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From: Divakar Singh <dpsmails@yahoo.com>
To: Marti Raudsepp <marti@juffo.org>
Cc: pgsql-performance@postgresql.org
Subject: Re: Insert performance with composite index
Date: Mon, 1 Nov 2010 05:56:13 -0700 (PDT)
Message-ID: <235610.98703.qm@web65413.mail.ac4.yahoo.com> (raw)
In-Reply-To: <AANLkTinv8-YmUA+QJOu83uuT=Mw9pxbTKZqreGx-_3y2@mail.gmail.com>
References: <293254.80548.qm@web65413.mail.ac4.yahoo.com>
	<AANLkTinv8-YmUA+QJOu83uuT=Mw9pxbTKZqreGx-_3y2@mail.gmail.com>

Hi Marti,
Thanks for your tips. i will try those.
I am on Solaris Sparc 5.10

 Best Regards,
Divakar




________________________________
From: Marti Raudsepp <marti@juffo.org>
To: Divakar Singh <dpsmails@yahoo.com>
Cc: pgsql-performance@postgresql.org
Sent: Mon, November 1, 2010 6:23:17 PM
Subject: Re: [PERFORM] Insert performance with composite index

On Mon, Nov 1, 2010 at 14:49, Divakar Singh <dpsmails@yahoo.com> wrote:
> I am trying to tune my libpq program for insert performance.
> When I tried inserting 1M rows into a table with a Primary Key, it took
> almost 62 seconds.
> After adding a composite index of 2 columns, the performance degrades to 125
> seconds.

This sounds a lot like the bottleneck I was hitting. What Linux kernel
version are you running?

If it's 2.6.33 or later, see:
http://wiki.postgresql.org/wiki/Tuning_Your_PostgreSQL_Server#wal_sync_method_wal_buffers

http://archives.postgresql.org/pgsql-performance/2010-10/msg00602.php

Regards,
Marti



      

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