diff options
| author | Tony Hutter <[email protected]> | 2016-05-25 14:21:35 -0700 |
|---|---|---|
| committer | Brian Behlendorf <[email protected]> | 2016-05-25 15:49:35 -0700 |
| commit | 7e945072d18541fb0c30e05b46cce14d01fea8aa (patch) | |
| tree | 6587039321787bd290cf84d2fb50e5e21f29b59d /man/man8 | |
| parent | 4442f60d8e959e9983e58ff534e7302ebf2f9d7e (diff) | |
Add request size histograms (-r) to zpool iostat, minor man page fix
Add -r option to "zpool iostat" to 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.
$ zpool iostat -r
mypool sync_read sync_write async_read async_write scrub
req_size ind agg ind agg ind agg ind agg ind agg
---------- ----- ----- ----- ----- ----- ----- ----- ----- ----- -----
512 0 0 0 0 0 0 530 0 0 0
1K 0 0 260 0 0 0 116 246 0 0
2K 0 0 0 0 0 0 0 431 0 0
4K 0 0 0 0 0 0 3 107 0 0
8K 15 0 35 0 0 0 0 6 0 0
16K 0 0 0 0 0 0 0 39 0 0
32K 0 0 0 0 0 0 0 0 0 0
64K 20 0 40 0 0 0 0 0 0 0
128K 0 0 20 0 0 0 0 0 0 0
256K 0 0 0 0 0 0 0 0 0 0
512K 0 0 0 0 0 0 0 0 0 0
1M 0 0 0 0 0 0 0 0 0 0
2M 0 0 0 0 0 0 0 0 0 0
4M 0 0 0 0 0 0 155 19 0 0
8M 0 0 0 0 0 0 0 811 0 0
16M 0 0 0 0 0 0 0 68 0 0
--------------------------------------------------------------------------------
Also rename the stray "-G" in the man page to be "-w" for latency histograms.
Signed-off-by: Tony Hutter <[email protected]>
Signed-off-by: Brian Behlendorf <[email protected]>
Signed-off-by: Tim Chase <[email protected]>
Closes #4659
Diffstat (limited to 'man/man8')
| -rw-r--r-- | man/man8/zpool.8 | 17 |
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 |