Increase file-max and nofile limit in Linux for MQ Installation

Whereas putting in MQ 8 on Linux I got here throughout a warning to extend file-max and nofile.

WARNING: System settings for this technique don’t meet the suggestions for this product

See the log file at “/tmp/mqconfig.4192.log” for extra info

[root@localhost server]# cat /tmp/mqconfig.4192.log
mqconfig: V3.7 analyzing CentOS Linux launch 7.0.1406 (Core) settings for WebSphere MQ V8.0 System V Semaphores
semmsl     (sem:1) 250 semaphores                     IBM>=32           PASS
semmns     (sem:2) 0 of 32000 semaphores     (0%)   IBM>=4096         PASS
semopm     (sem:3) 32 operations                     IBM>=32           PASS
semmni     (sem:4) 0 of 128 units              (0%)   IBM>=128         PASS
System V Shared Reminiscence
shmmax             4294967295 bytes                   IBM>=268435456   PASS
shmmni             5 of 4096 units             (0%)   IBM>=4096         PASS
shmall             3424 of 268435456 pages   (0%)   IBM>=2097152     PASS
System Settings
file-max           5568 of 201932 information       (2%)   IBM>=524288       FAIL
Present Person Limits (root)
nofile       (-Hn) 4096 information                         IBM>=10240       FAIL
nofile       (-Sn) 1024 information                         IBM>=10240       FAIL
nproc       (-Hu) 0 of 15891 processes       (0%)   IBM>=4096         PASS
nproc       (-Su) 0 of 15891 processes       (0%)   IBM>=4096         PASS

Are you experiencing the identical downside?

IBM MQ recommends a minimal configuration as follows: –

  • fs.file-max = 524288
  • no file = 10240

Configure fs.file-max

  • Again up /and many others/sysctl.conf
  • Open /and many others/sysctl.conf with a textual content editor and add the next
fs.file-max = 524288
  • Save the file. To load this setting instantly, execute sysctl –p command in any other case it will likely be loaded on the following system reboot.
sysctl –p

Don’t configure a file

  • Again up /and many others/safety/limits.conf
  • Open /and many others/safety/limits.conf with a textual content editor and the next
mqm             arduous   nofile         10240
mqm             comfortable   nofile         10240
  • Save the file.

Restart the MQ set up and try to be high-quality.

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