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man zpool: get back iostat -y and -w description #7483

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Apr 30, 2018
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man zpool: get back iostat -y and -w description #7483

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21 changes: 19 additions & 2 deletions man/man8/zpool.8
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Original file line number Diff line number Diff line change
Expand Up @@ -23,11 +23,11 @@
.\" Copyright (c) 2012, 2017 by Delphix. All rights reserved.
.\" Copyright (c) 2012 Cyril Plisko. All Rights Reserved.
.\" Copyright (c) 2017 Datto Inc.
.\" Copyright (c) 2017 George Melikov. All Rights Reserved.
.\" Copyright (c) 2018 George Melikov. All Rights Reserved.
.\" Copyright 2017 Nexenta Systems, Inc.
.\" Copyright (c) 2017 Open-E, Inc. All Rights Reserved.
.\"
.Dd March 9, 2018
.Dd April 27, 2018
.Dt ZPOOL 8 SMM
.Os Linux
.Sh NAME
Expand Down Expand Up @@ -1581,7 +1581,24 @@ block device.
Verbose statistics Reports usage statistics for individual vdevs within the
pool, in addition to the pool-wide statistics.
.It Fl y
Omit statistics since boot.
Normally the first line of output reports the statistics since boot.
This option suppresses that first line of output.
.It Fl w
Display latency histograms:
.Pp
.Ar total_wait :
Total IO time (queuing + disk IO time).
.Ar disk_wait :
Disk IO time (time reading/writing the disk).
.Ar syncq_wait :
Amount of time IO spent in synchronous priority queues. Does not include
disk time.
.Ar asyncq_wait :
Amount of time IO spent in asynchronous priority queues. Does not include
disk time.
.Ar scrub :
Amount of time IO spent in scrub queue. Does not include disk time.
.It Fl l
Include average latency statistics:
.Pp
Expand Down