On Sun, April 25, 2010 20:55, Tom Lane wrote: > > That seems weird. Why do most of the runs show primary and standby > as having comparable speed, but a few show the standby as much slower? > The parameters for those runs don't seem obviously different from cases > where it's fast. I think there might have been something else going on > on the standby during those runs. Or do you think those represent > cases where the mystery slowdown event happened? >
the strange case is the scale 100 standby's slow start, followed by a steady increase during -c 1, then -c 10, and finally getting up to speed with -c 20 (and up). And these slow-but-growing standby series are interspersed with normal (high-speed) primary series. I'll try to repeat this pattern on other hardware; although if my tests were run with faulty hardware I wouldn't know how/why that would give the above effect (such a 'regular aberration'). testing is more difficult than I thought... Erik Rijkers -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
