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-rw-r--r--man/man8/zpool.817
1 files changed, 15 insertions, 2 deletions
diff --git a/man/man8/zpool.8 b/man/man8/zpool.8
index eb35b74c0..80402c55e 100644
--- a/man/man8/zpool.8
+++ b/man/man8/zpool.8
@@ -95,7 +95,7 @@ zpool \- configures ZFS storage pools
.LP
.nf
-\fB\fBzpool iostat\fR [\fB-T\fR \fBd\fR | \fBu\fR] [\fB-ghHLpPvy\fR] [\fB-G\fR|[\fB-lq\fR]]
+\fB\fBzpool iostat\fR [\fB-T\fR \fBd\fR | \fBu\fR] [\fB-ghHLpPvy\fR] [\fB-lq\fR]|[\fB-r\fR|-\fBw\fR]]
[[\fIpool\fR ...]|[\fIpool vdev\fR ...]|[\fIvdev\fR ...]] [\fIinterval\fR[\fIcount\fR]]\fR
.fi
@@ -1510,7 +1510,7 @@ Scan using the default search path, the libblkid cache will not be consulted. A
.sp
.ne 2
.na
-\fB\fBzpool iostat\fR [\fB-T\fR \fBd\fR | \fBu\fR] [\fB-ghHLpPvy\fR] [\fB-w\fR|[\fB-lq\fR]] [[\fIpool\fR ...]|[\fIpool vdev\fR ...]|[\fIvdev\fR ...]] [\fIinterval\fR[\fIcount\fR]]\fR
+\fB\fBzpool iostat\fR [\fB-T\fR \fBd\fR | \fBu\fR] [\fB-ghHLpPvy\fR] [[\fB-lq\fR]|[\fB-r\fR|\fB-w\fR]] [[\fIpool\fR ...]|[\fIpool vdev\fR ...]|[\fIvdev\fR ...]] [\fIinterval\fR[\fIcount\fR]]\fR
.ad
.sp .6
@@ -1585,6 +1585,19 @@ Display full paths for vdevs instead of only the last component of the path. Th
.sp
.ne 2
.na
+\fB\fB-r\fR\fR
+.ad
+.RS 12n
+Print request size histograms for the leaf ZIOs. This includes histograms of
+individual ZIOs ("ind") and aggregate ZIOs ("agg"). These stats can be useful
+for seeing how well the ZFS IO aggregator is working. Do not confuse these
+request size stats with the block layer requests; it's possible ZIOs can
+be broken up before being sent to the block device.
+.RE
+
+.sp
+.ne 2
+.na
\fB\fB-v\fR\fR
.ad
.RS 12n