>> Effect of ReadAhead Settings >> disabled,256(default) , 512,1024 >> SEQUENTIAL >> xfs_ra0 414741 , 66144 >> xfs_ra256 403647, 545026 all tests on sda6 >> xfs_ra512 411357, 564769 >> xfs_ra1024 404392, 431168 >> >> looks like 512 was the best setting for this controller > > That's only known for sequential access. > How did it perform under the random access, or did the numbers not > change too much? RANDOM SEEKS /sec xfs_ra0 6341.0 xfs_ra256 14642.7 xfs_ra512 14415.6 xfs_ra1024 14541.6 the value does not seems to be having much effect unless its totally disabled. regds mallah. > -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
