On 03/08/2003 at 22:45, Gaudenz Steinlin wrote: > This article only explains how to gather global statistics about > filesystem reads with vmstat.
I know, I was mentioning it as it contains some useful tips for tuning daemons and that kind of things that are useful when you want to save battery (or reduce temperature). > Do you know if there is a tool to identify processes that read from > disk? Something like per process vmstat would be needed to identify > the process to blame for the read. Not in userspace, but laptop-mode has a debug switch that can help you (from laptop-mode.txt in kernel Documentation) : | It can happen that the disk still keeps spinning up and you don't | quite know why or what causes it. The laptop mode patch has a little | helper for that as well, /proc/sys/vm/block-dump. When set to 1, it | will dump info to the kernel message buffer about what process caused | the io. Be very careful when playing with this setting, it is | advisable to shut down syslog first! I must say I have not tried it. -- Kiko
