Messages in this thread | | | Date | Mon, 24 Mar 2003 10:59:36 -0800 | From | Andrew Morton <> | Subject | Re: 2.5.65 interactivity |
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Maciej Soltysiak <solt@dns.toxicfilms.tv> wrote: > > > First thing we need to work out is whether it is a CPU scheduler thing > > or if it is a VM/MM/block/fs latency problem. > OK
It is a VM/MM/block/latency problem.
> > - How much memory do you have? > 128 MB
Your machine is swapping and paging like crazy. Bits of your X server get paged out to disk and take ages to come back because the heavy write streams are starving reads from disk.
> > - Try setting /proc/sys/vm/swappiness to zero > i will try. > > > - Try decreasing /proc/sys/vm/dirty_ratio to 15 > will try that too. >
These things should help - possibly the defaults are wrong.
Also the anticipatory IO scheduler in -mm kernels might help reduce the disk read latency.
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