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MQSeries.net Forum Index » WebSphere MQ API Support » mqrc 2539 in mq v7.5 - MaxChannels problem

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ramires
PostPosted: Sun Oct 21, 2012 12:51 pm    Post subject: Reply with quote

Chevalier

Joined: 24 Jun 2001
Posts: 484
Location: Portugal - Lisboa

and after changing kernel parameters , using the suggested ones from the Infocenter, I was able to connect
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bruce2359
PostPosted: Sun Oct 21, 2012 1:32 pm    Post subject: Reply with quote

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Joined: 05 Jan 2008
Posts: 6445
Location: US: west coast, almost.

Please help others who might encounter this issue.

What kernel parameters did you change? From what values to what value?
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ramires
PostPosted: Sun Oct 21, 2012 1:45 pm    Post subject: Reply with quote

Chevalier

Joined: 24 Jun 2001
Posts: 484
Location: Portugal - Lisboa

Thanks for noting that bruce! This is what I did:

edited /etc/sysctl.conf and add these entries:
Code:

kernel.msgmni = 1024
kernel.shmmni = 4096
kernel.shmall = 2097152
kernel.shmmax = 268435456
kernel.sem = 500 256000 250 1024
fs.file-max = 524288

as suggested in:

http://pic.dhe.ibm.com/infocenter/wmqv7/v7r5/topic/com.ibm.mq.doc/zi00760_.htm

I didn't have any values there before.

I'm doing this test in a Fedora release 14.
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sebastia
PostPosted: Mon Oct 22, 2012 1:01 am    Post subject: Reply with quote

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Joined: 07 Oct 2004
Posts: 926

Hello, coleagues.
Lets see the weekend pending items ...

OpSys :
Code:
[sebas@labss2 ~]$ cat /etc/issue
Red Hat Enterprise Linux AS release 4 (Nahant Update 4)


RAM :
Code:

[sebas@labss2 ~]$ cat /proc/meminfo
MemTotal:      8309660 kB
MemFree:         17044 kB
Buffers:         26896 kB
Cached:        8009964 kB
SwapCached:          0 kB
Active:         225036 kB


Error log : you are right, mr Ramires ...

Code:
[sebas@labss2 errors]$ cat AMQERR01.LOG  | grep 6024
AMQ6024: Insufficient resources are available to complete a system request.
AMQ6024: Insufficient resources are available to complete a system request.
AMQ6024: Insufficient resources are available to complete a system request.


/etc/sysctl.conf : changed and rebooting right now

Conclusion : I want to be able to code "MAXCHANNELS=30000" ... jejeje

More in 1 hour .. and THANKS A LOT !!!! Sebastian.
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sebastia
PostPosted: Mon Oct 22, 2012 1:53 am    Post subject: Reply with quote

Guardian

Joined: 07 Oct 2004
Posts: 926

OK - with modified Kernel values, I can code 30.000 and it does not crash. I have established 1800 SVRCONN channels before running out of resources ... at client XP, jejeje
So, the strange error message will stay, but my error is gone.
Thanks for your teaching, all of you and also (+) mr Ramires.
Shall start a "tail -f AMQERR01.log" always !!! (on Linux, jejeje)
Sebastian.
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