Stef, > => 1. Make sure that the WAL files (pg_xlog) are on a seperate disk from the > => database files, either through mounting or symlinking. > > I'm not sure I understand how this helps?
It gives you better fsync write performance on a low-end disk setup. Otherwise, the disk is forced to do a hop-back-and-forth between the database and the xlog, resulting in much slower updates and thus the database tying up blocks of RAM longer -- particularly if your shared_buffers are set very low, which they will be. On RAID setups, this is unnecessary becuase the RAID takes care of disk access management. But on a low-end, 2-IDE-disk machine, you have to do it. -- -Josh Berkus Aglio Database Solutions San Francisco ---------------------------(end of broadcast)--------------------------- TIP 8: explain analyze is your friend
