[Bug 216364] ZFS ARC cache is duplicating data? The cache size gets bigger then the pool.
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Wed Feb 8 11:12:30 UTC 2017
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=216364
--- Comment #9 from Andriy Gapon <avg at FreeBSD.org> ---
(In reply to k_georgiev from comment #7)
I haven't done any calculations, but it's quite possible that you are not
having any problem. You are comparing the size of the data on disk where some
of it is rather well compressed with the size of the data in ARC where the data
is uncompressed (and after the compressed ARC support was added, a cached
buffer could be compressed, uncompressed or both).
Check what zfs get logicalused zroot gives you.
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