Did you disable 'atime' updates for your filesystem? Otherwise the file
access times need to be periodically updated and this would happen may
every 15-30 seconds.
Not disabled. But 20MB worth of metadata updates while the system
practically does nothing? Only real things happening is a video
playbacking and XChat logging relatively few things to disk.
20MB would indeed be quite a lot. On one of my systems, 'iotop'
periodically shows up to 8504 KB of writen data, and no reads. This is
for the root pool. I have a pretty good idea of where that 8504 KB of
data comes from, and it is due to a daemon I have running. On another
system (which still uses UFS root, but with most data in a ZFS pool),
only a few tiny writes (biggest 810KB).
I think I found a/the cause. Once Firefox was killed, it quasi stopped.
It's probably related again to Firefox regularily rewriting all of its
SQLite databases for no good reason.
Hrm.
-mg
_______________________________________________
zfs-discuss mailing list
zfs-discuss@opensolaris.org
http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
