>>>>> "TL" == Tom Lane <tgl@sss.pgh.pa.us> writes:
TL> Just nice'ing the VACUUM process is likely to be counterproductive
TL> because of locking issues (priority inversion). Though if anyone cares
TL> to try it on a heavily-loaded system, I'd be interested to hear the
TL> results...
tried it once. didn't make much difference except that vacuum took
longer than normal. i didn't see any deadlocks.
i actually figured out what my main problem was. vacuum every 6 hours
on my two busiest tables was taking longer than 6 hours when we were
very busy...
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