diff options
Diffstat (limited to 'man/man5')
| -rw-r--r-- | man/man5/zfs-module-parameters.5 | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/man/man5/zfs-module-parameters.5 b/man/man5/zfs-module-parameters.5 index 6be382eac..eabd8ebe9 100644 --- a/man/man5/zfs-module-parameters.5 +++ b/man/man5/zfs-module-parameters.5 @@ -331,12 +331,12 @@ Default value: \fB1,048,576\fR. .sp .ne 2 .na -\fBzfetch_block_cap\fR (uint) +\fBzfetch_max_distance\fR (uint) .ad .RS 12n -Max number of blocks to prefetch at a time +Max bytes to prefetch per stream (default 8MB). .sp -Default value: \fB256\fR. +Default value: \fB8,388,608\fR. .RE .sp @@ -1246,7 +1246,10 @@ Default value: \fB52,428,800\fR. \fBzfs_prefetch_disable\fR (int) .ad .RS 12n -Disable all ZFS prefetching +This tunable disables predictive prefetch. Note that it leaves "prescient" +prefetch (e.g. prefetch for zfs send) intact. Unlike predictive prefetch, +prescient prefetch never issues i/os that end up not being needed, so it +can't hurt performance. .sp Use \fB1\fR for yes and \fB0\fR for no (default). .RE |