Ruben van Staveren
2017-Nov-10 15:44 UTC
ZFS arc behaviour different after upgrading to 10.4
Hi list, I noticed that the ZFS ARC is behaving differently with 10.4, giving me a much worser cache effeciency as with 10.3 The following grafana/telefraph graph illustrates this as follows. https://snapshot.raintank.io/dashboard/snapshot/X18wHgmqFnMccEYlnbwgQtYgLIZ4oQLU?panelId=65061&fullscreen&orgId=2 Left I'm still running 10.3, Started some maintenance (binary update with freebsd-update) at 12:36 and booted into 10.4 at 14:34. Since then the ARC hits/misses are much more irregular. Disabling compression (apparently also introduced in 10.4) didn't help that much with regards to the pattern although it did shave off some load of the system. Any thoughts on the changed behaviour? Cheers, Ruben -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 801 bytes Desc: OpenPGP digital signature URL: <http://lists.freebsd.org/pipermail/freebsd-stable/attachments/20171110/faf564c3/attachment.sig>