"Weber, Johann (ISS Kassel)" <jweber@xxxxxxx> writes: > Is this true for PostgreSQL (V 8.0 on ReadHat)? My tests do not show any > speed gained when placing pg_clog and pg_xlog on a different drive. The conventional wisdom is that it's a win to have pg_xlog on a drive by itself. The above is not that. pg_clog is more in the nature of data, and in any case you lose the advantage as soon as the drive handling pg_xlog has to move the head away from the current xlog file. Whether any particular test case would show an advantage is another question of course. In a heavy-write scenario I would think you could probably measure a win. regards, tom lane ---------------------------(end of broadcast)--------------------------- TIP 6: explain analyze is your friend
