From: | "Shridhar Daithankar" <shridhar_daithankar(at)persistent(dot)co(dot)in> |
---|---|
To: | pgsql-hackers(at)postgresql(dot)org, pgsql-general <pgsql-general(at)postgresql(dot)org>, pgsql-performance(at)postgresql(dot)org |
Subject: | Re: [pgsql-performance] Large databases, performance |
Date: | 2002-10-07 14:39:55 |
Message-ID: | 3DA1EA13.16626.10939155@localhost |
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Lists: | pgsql-general pgsql-hackers pgsql-performance pgsql-sql |
On 7 Oct 2002 at 10:30, Tom Lane wrote:
> "Shridhar Daithankar" <shridhar_daithankar(at)persistent(dot)co(dot)in> writes:
> > MySQL 3.23.52 with innodb transaction support:
>
> > 4 concurrent queries :- 257.36 ms
> > 40 concurrent queries :- 35.12 ms
>
> > Postgresql 7.2.2
>
> > 4 concurrent queries :- 257.43 ms
> > 40 concurrent queries :- 41.16 ms
>
> I find this pretty fishy. The extreme similarity of the 4-client
> numbers seems improbable, from what I know of the two databases.
> I suspect your numbers are mostly measuring some non-database-related
> overhead --- communications overhead, maybe?
I don't know but three numbers, postgresql/mysql/oracle all are 25x.xx ms. The
clients were on same machie as of server. So no real area to point at..
>
> > Only worry is database size. Postgresql is 111GB v/s 87 GB for mysql. All
> > numbers include indexes. This is really going to be a problem when things are
> > deployed. Any idea how can it be taken down?
>
> 7.3 should be a little bit better because of Manfred's work on reducing
> tuple header size --- if you create your tables WITHOUT OIDS, you should
> save 8 bytes per row compared to earlier releases.
Got it..
Bye
Shridhar
--
Sweater, n.: A garment worn by a child when its mother feels chilly.
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