mirror of
https://git.proxmox.com/git/mirror_zfs.git
synced 2024-12-26 03:09:34 +03:00
4d469acd17
Add ARC structural breakdown, ARC types breakdown, ARC states breakdown similar to arc_summary. Additional cleanups included. Reviewed-by: Alexander Motin <mav@FreeBSD.org> Signed-off-by: Theera K. <tkittich@hotmail.com> Closes #16509
427 lines
8.8 KiB
Groff
427 lines
8.8 KiB
Groff
.\"
|
|
.\" This file and its contents are supplied under the terms of the
|
|
.\" Common Development and Distribution License ("CDDL"), version 1.0.
|
|
.\" You may only use this file in accordance with the terms of version
|
|
.\" 1.0 of the CDDL.
|
|
.\"
|
|
.\" A full copy of the text of the CDDL should have accompanied this
|
|
.\" source. A copy of the CDDL is also available via the Internet at
|
|
.\" http://www.illumos.org/license/CDDL.
|
|
.\"
|
|
.\" Copyright 2014 Adam Stevko. All rights reserved.
|
|
.\" Copyright (c) 2015 by Delphix. All rights reserved.
|
|
.\" Copyright (c) 2020 by AJ Jordan. All rights reserved.
|
|
.\"
|
|
.Dd December 23, 2022
|
|
.Dt ARCSTAT 1
|
|
.Os
|
|
.
|
|
.Sh NAME
|
|
.Nm arcstat
|
|
.Nd report ZFS ARC and L2ARC statistics
|
|
.Sh SYNOPSIS
|
|
.Nm
|
|
.Op Fl havxp
|
|
.Op Fl f Ar field Ns Op , Ns Ar field Ns …
|
|
.Op Fl o Ar file
|
|
.Op Fl s Ar string
|
|
.Op Ar interval
|
|
.Op Ar count
|
|
.
|
|
.Sh DESCRIPTION
|
|
.Nm
|
|
prints various ZFS ARC and L2ARC statistics in vmstat-like fashion:
|
|
.Bl -tag -compact -offset Ds -width "l2asize"
|
|
.It Sy c
|
|
ARC target size
|
|
.It Sy dh%
|
|
Demand hit percentage
|
|
.It Sy di%
|
|
Demand I/O hit percentage
|
|
.It Sy dm%
|
|
Demand miss percentage
|
|
.It Sy ddh%
|
|
Demand data hit percentage
|
|
.It Sy ddi%
|
|
Demand data I/O hit percentage
|
|
.It Sy ddm%
|
|
Demand data miss percentage
|
|
.It Sy dmh%
|
|
Demand metadata hit percentage
|
|
.It Sy dmi%
|
|
Demand metadata I/O hit percentage
|
|
.It Sy dmm%
|
|
Demand metadata miss percentage
|
|
.It Sy mfu
|
|
MFU list hits per second
|
|
.It Sy mh%
|
|
Metadata hit percentage
|
|
.It Sy mi%
|
|
Metadata I/O hit percentage
|
|
.It Sy mm%
|
|
Metadata miss percentage
|
|
.It Sy mru
|
|
MRU list hits per second
|
|
.It Sy ph%
|
|
Prefetch hits percentage
|
|
.It Sy pi%
|
|
Prefetch I/O hits percentage
|
|
.It Sy pm%
|
|
Prefetch miss percentage
|
|
.It Sy pdh%
|
|
Prefetch data hits percentage
|
|
.It Sy pdi%
|
|
Prefetch data I/O hits percentage
|
|
.It Sy pdm%
|
|
Prefetch data miss percentage
|
|
.It Sy pmh%
|
|
Prefetch metadata hits percentage
|
|
.It Sy pmi%
|
|
Prefetch metadata I/O hits percentage
|
|
.It Sy pmm%
|
|
Prefetch metadata miss percentage
|
|
.It Sy dhit
|
|
Demand hits per second
|
|
