Re: Postgresql Memory Problem

scott.marlowe wrote:

>On Mon, 20 Oct 2003, dotaku wrote:
>
>
>
>>Hi all..
>>
>>i've got a problem with the memory that postgresql 7.3.2 used in RedHat 9.
>>When the memory usage reached 80% or more of the total memory in the
>>system..
>>the memory just keep stuck there..The thing did not reduce bt itself...
>>
>>Then i decided to stop the postgresql service. But ...the memory that
>>postgresql used still stuck...I used top to check the memory...
>>
>>The only way to solved it now...is via rebooting the machine..But that
>>is ridiculous..
>>Need Help....maybe i miss configured the postgresql.conf.
>>
>>But give me something to tinker with..
>>
>>
>
>Are you talking about something like this:
>
>Mem: 1543980K av, 1538248K used, 5732K free, 266768K shrd, 36064K buff
>Swap: 2048208K av, 194532K used, 1853676K free 802612K cached
>
>Where I'm only showing 5732k free, but 802612k cached? That's normal.
>The linux kernel is just using the spare memory for file caching until
>something tries to allocate a big chunk of memory, then it will give it
>back. That's normal operation.
>
>Or is it something else?
>
>
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Thanks...but can I flush a postgreql server unused memory after stopping
it. The problem that i had is that, even after stopping all postgresql
services...the used memory is still more than 80% of the total RAM..

any idea how to flush it. I've read somewhere about kflushd and
bdflushd. How to used it...Both are kernel related. Is there any user
space program that can kick it.

--azman---