ZFS L2ARC - incorrect size and abnormal system load on r255173

[Vitalij Satanivskij]

Data on pool have compressratio around 1.4 

On diferent servers with same data type and load L2 ARC Size: (Adaptive) can be diferent 

for example 1.04    TiB vs  1.45    TiB

But it's all have same porblem  - grow in time.


More stange for us - 

ARC: 80G Total, 4412M MFU, 5040M MRU, 76M Anon, 78G Header, 2195M Other

78G header size and ubnormal - 

kstat.zfs.misc.arcstats.l2_cksum_bad: 210920592
kstat.zfs.misc.arcstats.l2_io_error: 7362414

sysctl's growing avery second.

All part's of server (as hardware part's) in in normal state.

After reboot no problem's for some period untile cache size grow to some limit.



Mark Felder wrote:
MF> On Mon, Oct 7, 2013, at 13:09, Dmitriy Makarov wrote:
MF> > 
MF> > How can L2 ARC Size: (Adaptive) be 1.44 TiB (up) with total physical size
MF> > of L2ARC devices 490GB?
MF> > 
MF> 
MF> http://svnweb.freebsd.org/base?view=revision&revision=251478
MF> 
MF> L2ARC compression perhaps?
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