Date: Tue, 11 Mar 2014 17:03:25 +0100 From: "Nagy, Attila" <bra@fsn.hu> To: FreeBSD FS <freebsd-fs@freebsd.org> Subject: ZFS eats memory/L2ARC while doing nothing? Message-ID: <531F33CD.8080005@fsn.hu>
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Hi, Yesterday I have created a server with stable/10@r262152. Made a zpool on it and left it running. The whole file system had only some empty directories (needed to populate it later for storage) and some programs, which do some reads on it (stat'ing files for existence). Today, I can see these graphs: https://lh3.googleusercontent.com/-CY8hLr7s6DY/Ux8xgqolTuI/AAAAAAAAKec/5gR99PIhPYw/s800/zfs_mem-day.png https://lh6.googleusercontent.com/-gbUzPy5U8ko/Ux8xeKOq_zI/AAAAAAAAKeU/ZFpZx3zE4I4/s800/memory-day.png https://lh5.googleusercontent.com/-KT7DiptLwEA/Ux8xbMXZ9NI/AAAAAAAAKeM/x2ZbHUJVvug/s800/iopsstat-day.png So it seems ZFS did an average of 5 write IOPS and that L2ARC's side constantly grew to a whopping 6.2 GiBs (again: the file system is empty, only 42*42 directories were created on it). Is this normal? What causes this?
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