Ram Usage


 
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Operating Systems Linux Ram Usage
# 1  
Old 02-23-2010
Ram Usage

Hi
one of our applications that runs on our Linux server leaks memory resulting in Ram that was used by the program not being released back to the operating system once a file has been processed. the result is over a very short period virtual all the memory has been used. an example currently
Code:
Mem:  32434444k total, 29335644k used,  3098800k free,  1122280k buffers
Swap: 16779884k total,      508k used, 16779376k free,  7974532k cached

Question: Is there a way of reseting the Ram without rebooting the server?

Thanks
Treds

Last edited by zaxxon; 02-23-2010 at 12:30 PM.. Reason: use code tags please, ty
# 2  
Old 02-23-2010
Can be ipcs, ipcrm command help you.
# 3  
Old 02-23-2010
Can you post the output of
Code:
free -m

please?

It is possible to flush caches without a reboot but afaik not working segments.
# 4  
Old 02-23-2010
Actually, please post the output of this:

Code:
vmstat -s -S M | egrep "mem|swap"

Also, realize that Linux, as well as many other operating systems, will cache files read in memory for performance reasons. Should another application require more memory, that file cache will be discarded to provide adequate space for the new application.

If you are swapping in the few hundred KB, don't worry. That is fine.
# 5  
Old 02-23-2010
Ram

Code:
# vmstat -s -S M | egrep "mem|swap" 
31674 M total memory
29436 M used memory
15296 M active memory
12051 M inactive memory
2237 M free memory
1106 M buffer memory
6902 M swap cache
16386 M total swap
0 M used swap
16386 M free swap
0 pages swapped in
1 pages swapped out

# 6  
Old 02-23-2010
treds,

You have plenty of memory available. You are not swapping and have plenty for applications.
# 7  
Old 02-24-2010
ram

Code:
Yes there is still plenty of memory but going back to my original question
the Ram just keeps being taken and not released due to a issue with one of our applications. The only way to get all the ram back as free is to reboot the server,
which is something i don't want to do. is there any way to reset without rebooting?
thanks
Treds

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