On Tuesday 27 January 2009 13:13:32 you wrote: > On Tue, 2009-01-27 at 12:53 -0500, Gabi Julien wrote: > > I have merged the last hot standby patch (v9g) to 8.4 devel and I am > > pleased with the experience. This is promising stuff. Perhaps it is a bit > > too soon to ask questions here but here it is: > > > > 1. Speed of recovery > > > > With a archive_timeout of 60 seconds, it can take about 4 minutes before > > I see the reflected changes in the replica. This is normal since, in > > addition to the WAL log shipping, it takes more time to do the recovery > > itself. Still, is there any way besides the archive_timeout config option > > to speed up the recovery of WAL logs on the hot standby? > > Is the recovery itself the bottleneck? Yes, the logs are shipped every minute but the recevory is 3 or 4 times longer. > > There's a performance improvement submitted here: > http://archives.postgresql.org/message-id/a778a7260810280033n43f70d36x8c437 >eacf9a5461e@xxxxxxxxxxxxxx > > But I haven't been following the development of it closely, so you'll > have to read the thread to see whether it will meet your needs or not. Thanks I will take a look at it. Also, I came across the record log shipping feature too in my research: http://www.postgresql.org/docs/current/static/warm-standby.html#WARM-STANDBY-RECORD Could this help? If the logs are smaller then I could potentially afford shipping then at a higher frequency. > > Regards, > Jeff Davis ------------------------------------------------------- -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
