Matthew T. O'Connor wrote:
Glen Parker wrote:
I would like a way to run the autovacuum daemon on demand periodically. Every night at 2 AM, for example.

Anybody know if this is possible?  If not, it's a feature request :-)

Autovacuum can be enabled / disabled on the fly using the GUC settings. Perhaps you can write a cron script that runs at 2AM that enables autovac, and at 6AM (just a guess) disables it in the same fashion. I think that should work.

Would be curious to hear your results.

I thought it sounded like a good idea, but then...

SET autovacuum = on;
ERROR:  parameter "autovacuum" cannot be changed now

So then I thought maybe I could kind of fool it with...

SET autovacuum_vacuum_threshold = 99999999;
ERROR:  parameter "autovacuum_vacuum_threshold" cannot be changed now

Oh well.

-Glen

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