From: | Robert Vojta <vojta(at)ipex(dot)cz> |
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To: | Zeugswetter Andreas SB <ZeugswetterA(at)wien(dot)spardat(dot)at> |
Cc: | PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org> |
Subject: | Re: indexes and big tables |
Date: | 2001-07-27 12:57:13 |
Message-ID: | 20010727145713.L6382@ipex.cz |
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Thread: | |
Lists: | pgsql-hackers |
> The index is only used for the line= part of the where clause
> with your query. With many rows the "line=" is not selective enough
> to justify the index.
Hi,
I tried you suggestion about 'AND counterstamp > '2001-07-26 00:00:00.0' and
it works and index is used :) But, whole query run for 10 sec (was 30s) and
it's too much, I need about 1 sec. May I optimize my tables, queries or may I
upgrade something from my HW (duron 700, 384MB RAM, slow scsi disk :( )? I
do not want solution, some hint in which part may I focus and I will go through
documentation again, thank you very much.
Best regards,
Robert
--
_
|-| __ Robert Vojta <vojta-at-ipex.cz> -= Oo.oO =-
|=| [Ll] IPEX, s.r.o.
"^" ====`o
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