Re: Curious about dead rows.

[Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org>]

Jean-David Beyer wrote:

> How do I reset the counters in pg_stat_database and pg_stat_all_tables?
> I tried just restarting postgres, but it seems to be saved in the database,
> not just in the RAM of the server.

There is a function called pg_stat_reset() or some such.

> I suppose that blks_read and blks_hit are zero because there are 8 GBytes
> RAM on this machine and I give 2GBytes to shared_buffers = 253000 so that
> all sits in RAM.

Perhaps you have stats_block_level set to off?

> I know there have been rollbacks but I do a REINDEX, CLUSTER, and VACUUM
> ANALYZE before starting the inserts in question.

You do all three on the same tables?  That seems pretty pointless.  A
sole CLUSTER has the same effect.

> Do I need to do a VACUUM FULL ANALYZE instead?

No.

-- 
Alvaro Herrera       Valdivia, Chile   ICBM: S 39º 49' 18.1", W 73º 13' 56.4"
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