Re: Degrading performance - Mailing list pgsql-performance

From Tom Lane
Subject Re: Degrading performance
Date
Msg-id 7850.1054560991@sss.pgh.pa.us
Whole thread Raw
In response to Degrading performance  ("Mindaugas Riauba" <mind@bi.lt>)
Responses Re: Degrading performance
List pgsql-performance
"Mindaugas Riauba" <mind@bi.lt> writes:
>   I have table with slowly degrading performance. Table is special is
> such way that all its rows are updated every 5 minutes (routers interfaces).
> vacuum does not help. vacuum full does but I'd like to avoid it.

VACUUM will do the trick, you just need to do it every five minutes or
so.  I suggest a cron job to vacuum just the one table.

> INFO:  Rel ifdata: Pages: 4887 --> 17; Tuple(s) moved: 776.
>         CPU 0.30s/0.35u sec elapsed 1.65 sec.

That says you waited way too long to vacuum --- over two hundred update
cycles, evidently.

            regards, tom lane

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