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Update documentation of l2arc_mfuonly

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with regard to evicted_l2_eligibile_mru. Even if l2arc_mfuonly is
enabled, this is not reflected in evicted_l2_eligible_mru as this
information is useful for deciding whether to toggle l2arc_mfuonly
depending on the current workload.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: George Amanakis <gamanakis@gmail.com>
Closes #10945
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George Amanakis 2020-09-21 12:26:24 -04:00 committed by GitHub
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5
man/man5/zfs-module-parameters.5
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@ -218,7 +218,10 @@ If accessed again they are counted as MRU and the \fBl2arc_mru_asize\fR arcstat
will not be 0. The ARC status of L2ARC buffers when they were first cached in
L2ARC can be seen in the \fBl2arc_mru_asize\fR, \fBl2arc_mfu_asize\fR and
\fBl2arc_prefetch_asize\fR arcstats when importing the pool or onlining a cache
device if persistent L2ARC is enabled.
device if persistent L2ARC is enabled. The \fBevicted_l2_eligible_mru\fR
arcstat does not take into account if this option is enabled as the information
provided by the evicted_l2_eligible_* arcstats can be used to decide if
toggling this option is appropriate for the current workload.
.sp
Use \fB0\fR for no (default) and \fB1\fR for yes.
.RE