On Thu, 2010-09-23 at 16:18 +0300, Heikki Linnakangas wrote: > There's a program called pg_readahead somewhere on pgfoundry by NTT that > will help if it's the single-threadedness of I/O. Before handing the WAL > file to the server, it scans it through and calls posix_fadvise for all > the blocks that it touches. When the server then replays it, the data > blocks are already being fetched by the OS, using the whole RAID array.
That sounds useful, thanks for the hint ! But couldn't this also be directly built in to WAL recovery process ? It would probably help a lot for recovering from a crash too. We did have recently a crash and it took hours to recover. I will try it out as soon as I get the time to set it up... [searching pgfoundry] Unfortunately I can't find it, and google is also not very helpful. Do you happen to have some links to it ? Cheers, Csaba. -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
