svn commit: r286570 - in head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs: . sys

[Alexander Motin]

On 11.08.2015 12:38, Dmitry Morozovsky wrote:
> Alexander,
> 
> On Mon, 10 Aug 2015, Alexander Motin wrote:
> 
>> Author: mav
>> Date: Mon Aug 10 10:34:23 2015
>> New Revision: 286570
>> URL: https://svnweb.freebsd.org/changeset/base/286570
>>
>> Log:
>>   MFV r277426: 5408 managing ZFS cache devices requires lots of RAM
>>   
>>   illumos/illumos-gate at 89c86e32293a30cdd7af530c38b2073fee01411c
> 
> [snip]
> 
>>   For an average blocksize of 8KB, this means that for the L2ARC, the ratio
>>   of metadata to data has gone down from about 2.92% to 1.56%.  For a
>>   'storage optimized' EC2 instance with 1600GB of SSD and 60GB of RAM, this
>>   means that we expect a completely full L2ARC to use (1600 GB * 0.0156) /
>>   60GB = 41% of the available memory, down from 78%.
> 
> Thanks!
> 
> Any MFC planned please?

Theoretically planned, but no specific terms yet -- too many changes.

-- 
Alexander Motin