Justin Graf wrote: > On 6/22/2010 4:31 AM, Grzegorz Jaśkiewicz wrote: > >> Would moving WAL dir to separate disk help potentially ? >> >> > > Yes it can have a big impact. WAL on a separate spindle will make a HUGE difference in performance. TPS rates frequently double OR BETTER with WAL on a dedicated spindle.
Strongly recommended. Be aware that you must pay CLOSE ATTENTION to your backup strategy if WAL is on a different physical disk. Snapshotting the data disk where WAL is on a separate spindle and backing it up **WILL NOT WORK** and **WILL** result in an non-restoreable backup. The manual discusses this but it's easy to miss.... don't or you'll get a NASTY surprise if something goes wrong..... -- Karl
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