Hot answers tagged zfsonlinux
I believe you are misunderstanding the ZIL purpose. You describe it as a write cache which it is not. No activity on the ZIL might just be a normal behavior depending on what is running on your machine. Nothing is ever anything read from the ZIL, this is a write only device outside possibly at mount time after a crash. There are only writes to it if ...
http://fibrevillage.com/storage/169-zfs-arc-on-linux-how-to-set-and-monitor-on-linux this article is very good starting version ZoL 0.6.2 you can set the c_max at runtime, however the ARC size will not be released automatically. to force the RAM to be released it is needed to export the zpool.
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