At 15:55 22-9-2003 +0200, Frank Hellmann wrote:
Hi!
That is a bit weird result, isn't it? On the hand-patched 2.4.20-18.9
Kernel with XFS 1.3.0pre4 I'll get much better read performance and about
similar write performance. I checked if there are any issues regarding the
internal log and tried an external one, but not much of a change with that.
The readahead defaults are skewed. Which comes from the Red Hat Errata
kernel. It changed from 2.4.18-27 to 2.4.20-18.
see /proc/sys/vm/max-readahead.
Default went from 127 to 31.
Since you seem to have some decent hardware *koff* I suggest setting
max-readahead to something like 511 or so.
Cheers
--
Seth
It might just be your lucky day, if you only knew.
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