8 Jan
2007
8 Jan
'07
5:17 p.m.
Matt wrote:
You use elvtune to tweak it. Basically you just define the max length the write queue can be before attention will be given to reads and likewise for the read queue. man elvtune for more information.
"[root@server ~]# elvtune /dev/hda ioctl get: Invalid argument
elvtune is only useful on older kernels; for 2.6 use IO scheduler sysfs tunables instead.."
Thats what I get.
I did say:
"I assume you are talking about Centos 3.x with the 2.4 kernel"
For tweaking the io schedulers in 2.6, you need to mount the sysfs filesystem which is under /sys on RHEL4/Centos4. Play around with the values under /sys/block/devicename/queue/*.