I have just increased my memory to 16GB on my FreeNAS 8.3.0 server as ARC was showing as being throttled at 8GB. After I added the memory I noticed that it did not appear to be being used. Looking at arc_summary output I could see
- ARC Max Size (High Water): 8:1 3.35 GiB
- vfs.zfs.arc_max = 3601681712
I have amended the tunable to '10392610498' (autotune recommendation) rebooted server but the above values (3601681712) remain. If I lower the tunable (to 2601681712) then arc_summary output shows that the new value has been picked up. note 16GB RAM is being recognised 'Real Installed: 16.00 GiB'
Is there a setting somewhere which is limiting vfs.zfs.arc_max to 3601681712 irrespective of tunable value?
Thanks,
Jon
- ARC Max Size (High Water): 8:1 3.35 GiB
- vfs.zfs.arc_max = 3601681712
I have amended the tunable to '10392610498' (autotune recommendation) rebooted server but the above values (3601681712) remain. If I lower the tunable (to 2601681712) then arc_summary output shows that the new value has been picked up. note 16GB RAM is being recognised 'Real Installed: 16.00 GiB'
Is there a setting somewhere which is limiting vfs.zfs.arc_max to 3601681712 irrespective of tunable value?
Thanks,
Jon