Re: Used Memory

But as long as the memory is in the cache my database became much slower.
What could probably be the cause of this? But When I restarted the database
is back to normal processing.
-----Original Message-----
From: Jens-Wolfhard Schicke [mailto:ml+pgsql-performance@asco.de]
Sent: Friday, October 21, 2005 7:23 AM
To: Christian Paul B. Cosinas; pgsql-performance@postgresql.org
Subject: Re: [PERFORM] Used Memory

--On Freitag, Oktober 21, 2005 03:40:47 +0000 "Christian Paul B. Cosinas"
<cpc@cybees.com> wrote:
> I am having a confusion to the memory handling of postgreSQL.
> I rebooted my Server which is a PostgreSQL 8.0 Running on Redhat 9,
> which is a Dual Xeon Server and 6 gig of memory.
>
> Of course there is not much memory still used since it is just restarted.
>
> But after a number of access to the tables the memory is being used
> and it is not being free up. Actually after this access to the
> database and the server is just idle
>
> The memory is still used up. I am monitoring this using the "free"
> command which gives me about 5.5 gig of used memory and the rest free.
I suppose you looked at the top row of the free output?

Because there the disk-cache is counted as "used"... Have a look at the
second row where buffers are counted as free, which they more or less are.

> Is there something that I should do to minimize and free up the used
> memory?
No, the buffers make your database faster because they reduce direct disk
access

> I choose Polesoft Lockspam to fight spam, and you?
> http://www.polesoft.com/refer.html
I don't :)

Mit freundlichem Gruß,
Jens Schicke
--
Jens Schicke              j.schicke@asco.de
asco GmbH              http://www.asco.de
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38106 Braunschweig          Fax 0531/3906-400


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