From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
---|---|
To: | ilejn(at)yandex(dot)ru |
Cc: | pgsql-general(at)postgresql(dot)org |
Subject: | Re: slow parsing of queries with joins |
Date: | 2005-06-15 15:11:49 |
Message-ID: | 3171.1118848309@sss.pgh.pa.us |
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Lists: | pgsql-general |
"Ilja Golshtein" <ilejn(at)yandex(dot)ru> writes:
> I faced with the fact PG parses some of my queries very slowly.
> I mean VERY VERY slowly (for example, MS SQL is about 50 times
> faster here).
> I used this script for small investigation.
Seems to be mostly fixed already. Using your script, I get
PG 8.0.3:
0:01.81 for 50 iterations
0:08.30 for 100 iterations
0:23.59 for 150 iterations
0:53.45 for 200 iterations
1:41.43 for 250 iterations
2:58.99 for 300 iterations
CVS tip:
0:00.10 for 50 iterations
0:00.23 for 100 iterations
0:00.70 for 150 iterations
0:01.22 for 200 iterations
0:01.58 for 250 iterations
0:02.36 for 300 iterations
regards, tom lane
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