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From: Craig James <craig_james@emolecules.com>
To: Joshua D. Drake <jd@commandprompt.com>
To: pgsql-performance@postgresql.org
Subject: Re: Benchmark: Dell/Perc 6, 8 disk RAID 10
Date: Thu, 13 Mar 2008 07:54:34 -0700
Message-ID: <47D9402A.3050903@emolecules.com> (raw)
In-Reply-To: <20080312225554.52f6275b@commandprompt.com>
References: <f966c2ee0803052142l6a105678jfe2da92a0d9371@mail.gmail.com>
	<f966c2ee0803052143k4570d771o6c300647d3b987d@mail.gmail.com>
	<20080306060829.GA21084@a-kretschmer.de>
	<bf54be870803052215y5bb56235k5ea05ada1d701022@mail.gmail.com>
	<47CF8EA6.8070503@mark.mielke.cc>
	<20080306063643.GB21084@a-kretschmer.de>
	<f966c2ee0803052243w723e2866gbfc37128620d1c6d@mail.gmail.com>
	<B94D3180-BB72-43EB-BA1E-90CF53705386@fastcrypt.com>
	<f966c2ee0803060358k14dd7374h8ef3f4ca0818b04@mail.gmail.com>
	<3E9C3A51-C28E-4B75-9739-E344DAC72880@fastcrypt.com>
	<f966c2ee0803060443j3d9c1b66x5f59e00d084e841c@mail.gmail.com>
	<Pine.GSO.4.64.0803060813570.11897@westnet.com>
	<47D00DB2.7040007@emolecules.com>
	<18451.1204824562@sss.pgh.pa.us>
	<47D0AFC1.5070305@emolecules.com>
	<47D8B3B6.3010606@emolecules.com>
	<20080312225554.52f6275b@commandprompt.com>

Joshua D. Drake wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> 
> On Wed, 12 Mar 2008 21:55:18 -0700
> Craig James <craig_james@emolecules.com> wrote:
> 
> 
>> Diffs from original configuration:
>>
>> max_connections = 1000
>> shared_buffers = 400MB
>> work_mem = 256MB
>> max_fsm_pages = 1000000
>> max_fsm_relations = 5000
>> wal_buffers = 256kB
>> effective_cache_size = 4GB
> 
> I didn't see which OS but I assume linux. I didn't see postgresql so I
> assume 8.3.

Right on both counts.

> wal_sync_method = open_sync
> checkpoint_segments = 30
> shared_buffers = 2000MB
> asyncrhonous_commit = off (sp?)
> 
> Try again.

Nice improvement!  About 25% increase in TPS:

$ pgbench -c 10 -t 10000 -v test -U test
starting vacuum...end.
starting vacuum accounts...end.
transaction type: TPC-B (sort of)
scaling factor: 1
number of clients: 10
number of transactions per client: 10000
number of transactions actually processed: 100000/100000
tps = 3423.636423 (including connections establishing)
tps = 3425.957521 (excluding connections establishing)

For reference, here are the results before your suggested changes:

$ pgbench -c 10 -t 10000 -v test -U test
starting vacuum...end.
starting vacuum accounts...end.
transaction type: TPC-B (sort of)
scaling factor: 1
number of clients: 10
number of transactions per client: 10000
number of transactions actually processed: 100000/100000
tps = 2786.377933 (including connections establishing)
tps = 2787.888209 (excluding connections establishing)

Thanks!
Craig



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