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tunable docs

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shartse committed Apr 3, 2019
1 parent 778a6fb commit db80cf0117a117abd3f1e6fdefc474985d66b767
Showing with 27 additions and 0 deletions.
  1. +27 −0 man/man5/zfs-module-parameters.5
@@ -1728,6 +1728,33 @@ Pattern written to vdev free space by \fBzpool initialize\fR.
Default value: \fB16,045,690,984,833,335,022\fR (0xdeadbeefdeadbeee).
.RE

.sp
.ne 2
.na
\fBzfs_livelist_max_entries\fR (ulong)
.ad
.RS 12n
The threshold size (in block pointers) at which we create a new sub-livelist.
Larger sublists are more costly from a memory perspective but the fewer
sublists there are, the lower the cost of insertion.
.sp
Default value: \fB500,000\fR.
.RE

.sp
.ne 2
.na
\fBzfs_livelist_min_percent_shared\fR (int)
.ad
.RS 12n
If the amount of shared space between a snapshot and its clone drops below
this threshold, the clone turns off the livelist and reverts to the old deletion
method. This is in place because once a clone has been overwritten enough
livelists no long give us a benefit.
.sp
Default value: \fB75\fR.
.RE

.sp
.ne 2
.na

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