| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | "George Pavlov" <gpavlov(at)mynewplace(dot)com> |
| Cc: | "Joshua D(dot) Drake" <jd(at)commandprompt(dot)com>, pgsql-general(at)postgresql(dot)org |
| Subject: | Re: index vs. seq scan choice? |
| Date: | 2007-06-07 22:33:48 |
| Message-ID: | 415.1181255628@sss.pgh.pa.us |
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| Lists: | pgsql-general pgsql-www |
"George Pavlov" <gpavlov(at)mynewplace(dot)com> writes:
>> From: Joshua D. Drake [mailto:jd(at)commandprompt(dot)com]
>> In those rare cases wouldn't it make more sense to just set
>> enable_seqscan to off; run query; set enable_seqscan to on;
> 1. these cases are not that rare (to me);
It strikes me that you probably need to adjust the planner cost
parameters to reflect reality on your system. Usually dropping
random_page_cost is the way to bias the thing more in favor of
index scans.
regards, tom lane
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