Messages in this thread | | | Date | Sun, 13 Aug 2000 20:34:26 +0200 | From | Jens Axboe <> | Subject | Re: Degrading disk read performance under 2.2.16 |
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On Sun, Aug 13 2000, Corin Hartland-Swann wrote: > The fact remains that disk performance is much worse under 2.2.16 and > heavy loads than under 2.2.15 - what I was trying to find out was what
A new elevator was introduced into 2.2.16, that may be affecting results. Try using elvtune from util-linux to set read_latency, write_latency, and max_bomb_segments much higher and see if that brings it back to 2.2.15 levels. (hint: use something big, like 10000000 for read/write latency, and 128 for max_bomb_segments).
-- * Jens Axboe <axboe@suse.de> * SuSE Labs
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