> Could you check the values of the following sysctl variables: > > vfs.zfs.vdev.cache_size > vfs.zfs.vdev.cache_bshift > vfs.zfs.vdev.cache_max > kstat.zfs.misc.vdev_cache_stats.misses > kstat.zfs.misc.vdev_cache_stats.hits > kstat.zfs.misc.vdev_cache_stats.delegations
As predicted, all zero, apart from bshift which is 16 and max which is 16384 > https://openzfs.github.io/openzfs-docs/Performance%20and%20Tuning/Module%20Parameters.html#zfs-vdev-cache-size > > Quote: > > Note: with the current ZFS code, the vdev cache is not helpful and in some > cases actually harmful. Thus it is disabled by setting the > zfs_vdev_cache_size = 0 Ah, thats the thing I should have found msyelf I guess! :-) Actually, if smarter people than me think that its not useful on OpenZFS, then I shall probably leave it disabled. Generally people have a good reason for doing things. I shall have a read,and thankyou for confirming this (and thankyou for maintinaing zfs-stats! which is an invalauble tool I have found over the years) -pete. _______________________________________________ freebsd-stable@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org"
