Messages in this thread | | | Date | Sat, 11 Jun 2005 02:29:59 -0700 | From | Andrew Morton <> | Subject | Re: cfq misbehaving on 2.6.11-1.14_FC3 |
| |
<spaminos-ker@yahoo.com> wrote: > > Hello, I am running into a very bad problem on one of my production servers. > > * the config > Linux Fedora core 3 latest everything, kernel 2.6.11-1.14_FC3 > AMD Opteron 2 GHz, 1 G RAM, 80 GB Hard drive (IDE, Western Digital) > > I have a log processor running in the background, it's using sqlite for storing > the information it finds in the logs. It takes a few hours to complete a run. > It's clearly I/O bound (SleepAVG = 98%, according to /proc/pid/status). > I have to use the cfq scheduler because it's the only scheduler that is fair > between processes (or should be, keep reading). > > * the problem > Now, after an hour or so of processing, the machine becomes very unresponsive > when trying to do new disk operations. I say new because existing processes > that stream data to disk don't seem to suffer so much.
It might be useful to test 2.6.12-rc6-mm1 - it has a substantially rewritten CFQ implementation. - 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/
| |