Dear Andriy and FreeBSD community,
> I am not sure if the buffers are leaked somehow or if they are actually in
> It's one of the very few places where data buffers are allocated without
> charging ARC. In all other places it's quite easy to match allocations and
> deallocations. But in L2ARC it is not obvious that all buffers get freed or
> when that happens.
After one week under load I think we figure out the cause: it's L2ARC.
Here's the top's header for 7d17h of the runtime:
last pid: 46409; load averages: 0.37, 0.62, 0.70 up 7+17:14:01 07:24:10
173 processes: 1 running, 171 sleeping, 1 zombie
CPU: 2.0% user, 0.0% nice, 3.5% system, 0.4% interrupt, 94.2% idle
Mem: 8714M Active, 14G Inact, 96G Wired, 1929M Cache, 3309M Buf, 3542M Free
ARC: 85G Total, 2558M MFU, 77G MRU, 28M Anon, 1446M Header, 4802M Other
ARC related tunables:
For more than 7 days of hard runtime the picture clearly shows:
Wired minus ARC = 11..12Gb, ARC grow and shrinks in 80-87Gb range and the
system runs just fine.
So what shall we do with L2ARC leakage ?
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