Re: Server load statistics

Torsten Bronger <bronger@physik.rwth-aachen.de> wrote:

> Hallöchen!
>
> I need statistics about the PG server load.  At the moment, I use
> for this
>
> SELECT tup_returned + tup_fetched + tup_inserted + tup_updated +
>      tup_deleted FROM pg_stat_database WHERE datname='mydb';
>
> However, the figures are absurdly high (> 100.000 rows per second).

Do you know, that you have to call pg_stat_reset() to restart all the
counters? And yes, a update is a delete and a insert. With your query
you get 3 rows per one singel update (tup_updated + tup_deleted +
tup_inserted). That's maybe not that what you expected.

Not to mention, every operation affects the system-tables, so one single
update, for instance, procude more than 3 table-operations.


Andreas
--
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