| From: | Andres Freund <andres(at)anarazel(dot)de> |
|---|---|
| To: | pgsql-performance(at)postgresql(dot)org |
| Cc: | "Cezariusz Marek" <cezariusz(dot)marek(at)comarch(dot)pl> |
| Subject: | Re: Slow cursor |
| Date: | 2011-10-26 13:10:46 |
| Message-ID: | 201110261510.46828.andres@anarazel.de |
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| Lists: | pgsql-performance |
Hi,
On Wednesday 26 Oct 2011 14:43:08 Cezariusz Marek wrote:
> Is there any known problem with slow cursors in PostgreSQL 8.4.5?
>
> I have a following query, which is slow (on my database it takes 11 seconds
> to execute), probably should be rewritten, but it doesn't matter here. The
> problem is, that in cursor, each fetch takes much longer (even few
> minutes!), while only the first one should be slow. Am I doing something
> wrong?
Does the problem persist if you play around with cursor_tuple_fraction?
Andres
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