From: Robert Lor <Robert.Lor@Sun.COM>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Juan Casero (FL FLC) <Juan.Casero@wholefoods.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: Sun Fire T2000 and PostgreSQL 8.1.3
Date: Wed, 05 Apr 2006 20:41:16 -0700
Message-ID: <44348DDC.60505@sun.com> (raw)
In-Reply-To: <12500.1144263844@sss.pgh.pa.us>
References: <7583B3F1891CC0429FA4A44952AA539C66FA2C@wfm-exchprd2.wfm.pvt>
<12500.1144263844@sss.pgh.pa.us>
Tom is right. Unless your workload can generate lots of simultaneous
queries, you will not reap the full benefit of the Sun Fire T2000
system. I have tested 8.1.3 with an OLTP workload on an 8 cores system.
With 1500-2000 client connections, the CPU was only about 30% utilized.
The UltraSPARC T1 processor was designed for throughput with many cores
running at lower frequency (1-1.2 GHz) to reduce power consumption. To
speed up a single big query, you'd be better off with a parallelize DB
or an Opteron system with higher clock speed like this one
http://www.sun.com/servers/entry/x4200/
Regards,
-Robert
Tom Lane wrote:
>"Juan Casero \(FL FLC\)" <Juan.Casero@wholefoods.com> writes:
>
>
>>... This box has a single Ultrasparc T1 cpu with six execution
>>piplelines that can each handle 4 threads. With the Unix top utility
>>the postgresql server appears to bounce around between the available
>>threads on the system.
>>
>>
>
>Try sending it more than one query at a time? If you're testing with
>just one client connection issuing queries, that's about what I'd expect.
>
> regards, tom lane
>
>---------------------------(end of broadcast)---------------------------
>TIP 6: explain analyze is your friend
>
>
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To: pgsql-performance@postgresql.org
Cc: Robert.Lor@Sun.COM, tgl@sss.pgh.pa.us, Juan.Casero@wholefoods.com
Subject: Re: Sun Fire T2000 and PostgreSQL 8.1.3
In-Reply-To: <44348DDC.60505@sun.com>
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