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Willy Tarreau wrote: > On Sat, Sep 17, 2005 at 01:32:53PM +0300, Al Boldi wrote: > > Willy Tarreau wrote: > > > On Sat, Sep 17, 2005 at 07:26:11AM +0300, Al Boldi wrote: > > > > Monitoring disk access using gkrellm, I noticed that a command like > > > > > > > > cat /dev/hda > /dev/null > > > > > > > > shows eradic disk reads ranging from 0 to 80MB/s on an otherwise > > > > idle system. New synonym: eradic=erratic :) > Denis' tool seems clearly more suited to analyse your problem. The problem seems to be a multi-access collision in the queue, which forces a ~50% reduction of thruput, which recovers with another multi-access collision. Maybe?! -- Al - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | |||||||||
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