>>>The behavior that I'm observing and that want your help is when the >>>system is accessing some directory with many small files ( directories >>>with ~ 1 million of ~30kb files), the performance is very poor. >> >> Hi, > > I'm using zfs, I think this change the things.. no ? > > > Have you adjusted the dirhash value ? What does > > > > sysctl -a vfs.ufs | grep dirhash > > # sysctl -a vfs.ufs | grep dirhash > vfs.ufs.dirhash_docheck: 0 > vfs.ufs.dirhash_mem: 1410338 > vfs.ufs.dirhash_maxmem: 2097152 > vfs.ufs.dirhash_minsize: 2560
I agree with Mike. Try to run this command while listing your large directory. You'll see that dirhash_mem will reach dirhash_maxmem. So, the value of dirhash_maxmem should be increased. One more hint. Mounting filesystems with -noatime option greatly improves read performance. Apply this also, if you haven't done this yet. _______________________________________________ freebsd-performance@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-performance To unsubscribe, send any mail to "[EMAIL PROTECTED]"
