Messages in this thread | | | Date | Thu, 10 Jul 2008 09:31:09 +0100 | From | Alan Cox <> | Subject | Re: Higher than expected disk write(2) latency |
| |
> What we see is that AIO performs rather bad while we are still > enqueueing more writes (it misses right position on the disk and has to > do superfluous disk revolvings), however, once we stop enqueueing new > write request, those already in the queue are processed swiftly.
Which disk scheduler are you using - some of the disk schedulers intentionally delay writes to try and get better block merging.
Alan
| |