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On Apr 5, 2007, at 8:21 AM, Jeff Frost wrote:
I noticed this behavior on the last Areca based 8 disk Raptor system I built. Putting pg_xlog on a separate partition on the same logical volume was faster than putting it on the large volume. It was also faster to have 8xRAID10 for OS+data+pg_xlog vs 6xRAID10 for data and 2xRAID1 for pg_xlog+OS. Your workload may vary, but it's definitely worth testing. The system in question had 1GB BBU.
Thanks for sharing your findings - I'll definitely try that config out. -jay
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