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Re: scalablility problem

From: Xiaoning Ding <dingxn(at)cse(dot)ohio-state(dot)edu>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: pgsql-performance(at)postgresql(dot)org
Subject: Re: scalablility problem
Date: 2007-03-30 21:38:57
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-performance
Thanks guys,

I update PG to 8.2.3. The results are much better now.
1 process :    0.94 second
2 processes: 1.32 seconds
4 processes: 2.03 seconds
8 processes: 2.54 seconds

Do you think they are good enough?
BTW where can I found some info on what 8.2.3 did to improve
scalability compared with pre 8.1 versions?


Tom Lane wrote:
> Xiaoning Ding <dingxn(at)cse(dot)ohio-state(dot)edu> writes:
>> When I run multiple TPC-H queries (DBT3) on  postgresql, I found the system
>> is not scalable.  My machine has 8GB memory, and 4 Xeon Dual Core processor
>> ( 8 cores in total). OS kernel is linux 2.6.9. Postgresql is 7.3.18.
> If you are not running PG 8.1 or later, it's really not worth your time
> to test this.  Multiprocessor scalability was hardly even on the radar
> in 7.3 days.
> 			regards, tom lane
> ---------------------------(end of broadcast)---------------------------
> TIP 6: explain analyze is your friend

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