Is there a way to release the leaked memory without reboot the system?

[Daneil Goodman]

Thanks for your suggestion. I do told users to improve their code to avoid
this issue. But some did not do very well. Besides, new users joined in and
some of them created this issue again. This is reason I would like to do
something from system side. To clean up swap space, I found the simply way
is to swapoff and swapon  again.

Cheers,
Goodman

On Thu, Jun 26, 2008 at 8:52 AM, Andrew Bacchi <bacchi at rpi.edu> wrote:

> I haven't seen any replies to this question, so I'll offer my suggestion.
>
> I'm unaware of any way to release memory other than a reboot of the system,
> however I don't have any experience with a clustered system such as yours.
>  I would think that best solution is to improve the program that's causing
> your memory leak.  If it's written in house, you should rewrite the code to
> release memory.  If the program is purchased, then call the publisher and
> get them to improve it.
>
> Most programmers are aware of memory leakage and are writing improved code
> these days.  I hope this helps.
>
>
> Daneil Goodman wrote:
>
>> Hi There,
>>
>> I have a Dell PoweEdge 1950 cluster running RHEL AS 4. The nodes are
>> internally connected using InfiniBand switch to let users to run the
>> parallel jobs. The cluster has serious memory leak issue which left a lot
>> of
>> RAM and swap space behind after the job finished. I usually reboot the
>> nodes
>> to clean up the garbage after I confirmed there is no job running on these
>> nodes. But recently I found sometimes other user's job could be killed
>> when
>> I reboot the nodes although the killed job is running on other nodes. This
>> weird issue bothered me a lot. Therefore, I would like to find a way to
>> release the leaked memory and clean up the swap space without rebooting
>> the
>> system. Can someone give me a suggestion?
>>
>> Thanks a lot,
>> Goodman
>>
>>
>
> --
> veritatas simplex oratio est
>       -Seneca
>
> Andrew Bacchi
> Systems Programmer
> Rensselaer Polytechnic Institute
> phone: 518.276.6415  fax: 518.276.2809
>
> http://www.rpi.edu/~bacchi/ <http://www.rpi.edu/%7Ebacchi/>
>
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