Messages in this thread | | | From | "Miquel van Smoorenburg" <> | Subject | Re: High write latency, iowait, slow writes 2.6.9 | Date | Wed, 12 Jan 2005 21:20:18 +0000 (UTC) |
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In article <41E4BB99.90908@zanfx.com>, Paul A. Sumner <paul@zanfx.com> wrote: >I have a new server that during big io tasks, e.g., bonnie++ and >tiobench testing, becomes very unresponsive. Both bonnie++ and tiobench >show good read performance, but the write performance lags, max >latencies are into the *minutes* and it experiences extended high >iowait. I'm guessing the iowait may not be a real problem. The machine >is as follows:
Try another IO scheduler (boot with elevator=deadline or elevator=cfq on the kernel command line)
Mike.
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