.It Sy dioh
|
|
Demand I/O hits per second
|
|
.It Sy dmis
|
|
Demand misses per second
|
|
.It Sy ddhit
|
|
Demand data hits per second
|
|
.It Sy ddioh
|
|
Demand data I/O hits per second
|
|
.It Sy ddmis
|
|
Demand data misses per second
|
|
.It Sy dmhit
|
|
Demand metadata hits per second
|
|
.It Sy dmioh
|
|
Demand metadata I/O hits per second
|
|
.It Sy dmmis
|
|
Demand metadata misses per second
|
|
.It Sy hit%
|
|
ARC hit percentage
|
|
.It Sy hits
|
|
ARC hits per second
|
|
.It Sy ioh%
|
|
ARC I/O hits percentage
|
|
.It Sy iohs
|
|
ARC I/O hits per second
|
|
.It Sy mfug
|
|
MFU ghost list hits per second
|
|
.It Sy mhit
|
|
Metadata hits per second
|
|
.It Sy mioh
|
|
Metadata I/O hits per second
|
|
.It Sy miss
|
|
ARC misses per second
|
|
.It Sy mmis
|
|
Metadata misses per second
|
|
.It Sy mrug
|
|
MRU ghost list hits per second
|
|
.It Sy phit
|
|
Prefetch hits per second
|
|
.It Sy pioh
|
|
Prefetch I/O hits per second
|
|
.It Sy pmis
|
|
Prefetch misses per second
|
|
.It Sy pdhit
|
|
Prefetch data hits per second
|
|
.It Sy pdioh
|
|
Prefetch data I/O hits per second
|
|
.It Sy pdmis
|
|
Prefetch data misses per second
|
|
.It Sy pmhit
|
|
Prefetch metadata hits per second
|
|
.It Sy pmioh
|
|
Prefetch metadata I/O hits per second
|
|
.It Sy pmmis
|
|
Prefetch metadata misses per second
|
|
.It Sy read
|
|
Total ARC accesses per second
|
|
.It Sy time
|
|
Current time
|
|
.It Sy size
|
|
ARC size
|
|
.It Sy arcsz
|
|
Alias for
|
|
.Sy size
|
|
.It Sy unc
|
|
Uncached list hits per second
|
|
.It Sy dread
|
|
Demand accesses per second
|
|
.It Sy ddread
|
|
Demand data accesses per second
|
|
.It Sy dmread
|
|
Demand metadata accesses per second
|
|
.It Sy eskip
|
|
evict_skip per second
|
|
.It Sy miss%
|
|
ARC miss percentage
|
|
.It Sy mread
|
|
Metadata accesses per second
|
|
.It Sy pread
|
|
Prefetch accesses per second
|
|
.It Sy pdread
|
|
Prefetch data accesses per second
|
|
.It Sy pmread
|
|
Prefetch metadata accesses per second
|
|
.It Sy l2hit%
|
|
L2ARC access hit percentage
|
|
.It Sy l2hits
|
|
L2ARC hits per second
|
|
.It Sy l2miss
|
|
L2ARC misses per second
|
|
.It Sy l2read
|
|
Total L2ARC accesses per second
|
|
.It Sy l2pref
|
|
L2ARC prefetch allocated size per second
|
|
.It Sy l2pref%
|
|
L2ARC prefetch allocated size percentage
|
|
.It Sy l2mfu
|
|
L2ARC MFU allocated size per second
|
|
.It Sy l2mfu%
|
|
L2ARC MFU allocated size percentage
|
|
.It Sy l2mru
|
|
L2ARC MRU allocated size per second
|
|
.It Sy l2mru%
|
|
L2ARC MRU allocated size percentage
|
|
.It Sy l2data
|
|
L2ARC data (buf content) allocated size per second
|
|
.It Sy l2data%
|
|
L2ARC data (buf content) allocated size percentage
