From: Andy <frum@ar-sd.net>
To: Christopher Kings-Lynne <chriskl@familyhealth.com.au>
Cc: pgsql-performance@postgresql.org
Subject: Re: Server misconfiguration???
Date: Mon, 10 Oct 2005 12:42:43 +0300
Message-ID: <00dc01c5cd7e$f6f127a0$0b00a8c0@forge> (raw)
References: <006f01c5cd76$2b166490$0b00a8c0@forge>
<434A2C8B.3040803@familyhealth.com.au>
Yes you're right it really bosst a little.
I want to improve the system performance. Are there any more tipps?
On this server runs only a webserver with php application which uses postgre
Db. Should I give more memory to postgre? From what I noticed this is the
most memory "needing" service from this system.
Andy.
----- Original Message -----
From: "Christopher Kings-Lynne" <chriskl@familyhealth.com.au>
To: "Andy" <frum@ar-sd.net>
Cc: <pgsql-performance@postgresql.org>
Sent: Monday, October 10, 2005 11:55 AM
Subject: Re: [PERFORM] Server misconfiguration???
>A lot of them are too large. Try:
>
> Andy wrote:
>> Hi to all,
>> I have the following configuration:
>> Dual Xeon 2.8 Ghz, 1G RAM and postgre 8.0.3 installed.
>> Modified configuration parameters:
>> max_connections = 100
>> shared_buffers = 64000 # 500MB = 500 x 1024 x 1024 / (8 x 1024) (8KB)
>
> shared_buffers = 10000
>
>> work_mem = 51200 # 50MB = 50 x 1024 KB
>
> work_mem = 4096
>
>> maintenance_work_mem = 102400 # 50MB = 100 x 1024 KB
>> checkpoint_segments = 10
>> effective_cache_size = 25600 # 200MB = 50 x 1024 / 8
>> client_min_messages = notice log_min_messages = notice
>> log_min_duration_statement = 2000
>> I get the feeling the server is somehow missconfigured or it does not
>> work at full parameter. If I look at memory allocation, it never goes
>> over 250MB whatever I do with the database. The kernel shmmax is set to
>> 600MB. Database Size is around 550MB.
>
> That's because you have work_mem set massively high. Remember that's PER
> SORT. If you have 10 queries running each doing 3 sorts that's 30x the
> work_mem right there.
>
> Chris
>
>
>
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To: pgsql-performance@postgresql.org
Cc: frum@ar-sd.net, chriskl@familyhealth.com.au
Subject: Re: Server misconfiguration???
In-Reply-To: <00dc01c5cd7e$f6f127a0$0b00a8c0@forge>
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