ASG
IBM
Zystems
Cressida
Icon
Netflexity
 
  MQSeries.net
Search  Search       Tech Exchange      Education      Certifications      Library      Info Center      SupportPacs      LinkedIn  Search  Search                                                                   FAQ  FAQ   Usergroups  Usergroups
 
Register  ::  Log in Log in to check your private messages
 
RSS Feed - WebSphere MQ Support RSS Feed - Message Broker Support

MQSeries.net Forum Index » General Discussion » Version 8.0 running out of shared memory pages

Post new topic  Reply to topic
 Version 8.0 running out of shared memory pages « View previous topic :: View next topic » 
Author Message
salem.muribi
PostPosted: Wed Oct 22, 2014 6:44 am    Post subject: Version 8.0 running out of shared memory pages Reply with quote

Novice

Joined: 05 Sep 2008
Posts: 14
Location: Chicago
Anyone else getting this? We are running on Red Hat 6.4 and have 9 queue managers up.

IPC settings are quite generous and have accounted for multiple queue managers on previous version 7 servers hosting this many queue managers without issue. At this point we have allocated 80 percent of the memory on the server as shared memory.

Wondering if either shared memory usage is much higher in 8.0 or if the pages somehow aren't being released due to a bug?



mqconfig: V3.7 analyzing Red Hat Enterprise Linux Server release 6.4
(Santiago) settings for WebSphere MQ V8.0

System V Semaphores
semmsl (sem:1) 500 semaphores IBM>=32 PASS
semmns (sem:2) 82 of 256000 semaphores (0%) IBM>=4096 PASS
semopm (sem:3) 250 operations IBM>=32 PASS
semmni (sem:4) 19 of 8192 sets (0%) IBM>=128 PASS

System V Shared Memory
shmmax 268435456 bytes IBM>=268435456 PASS
shmmni 215 of 12288 sets (1%) IBM>=4096 PASS
shmall 4169054 of 5242880 pages (79%) IBM>=2097152 WARN

System Settings
file-max 9280 of 3145728 files (0%) IBM>=524288 PASS

Current User Limits (taserv)
nofile (-Hn) 8192 files IBM>=10240 WARN
nofile (-Sn) 4096 files IBM>=10240 FAIL
nproc (-Hu) 140 of 16384 processes (0%) IBM>=4096 PASS
nproc (-Su) 140 of 16384 processes (0%) IBM>=4096 PASS
Back to top
View user's profile Send private message
exerk
PostPosted: Wed Oct 22, 2014 7:13 am    Post subject: Reply with quote

Jedi Council

Joined: 02 Nov 2006
Posts: 6339
The obvious ones that stand out are:
Quote:
System V Shared Memory
shmall 4169054 of 5242880 pages (79%) IBM>=2097152 WARN

Current User Limits (taserv)
nofile (-Hn) 8192 files IBM>=10240 WARN
nofile (-Sn) 4096 files IBM>=10240 FAIL

What about upping those values and seeing whether the issue disappears?
_________________
It's puzzling, I don't think I've ever seen anything quite like this before...and it's hard to soar like an eagle when you're surrounded by turkeys.
Back to top
View user's profile Send private message
Andyh
PostPosted: Wed Oct 22, 2014 11:20 am    Post subject: Reply with quote

Master

Joined: 29 Jul 2010
Posts: 237
Shared memory use on MQ V8 isn't expected to be significantly different than in MQ V7. If you can demonstrate a significant increase in shared memory use for an equivalent V8/V7 configuration you should raise a PMR reporting the issue.
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic  Reply to topic Page 1 of 1

MQSeries.net Forum Index » General Discussion » Version 8.0 running out of shared memory pages
Jump to:  



You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
Protected by Anti-Spam ACP
  
 


Theme by Dustin Baccetti
Powered by phpBB © 2001, 2002 phpBB Group

Copyright © MQSeries.net. All rights reserved.