webstd.design Tue, 12/16/2008 - 05:20
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Where I can read about requiement that define these threshold parameters?

chrisluven Wed, 07/29/2009 - 01:41
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Hi together,

my publisher has a swap-partition-usage of 91%.

Is this a normal value? Or is it too high?

What should I do to reduce the swap partition usage?

My subscriber has a usage of 24% of the swap partition... so there's a big difference between the two systems although they are absolutely identical equipped.

kind regards


KonradStepniewski Wed, 07/29/2009 - 05:58
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Some time ago I opened ticket with TAC about swap memory usaged on CUCM 6.1. Below you can read full answer (just to mention I had no real problem with CM only was courius why it's happening):

I don't see any real problem however... It's true from the graphs you

showed that the swap memory usage is increasing but this is perfectly

normal on a linux system. My question would be : do you see any issues

with the callmanager or is it just a question of why the swap memory is


If it's the latter, that's the way linux memory management works. An

application (like ccm, Tomcat, ...) is asking memory from the OS and the

OS will allocate some pages for this application. If, after a while, the

OS sees that this application is not actively using part of this

allocated memory it will swap this part of memory to disk (swap memory)

so it can free part of the real memory.

On a CallManager this is happening so the real memory can be used to

store the configuration (which is normally on disk) for faster usage.

I can see also from the 'show status' command that you sent that the

memory usage of your CallManager is fine : you have 2Gb installed, more

or less 1.2Gb is in use and around 800Mb is available. This looks very

healthy, nothing to worry about.

So, the fact that you see the swap memory increasing is nothing bad,

it's just normal operation of the linux memory management.

Please let me know if you have any further questions regarding this.

chrisluven Wed, 07/29/2009 - 06:35
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Thanks for your reply!

I will have a look if the swap partition cleans itself or if it is growing to 100% usage....

So i think at the moment i do not have to worry about that.




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