| From: | Achilleus Mantzios <achill(at)matrix(dot)gatewaynet(dot)com> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | pgsql-performance(at)postgresql(dot)org |
| Subject: | Re: An unresolved performance problem. |
| Date: | 2003-05-09 19:25:12 |
| Message-ID: | Pine.LNX.4.44.0305091721310.7304-100000@matrix.gatewaynet.com |
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| Thread: | |
| Lists: | pgsql-bugs pgsql-performance pgsql-sql |
I changed
*indexCorrelation = varCorrelation / nKeys;
to
*indexCorrelation = varCorrelation ;
and i got cost=28.88
and it beats every other index.
--
==================================================================
Achilleus Mantzios
S/W Engineer
IT dept
Dynacom Tankers Mngmt
Nikis 4, Glyfada
Athens 16610
Greece
tel: +30-210-8981112
fax: +30-210-8981877
email: achill(at)matrix(dot)gatewaynet(dot)com
mantzios(at)softlab(dot)ece(dot)ntua(dot)gr
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