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Free memory from unused processes
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11-17-2009 10:48 PM
11-17-2009 10:48 PM
Is there any way to free the memory allocated for processes that are not running?
Thanks in advance
Solved! Go to Solution.
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11-17-2009 10:53 PM
11-17-2009 10:53 PM
Re: Free memory from unused processes
Re: Free memory from unused processes
Gracefully stop the process.
Aneesh
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11-17-2009 11:04 PM
11-17-2009 11:04 PM
Re: Free memory from unused processes
Re: Free memory from unused processes
I have a lot of oracle processes (about 100), and im sure some of them are idle. But there is no way to know which.
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11-17-2009 11:39 PM
11-17-2009 11:39 PM
Re: Free memory from unused processes
Re: Free memory from unused processes
What do you mean by "free"? The kernel will page out unused pages automatically.
The kernel won't give up the swap space.
What are you trying to solve?
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11-18-2009 12:01 AM
11-18-2009 12:01 AM
Re: Free memory from unused processes
Re: Free memory from unused processes
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11-18-2009 10:32 AM
11-18-2009 10:32 AM
Re: Free memory from unused processes
Re: Free memory from unused processes
Is there any way to claim back the memory occupied by them? or the OS automatically claims back it?
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11-18-2009 10:35 AM
11-18-2009 10:35 AM
Re: Free memory from unused processes
Re: Free memory from unused processes
>>I have a lot of oracle processes running in my server, and i suspect that some of them are idle.
My suggestion is don`t try to disturb any of the oracle process from OS ,it can make your database inconsistent .
You can advise you DBA to enable session timeout / kill snipped session to release the idle resources.
Aneesh
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11-21-2009 08:41 AM
11-21-2009 08:41 AM
Re: Free memory from unused processes
Re: Free memory from unused processes
Yes, the kernel will reclaim memory (unless locked) but not swap.
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11-21-2009 09:53 AM
11-21-2009 09:53 AM
SolutionProcesses that are waiting for some event will be lowered in priority and eventually be deactivated automatically and paged out to your swap area but only if your system is running short of RAM. Note that if you are trying to solve error messages regarding out of memory, this is very likely not related to memory usage but instead due to limits set in your kernel that need to be increased, or perhaps increasing swap space. What if the output of:
swapinfo -tam
Bill Hassell, sysadmin
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11-21-2009 11:03 AM
11-21-2009 11:03 AM
Re: Free memory from unused processes
Re: Free memory from unused processes
I wouldn't exactly say that. It could be sleeping or waiting. My definition of running is using the CPU.
All you can tell if it shows in ps(1), is he's not dead, Jim. :-)
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11-21-2009 11:12 AM
11-21-2009 11:12 AM
Re: Free memory from unused processes
Re: Free memory from unused processes
> Dennis: All you can tell if it shows in ps(1), is he's not dead, Jim. :-)
While I'm sure you weren't addressing me :-) I would add that zombies show in 'ps' as "defunct". Of course, they don't have any user or kernel space allocated, and they are doomed to await their Grim Reaper.
Regards!
...JRF...
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