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	Author	Topic: increase share memory (Read 1428 times)
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Odi

New Member

Posts: 3

Re: increase share memory

« Reply #3 on: January 25, 2007, 06:04:48 AM »

To check the shared memory usage "ipcs -m


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wwells

Full Member

Posts: 18

Re: increase share memory

« Reply #2 on: November 14, 2006, 01:29:25 AM »

Unless you have some really good reason, definitely update your system. At the very least apply all the security fixes!

That said, "shared memory" is part of the interprocess communication facilities. Shared memory segments are listed with the ipcs command. Shared memory segments can be removed with the ipcrm command.

The majority of times I have seen problems with shared memory is when shared memory segments don't get cleaned up properly. This can be caused by poor application programming or by processes being killed improperly.

The ipc limits are hard limits in the OS. you can't change them.

See the chapter on shared memory in the "General Programming Concepts: Writing and Debugging Programs" book.


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webmaster

Administrator
Jr. Member

Posts: 5

Re: increase share memory

« Reply #1 on: November 13, 2006, 11:13:54 AM »

First you should look at getting your AIX system updated.

In my experience shared_memory errors are application errors. However, your AIX version is so down_level (and AIX 5.1 is no longer supported, or perhaps only with fee charges til 31 December) I must suggest that you review your current setup for longetivity.

As it is an HACMP supported application I assume that it is important to have proper support.

p.s. much of the HACMP software will also update when you download and install the fixes.

See pic for an overview of packages and dates released. The link you need is:
http://www14.software.ibm.com/webapp/set2/abl/bundle?release=51 (http://www14.software.ibm.com/webapp/set2/abl/bundle?release=51)
(http://felt-1.demon.nl/pictures/5100_ml.png)


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mahdi

Jr. Member

Posts: 6

increase share memory

« on: November 13, 2006, 10:04:22 AM »

We have IBM server with aix 5.1 ML4 installed and hacmp clustering
some application sometimes return share memory error , but i can not find any information on process or memory usage with ( ps, vmstat and svmon ) that shows where is the problem ,and now i want to know how can i check share memory in os level and which command and maybe need to increase share memory and how?

regards,
mahdi