On 11/6/07, Nico -telmich- Schottelius < [EMAIL PROTECTED]> wrote: > > Hello! > > I've the problem that sometimes there are many disk waiting processes > (sysctl -n vm.vmtotal), but systat -vmstat shows da0 and da1 busy with > 0-10%.
I woudn't worry about how many are sleeping. But, How long they sleep would be interesting data. I guess that the disk i/o is at about 100%, but wondering why I see > those strange values. Why do you think it should be 100%? Are you running any disk I/O intense application? System Information: > > - Disks are attached to 07:01.0 RAID bus controller: 3ware Inc 9550SX > SATA-RAID > > u0216# uname -a > FreeBSD u0216.nshq.netstream.com 6.2-RELEASE FreeBSD 6.2-RELEASE #0: Wed > Oct 31 14:53:00 CET 2007 [EMAIL PROTECTED] > :/usr/obj/usr/src/sys/SMPPAEQUOTA i386 > > => kernel contains 3ware patches from CVS, marked for inclusion in 6.3, > because we've seen many times a freeze on that system before > > - Disks are 10k rpm sata disks. > - Board is a Supermicro X7DB8, processor is a quad core Xeon, > [EMAIL PROTECTED] > > Anyone an idea, > a) why systat -vmstat shows so small busy values? > b) how to debug it further? You can try experimenting with diffrent I/O loads to make sure that there is a problem before start debugging it. -Manjunath _______________________________________________ freebsd-performance@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-performance To unsubscribe, send any mail to "[EMAIL PROTECTED]"