On Thu, Sep 18, 2003 at 12:06:32PM +1000, Jeremy Field wrote:
> I am using linux 2.4.21 with xfs 1.3 on debian-unstable. Since I
> upgraded from 2.4.18-xfs-1.1, my xfs partitions have been showing pulses
> of activity every five seconds, I think because of xfssyncd. The hard
> drive physically seeks every five seconds too.
> I have reviewed this mailing list and elsewhere for clues, but can't
> work out either:
> a) whether this behaviour is normal, or
> b) how to change the interval.
A sysctl variable controls this: /proc/sys/fs/xfs/sync_interval
fs.xfs.sync_interval (Min: HZ Default: 30*HZ Max: 60*HZ)
The interval at which the xfssyncd thread for xfs filesystems
flushes metadata out to disk. This thread will flush log
activity out, and do some processing on unlinked inodes
What makes you suspect xfssyncd? It could also be some arbitrary
process deciding to write something out every few seconds of course.