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MQSeries.net Forum IndexClusteringIIB and MQ - performance issue

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xcuseme123
PostPosted: Fri Mar 06, 2020 6:49 am Post subject: Reply with quote

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Joined: 30 Jun 2013
Posts: 31

fjb_saper wrote:
Quote:
1TISIGINFO Dump Event "systhrow" (00040000) Detail "java/lang/OutOfMemoryError" "Failed to create a thread: retVal -1073741830, errno 11" received

Your e.g. 's JVM is running out of memory. you will need to check if that is due to message size or memory leak in your JCN.

Have fun


we are not using java compute node and also message size are 8KB on an average.. Out of memory can come due to mqm user has reached max thread utilization ?. how to calculate actual threads being used by MQ and IIB as they are running in NFS. Total number of msgflow threads are nearly 2000.
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fjb_saper
PostPosted: Sat Mar 07, 2020 3:33 pm Post subject: Reply with quote

Grand High Poobah

Joined: 18 Nov 2003
Posts: 20220
Location: LI,NY

xcuseme123 wrote:
fjb_saper wrote:
Quote:
1TISIGINFO Dump Event "systhrow" (00040000) Detail "java/lang/OutOfMemoryError" "Failed to create a thread: retVal -1073741830, errno 11" received

Your e.g. 's JVM is running out of memory. you will need to check if that is due to message size or memory leak in your JCN.

Have fun


we are not using java compute node and also message size are 8KB on an average.. Out of memory can come due to mqm user has reached max thread utilization ?. how to calculate actual threads being used by MQ and IIB as they are running in NFS. Total number of msgflow threads are nearly 2000.

Each of those 2000 threads needs some memory... so it looks like you have hit some scaling limit. You may need to distribute the flow across multiple execution groups (Integration Servers) or even across multiple Integration nodes and reduce the max number of threads to keep the global e.g. (i.e. jvm ) memory withing limits. I trust you already looked into using a bigger memory / heap stack for the e.g.
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xcuseme123
PostPosted: Sun Mar 08, 2020 9:15 pm Post subject: Reply with quote

Apprentice

Joined: 30 Jun 2013
Posts: 31

fjb_saper wrote:
xcuseme123 wrote:
fjb_saper wrote:
Quote:
1TISIGINFO Dump Event "systhrow" (00040000) Detail "java/lang/OutOfMemoryError" "Failed to create a thread: retVal -1073741830, errno 11" received

Your e.g. 's JVM is running out of memory. you will need to check if that is due to message size or memory leak in your JCN.

Have fun


we are not using java compute node and also message size are 8KB on an average.. Out of memory can come due to mqm user has reached max thread utilization ?. how to calculate actual threads being used by MQ and IIB as they are running in NFS. Total number of msgflow threads are nearly 2000.

Each of those 2000 threads needs some memory... so it looks like you have hit some scaling limit. You may need to distribute the flow across multiple execution groups (Integration Servers) or even across multiple Integration nodes and reduce the max number of threads to keep the global e.g. (i.e. jvm ) memory withing limits. I trust you already looked into using a bigger memory / heap stack for the e.g.


It seems like mqm user number threads restrictions of about 10240 at etc/security/limits.conf . Am thinking to double it and retest again
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xcuseme123
PostPosted: Wed Mar 11, 2020 9:33 am Post subject: Reply with quote

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Joined: 30 Jun 2013
Posts: 31

xcuseme123 wrote:


It seems like mqm user number threads restrictions of about 10240 at etc/security/limits.conf . Am thinking to double it and retest again


tested one round of end-end testing, performance was smooth. Didn't see any messages getting piled up input queues. Earlier we were seeing messages piled up and processing slowly.

Any suggestion increase values for mqm user at /etc/security/limits.conf ?.
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