On Tue, 19 Jul 2005 12:54:22 -0400
Tom Lane <tgl@sss.pgh.pa.us> wrote:
> Hmm, I hadn't thought about the possible impact of multiple concurrent
> vacuums. Is the problem caused by that, or has performance already gone
> into the tank by the time the cron-driven vacuums are taking long enough
> to overlap?
Don't know just yet. When I run the vacuums manually on a healthy system on
741, they take less than 30 seconds. I've stopped the cron vacuum and canceled
all the outstanding vacuum processes, but the 803 is still struggling (1/2 hour
later).
I'll re-start the database, vacuum full analyze and restart the runs without the
cron vacuum running.
Cheers,
Rob