| From: | "Kevin Grittner" <Kevin(dot)Grittner(at)wicourts(dot)gov> |
|---|---|
| To: | <wangqi(at)edgesoft(dot)cn>,<pgsql-admin(at)postgresql(dot)org> |
| Subject: | Re: a very slow SQL |
| Date: | 2012-06-25 10:56:42 |
| Message-ID: | 4FE7FD9A0200002500048A5A@gw.wicourts.gov |
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| Thread: | |
| Lists: | pgsql-admin |
wangqi wrote:
> An SQL execution is very slow.
> What can I do to makes it faster。
Without knowing more about the version of PostgreSQL, your PostgreSQL
configuration, your schema (including indexes), and your hardware,
it's hard to give advice.
http://wiki.postgresql.org/wiki/SlowQueryQuestions
A wild guess on the evidence we have is that you might benefit from
an index on MCL.ctid if you don't already have one.
-Kevin
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