[zfs-discuss] ZFS consuming twice ARC's size and crashing system

Uncle Stoat stoatwblr at gmail.com
Tue Aug 20 07:39:24 EDT 2013

On 13/08/13 09:42, Gordan Bobic wrote:
> It is not unusual for arc to exceed arc_max by up to a factor of 2 due to
> memory fragmentation. The only thing you can really do is reduce it's size
> until you are no longer getting memory exhaustion. Increasing
> vm.min_free_kbytes (I typically set it to about 1% of RAM) may also help.

Increasing arc_metadata_max to 3/4 of the arc_max size might help too.

The problem with rsyncs is that they are heavy on metadata - and 
doubling up on them just makes things worse.

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