diff options
Diffstat (limited to 'man')
| -rw-r--r-- | man/man8/zpool.8 | 209 |
1 files changed, 206 insertions, 3 deletions
diff --git a/man/man8/zpool.8 b/man/man8/zpool.8 index bcbcaa249..1f14eee98 100644 --- a/man/man8/zpool.8 +++ b/man/man8/zpool.8 @@ -95,7 +95,9 @@ zpool \- configures ZFS storage pools .LP .nf -\fBzpool iostat\fR [\fB-T\fR d | u ] [\fB-gLPvy\fR] [\fIpool\fR] ... [\fIinterval\fR[\fIcount\fR]] +\fB\fBzpool iostat\fR [\fB-T\fR \fBd\fR | \fBu\fR] [\fB-ghHLpPvy\fR] [\fB-G\fR|[\fB-lq\fR]] + [[\fIpool\fR ...]|[\fIpool vdev\fR ...]|[\fIvdev\fR ...]] [\fIinterval\fR[\fIcount\fR]]\fR + .fi .LP @@ -1677,11 +1679,22 @@ Scan using the default search path, the libblkid cache will not be consulted. A .ne 2 .mk .na -\fB\fBzpool iostat\fR [\fB-T\fR \fBd\fR | \fBu\fR] [\fB-gLPvy\fR] [\fIpool\fR] ... [\fIinterval\fR[\fIcount\fR]]\fR +\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 + .ad .sp .6 .RS 4n -Displays \fBI/O\fR statistics for the given pools. When given an interval, the statistics are printed every \fIinterval\fR seconds until \fBCtrl-C\fR is pressed. If no \fIpools\fR are specified, statistics for every pool in the system is shown. If \fIcount\fR is specified, the command exits after \fIcount\fR reports are printed. +Displays \fBI/O\fR statistics for the given \fIpool\fRs/\fIvdev\fRs. You can +pass in a list of \fIpool\fRs, a \fIpool\fR and list of \fIvdev\fRs in that +\fIpool\fR, or a list of any \fIvdev\fRs from any \fIpool\fR. If no items are +specified, statistics for every pool in the system are shown. When given an +interval, the statistics are printed every \fIinterval\fR seconds until +\fBCtrl-C\fR is pressed. If \fIcount\fR is specified, the command exits after +\fIcount\fR reports are printed. The first report printed is always the +statistics since boot regardless of whether \fIinterval\fR and \fIcount\fR +are passed. However, this behavior can be suppressed with the -y flag. Also +note that the units of 'K', 'M', 'G'... that are printed in the report are in +base 1024. To get the raw values, use the \fB-p\fR flag. .sp .ne 2 .mk @@ -1710,6 +1723,17 @@ Display vdev GUIDs instead of the normal device names. These GUIDs can be used i .ne 2 .mk .na +\fB\fB-H\fR\fR +.ad +.RS 12n +.rt +Scripted mode. Do not display headers, and separate fields by a single tab instead of arbitrary space. +.RE + +.sp +.ne 2 +.mk +.na \fB\fB-L\fR\fR .ad .RS 12n @@ -1721,6 +1745,17 @@ Display real paths for vdevs resolving all symbolic links. This can be used to l .ne 2 .mk .na +\fB\fB-p\fR\fR +.ad +.RS 12n +.rt +Display numbers in parseable (exact) values. Time values are in nanoseconds. +.RE + +.sp +.ne 2 +.mk +.na \fB\fB-P\fR\fR .ad .RS 12n @@ -1749,9 +1784,177 @@ Verbose statistics. Reports usage statistics for individual \fIvdevs\fR within t .rt Omit statistics since boot. Normally the first line of output reports the statistics since boot. This option suppresses that first line of output. .RE +.sp +.ne 2 +.mk +.na +\fB\fB-w\fR\fR +.ad +.RS 12n +.rt +Display latency histograms: + +.sp +.ne 2 +.mk +.na +total_wait: +.ad +.RS 20n +.rt +Total IO time (queuing + disk IO time). +.RE +.ne 2 +.mk +.na +disk_wait: +.ad +.RS 20n +.rt +Disk IO time (time reading/writing the disk). +.RE +.ne 2 +.mk +.na +syncq_wait: +.ad +.RS 20n +.rt +Amount of time IO spent in synchronous priority queues. Does not include +disk time. +.RE +.ne 2 +.mk +.na +asyncq_wait: +.ad +.RS 20n +.rt +Amount of time IO spent in asynchronous priority queues. Does not include +disk time. +.RE +.ne 2 +.mk +.na +scrub: +.ad +.RS 20n +.rt +Amount of time IO spent in scrub queue. Does not include disk time. + + +.RE + +All histogram buckets are power-of-two sized. The time labels are the end +ranges of the buckets, so for example, a 15ns bucket stores latencies from +8-15ns. The last bucket is also a catch-all for latencies higher than the +maximum. +.RE +.sp +.ne 2 +.mk +.na +\fB\fB-l\fR\fR +.ad +.RS 12n +.rt +Include average latency statistics: + +.sp +.ne 2 +.mk +.na +total_wait: +.ad +.RS 20n +.rt +Average total IO time (queuing + disk IO time). +.RE +.ne 2 +.mk +.na +disk_wait: +.ad +.RS 20n +.rt +Average disk IO time (time reading/writing the disk). +.RE +.ne 2 +.mk +.na +syncq_wait: +.ad +.RS 20n +.rt +Average amount of time IO spent in synchronous priority queues. Does not +include disk time. +.RE +.ne 2 +.mk +.na +asyncq_wait: +.ad +.RS 20n +.rt +Average amount of time IO spent in asynchronous priority queues. Does not +include disk time. +.RE +.ne 2 +.mk +.na +scrub: +.ad +.RS 20n +.rt +Average queuing time in scrub queue. Does not include disk time. +.RE .RE +.sp +.ne 2 +.mk +.na +\fB\fB-q\fR\fR +.ad +.RS 12n +.rt +Include active queue statistics. Each priority queue has both pending ("pend") +and active ("activ") IOs. Pending IOs are waiting to be issued to the disk, and +active IOs have been issued to disk and are waiting for completion. These stats +are broken out by priority queue: +.sp +.ne 2 +.mk +.na +syncq_read/write: +.ad +.RS 20n +.rt +Current number of entries in synchronous priority queues. +.RE +.ne 2 +.mk +.na +asyncq_read/write: +.ad +.RS 20n +.rt +Current number of entries in asynchronous priority queues. +.RE +.ne 2 +.mk +.na +scrubq_read: +.ad +.RS 20n +.rt +Current number of entries in scrub queue. +.RE +All queue statistics are instantaneous measurements of the number of entries +in the queues. If you specify an interval, the measurements will be sampled +from the end of the interval. +.RE .sp .ne 2 .mk |