into Maximo at the same time? That will help guide some of the answers as well.
> >
> > --- In MAXIMO@yahoogroups.com, Will Hampton <will.hampton@> wrote:
> > >
> > > 32 bit OS cannot address more than about 2.8 gigs without some form of extensions in use...
> > >
> > > ... why are you 32 bit on a machine with 12 gigs of RAM??
> > >
> > > Is everything installed on the one machine? IF so you may be stepping on your server JVM memory space when you try to expand the JVM memory post installation.
> > >
> > > R/
> > > Will
> > >
> > > From: MAXIMO@yahoogroups.com [mailto:MAXIMO@yahoogroups.com] On Behalf Of hediaka@
> > > Sent: Monday, July 09, 2012 6:57 AM
> > > To: maximo yahoogroups
> > > Subject: Re: [MAXIMO List] Websphere tuning on Maximo 7.5
> > >
> > >
> > >
> > > Hi Chris,
> > >
> > > Thank you for your suggestion. Yes, I need to increase the heap size more than 2 gigs, but somehow the MXServer can't be started if I change the initial and the max heap size more than 1.5gigs.
> > > We're running on windows server 2003 32 bit Enterprise with 12gigs RAM.
> > >
> > > Do you have any idea how to increase the heap size(min&max)?
> > >
> > > Thank you so much
> > >
> > >
> > >
> > > Regards,
> > >
> > > Tommy Hediaka S.
> > >
> > > -----Original Message-----
> > > From: Chris Lawless <lawlessc@<mailto:lawlessc%40gmail.com>>
> > > Sender: MAXIMO@yahoogroups.com<mailto:MAXIMO%40yahoogroups.com>
> > > Date: Mon, 9 Jul 2012 04:37:53
> > > To: MAXIMO@yahoogroups.com<mailto:MAXIMO%40yahoogroups.com><MAXIMO@yahoogroups.com<mailto:MAXIMO%40yahoogroups.com>>
> > > Reply-To: MAXIMO@yahoogroups.com<mailto:MAXIMO%40yahoogroups.com>
> > > Subject: Re: [MAXIMO List] Websphere tuning on Maximo 7.5
> > >
> > > Why is the heap so small? For 7.5 the recommended min and max is 4096.
> > >
> > > Chris.
> > >
> > > On Jul 8, 2012, at 11:38 PM, "Tommy H Sumarsono" <hediaka@<mailto:hediaka%40yahoo.co.id>> wrote:
> > >
> > > > Dear WebSphere Experts,
> > > >
> > > > Our maximo 7.5 is running on ms sql server 2008 and IBM websphere. The performance is very good but sometimes we're facing the problem of out of memory.
> > > >
> > > > The Websphere JVM has already been tuned, with initial heap size:1280 and maximum heap size: 1536 along with Generic JVM Arguments.
> > > > The thread pools are also been configured to smaller size than the default. We monitored through Performance Management Viewer but we still got no clues.
> > > >
> > > > Do you have any suggestion to eliminate the Out of Memory to optimize the websphere?
> > > >
> > > > Any suggestion & recommendation would be greatly appreciated.
> > > >
> > > > Thank you so much.
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