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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Daniel van Ham Colchete <daniel.colchete@gmail.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: New to PostgreSQL, performance considerations
Date: Tue, 12 Dec 2006 12:32:31 -0500
Message-ID: <5202.1165944751@sss.pgh.pa.us> (raw)
In-Reply-To: <8a0c7af10612120858g1b1b4454x518a3ed609324627@mail.gmail.com>
References: <60psaq5t94.fsf@dba2.int.libertyrms.com>
	<20061211173105.GH16692@mathom.us>
	<E1Gtplp-0004Ka-GM@elasmtp-junco.atl.sa.earthlink.net>
	<20061211184726.GI16692@mathom.us>
	<E1GtrB8-0005rw-Iu@elasmtp-kukur.atl.sa.earthlink.net>
	<457DA782.3060506@modgraph-usa.com>
	<8a0c7af10612111422x6bdcc0c2p7cbfeb5a7b0e0374@mail.gmail.com>
	<20061212013706.GM16692@mathom.us>
	<8a0c7af10612120110v34f7d3c3p6d872efabf97b922@mail.gmail.com>
	<20061212123131.GQ16692@mathom.us>
	<8a0c7af10612120858g1b1b4454x518a3ed609324627@mail.gmail.com>

"Daniel van Ham Colchete" <daniel.colchete@gmail.com> writes:
> I'm making some other tests here at another hardware (also Gentoo). I
> found out that PostgreSQL stops for a while if I change the -t
> parameter on bgbench from 600 to 1000 and I have ~150 tps instead of
> ~950tps.

> I don't know why PostgreSQL stoped, but it was longer than 5 seconds
> and my disk IO was comsuming 100% of my CPU time during this period.

Checkpoint?

			regards, tom lane



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