diff options
Diffstat (limited to 'man/man5/zfs-module-parameters.5')
| -rw-r--r-- | man/man5/zfs-module-parameters.5 | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/man/man5/zfs-module-parameters.5 b/man/man5/zfs-module-parameters.5 index 359e9f72f..250adc9ef 100644 --- a/man/man5/zfs-module-parameters.5 +++ b/man/man5/zfs-module-parameters.5 @@ -350,6 +350,19 @@ Default value: \fB8192\fR. .sp .ne 2 .na +\fBzfs_arc_evict_batch_limit\fR (int) +.ad +.RS 12n +Number ARC headers to evict per sub-list before proceding to another sub-list. +This batch-style operation prevents entire sub-lists from being evicted at once +but comes at a cost of additional unlocking and locking. +.sp +Default value: \fB10\fR. +.RE + +.sp +.ne 2 +.na \fBzfs_arc_grow_retry\fR (int) .ad .RS 12n @@ -398,6 +411,19 @@ Default value: \fB0\fR. .sp .ne 2 .na +\fBzfs_arc_meta_min\fR (ulong) +.ad +.RS 12n +The minimum allowed size in bytes that meta data buffers may consume in +the ARC. This value defaults to 0 which disables a floor on the amount +of the ARC devoted meta data. +.sp +Default value: \fB0\fR. +.RE + +.sp +.ne 2 +.na \fBzfs_arc_meta_prune\fR (int) .ad .RS 12n @@ -450,6 +476,40 @@ Default value: \fB100\fR. .sp .ne 2 .na +\fBzfs_arc_num_sublists_per_state\fR (int) +.ad +.RS 12n +To allow more fine-grained locking, each ARC state contains a series +of lists for both data and meta data objects. Locking is performed at +the level of these "sub-lists". This parameters controls the number of +sub-lists per ARC state. +.sp +Default value: 1 or the number of on-online CPUs, whichever is greater +.RE + +.sp +.ne 2 +.na +\fBzfs_arc_overflow_shift\fR (int) +.ad +.RS 12n +The ARC size is considered to be overflowing if it exceeds the current +ARC target size (arc_c) by a threshold determined by this parameter. +The threshold is calculated as a fraction of arc_c using the formula +"arc_c >> \fBzfs_arc_overflow_shift\fR". + +The default value of 8 causes the ARC to be considered to be overflowing +if it exceeds the target size by 1/256th (0.3%) of the target size. + +When the ARC is overflowing, new buffer allocations are stalled until +the reclaim thread catches up and the overflow condition no longer exists. +.sp +Default value: \fB8\fR. +.RE + +.sp +.ne 2 +.na \fBzfs_arc_p_aggressive_disable\fR (int) .ad .RS 12n |