Re: Btree indizes, FILLFACTOR, vacuum_freeze_min_age and CLUSTER

Philipp Marek wrote:

> A few days before we found the machine much slower, because of the autovacuum
> processes that were started automatically ["autovacuum: VACUUM ... (to prevent
> wraparound)"].
>
> After several days we killed that, and, as a quick workaround, changed
> "autovacuum_freeze_max_age" to 1G and restarted the server, which worked as
> before (and didn't ran the autovacuum processes).

Several days? How large is your vacuum_cost_delay and
autovacuum_vacuum_cost_delay parameters?

> As a next idea we changed the cluster/reindex script to set
> "vacuum_freeze_min_age=0" before the CLUSTER call, hoping that this would
> solve our transaction ID wraparound problem.

REINDEX? What are you doing REINDEX for?

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Alvaro Herrera http://www.CommandPrompt.com/
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