Re: vmstat

[Patrick Welche <prlw1%cam.ac.uk@localhost>]

On Tue, Nov 10, 2020 at 05:07:10PM +0100, Lars Reichardt wrote:
> On Tue, 10 Nov 2020 12:12:14 +0000
> Patrick Welche <prlw1%cam.ac.uk@localhost> wrote:
> 
> > # vmstat -C
> > Pool cache statistics.
> > Name          Spin GrpSz Full Emty PoolLayer CacheLayer  Hit%
> > CpuLayer  Hit% amappl           8    63   66    0    496221
> > 1592973  68.8   563372236  99.7 anonpl       60772    63 11400   0
> > 55980901  177419830  68.4  9594977028  98.2 ...
> > xhcixfer         0    15    0    0         5          8  37.5
> >  77  89.6 xhcixfer         0    15    0    0         5         11
> > 54.5         193  94.3 zfs_znode_cache 2906   15   51    0   4258698
> >  17474551  75.6   215763165  91.9 ©ÿÿ          2368    15   53
> > 0   4471316   17390812  74.3   305275419  94.3 ©ÿÿ             0
> >  15    0    0    258353     259551   0.5      277790   6.6 ©ÿÿ
> >         0    15    0    0    117290     117459   0.1      119696
> > 1.9 ©ÿÿ             0    15    0    0     74991      75197   0.3
> >     79474   5.4 ©ÿÿ             2    15    0    0     36643
> > 36739   0.3       37986   3.3 ...
> > 
> > 
> > interesting "Pool" name... (10G wired memory box)
> > 
> > 
> 
> Those pool names seem clearly broken.
> It seems the box is running with a zfs pool which has it's own cache
> (ARC) which memory is entirely wired and might grow quite large.
> What does vmstat -vmC show for those pools?

Memory resource pool statistics
Name        Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
zfs_znode_cache 2906   15    0    0   4258698   17474551  75.6   215763165  91.9
zil_lwb_cache     0    15    0    0         0          0   nan           0   nan
©ÿÿ          2368    15    0    0   4471316   17390812  74.3   305275419  94.3
©ÿÿ             0    15    0    0    258353     259551   0.5      277790   6.6
©ÿÿ             0    15    0    0    117290     117459   0.1      119696   1.9
©ÿÿ             0    15    0    0     74991      75197   0.3       79474   5.4
©ÿÿ             2    15    0    0     36643      36739   0.3       37986   3.3
...

Thanks - I'll see if unmounting them etc helps...


Patrick