On Sat, Dec 24, 2011 at 8:13 PM, tuanhoanganh <hatuan05@xxxxxxxxx> wrote: > Thank for your information. > My postgresql config fsync default > #fsync = on # turns forced synchronization on or off > My RAID is ServeRAID M5015 SAS/SATA controller, in MegaRaid Store Manager it > show BBU Present = YES. > Does it have battery backed caching RAID controller? > Please help me, I am newbie of RAID card manager. Yep you've got battery backed caching RAID. So regular pgbench tells you how much faster RAID-1 is than RAID-5 at a read/write mixed load. You can run it with a -s switch for a read only benchmark to get an idea how much, if any, of a difference there is between the two. -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
