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openzfsonosx / zfs

OpenZFS on OS X
https://openzfsonosx.org/
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Memory exhausted after intensive zfs receive #565

Open captain-haddock17 opened 7 years ago

captain-haddock17 commented 7 years ago

With OSX10.11.6 / O3 v1.6.1-1 After some time of RAM pressure due to intensive zfs receive of formerly backed-up pools, my MacPro 4,1 (5,1 microcode) almost stalled after having exhausted 16GB RAM. (got the OS X Alert popup message).

I did tried to quit some apps, but did not helped, OSX could not quit the (red) marked apps. so big button switch ...

2 zpools of 16TB (14.5 TB netto) each.

NAME    SIZE  ALLOC   FREE  EXPANDSZ   FRAG    CAP  DEDUP  HEALTH  ALTROOT
Bay    14,5T  8,25T  6,25T         -    30%    56%  1.00x  ONLINE  -
LaCie  14,5T  4,78T  9,72T         -    22%    32%  1.00x  ONLINE  -

Note: Did not tried yet some tuning on kstat.zfs.darwin.tunable.zfs_arc_max as seen at https://openzfsonosx.org/forum/viewtopic.php?f=11&t=2838

Any advice ?

captain-haddock17 commented 7 years ago

On normal operations on files on ZFS pools, I see kernel's memory going up, and after a while going down (effective memory release from zfs).