|
|
.It Sy l2meta
|
|
L2ARC metadata (buf content) allocated size per second
|
|
.It Sy l2meta%
|
|
L2ARC metadata (buf content) allocated size percentage
|
|
.It Sy l2size
|
|
Size of the L2ARC
|
|
.It Sy mtxmis
|
|
mutex_miss per second
|
|
.It Sy l2bytes
|
|
Bytes read per second from the L2ARC
|
|
.It Sy l2wbytes
|
|
Bytes written per second to the L2ARC
|
|
.It Sy l2miss%
|
|
L2ARC access miss percentage
|
|
.It Sy l2asize
|
|
Actual (compressed) size of the L2ARC
|
|
.It Sy cmpsz
|
|
Compressed size
|
|
.It Sy cmpsz%
|
|
Compressed size percentage
|
|
.It Sy ovhsz
|
|
Overhead size
|
|
.It Sy ovhsz%
|
|
Overhead size percentage
|
|
.It Sy bonsz
|
|
Bonus size
|
|
.It Sy bonsz%
|
|
Bonus size percentage
|
|
.It Sy dnosz
|
|
Dnode size
|
|
.It Sy dnosz%
|
|
Dnode size percentage
|
|
.It Sy dbusz
|
|
Dbuf size
|
|
.It Sy dbusz%
|
|
Dbuf size percentage
|
|
.It Sy hdrsz
|
|
Header size
|
|
.It Sy hdrsz%
|
|
Header size percentage
|
|
.It Sy l2hsz
|
|
L2 header size
|
|
.It Sy l2hsz%
|
|
L2 header size percentage
|
|
.It Sy abdsz
|
|
ABD chunk waste size
|
|
.It Sy abdsz%
|
|
ABD chunk waste size percentage
|
|
.It Sy datatg
|
|
ARC data target
|
|
.It Sy datatg%
|
|
ARC data target percentage
|
|
.It Sy datasz
|
|
ARC data size
|
|
.It Sy datasz%
|
|
ARC data size percentage
|
|
.It Sy metatg
|
|
ARC metadata target
|
|
.It Sy metatg%
|
|
ARC metadata target percentage
|
|
.It Sy metasz
|
|
ARC metadata size
|
|
.It Sy metasz%
|
|
ARC metadata size percentage
|
|
.It Sy anosz
|
|
Anonymous size
|
|
.It Sy anosz%
|
|
Anonymous size percentage
|
|
.It Sy anoda
|
|
Anonymous data size
|
|
.It Sy anoda%
|
|
Anonymous data size percentage
|
|
.It Sy anome
|
|
Anonymous metadata size
|
|
.It Sy anome%
|
|
Anonymous metadata size percentage
|
|
.It Sy anoed
|
|
Anonymous evictable data size
|
|
.It Sy anoed%
|
|
Anonymous evictable data size percentage
|
|
.It Sy anoem
|
|
Anonymous evictable metadata size
|
|
.It Sy anoem%
|
|
Anonymous evictable metadata size percentage
|
|
.It Sy mfutg
|
|
MFU target
|
|
.It Sy mfutg%
|
|
MFU target percentage
|
|
.It Sy mfudt
|
|
MFU data target
|
|
.It Sy mfudt%
|
|
MFU data target percentage
|
|
.It Sy mfumt
|
|
MFU metadata target
|
|
.It Sy mfumt%
|
|
MFU metadata target percentage
|
|
.It Sy mfusz
|
|
MFU size
|
|
.It Sy mfusz%
|
|
MFU size percentage
|
|
.It Sy mfuda
|
|
MFU data size
|
|
.It Sy mfuda%
|
|
MFU data size percentage
|
|
.It Sy mfume
|
|
MFU metadata size
|
|
.It Sy mfume%
|
|
MFU metadata size percentage
|
|
.It Sy mfued
|
|
MFU evictable data size
|
|
.It Sy mfued%
|
|
MFU evictable data size percentage
|
|
.It Sy mfuem
|
|
MFU evictable metadata size
|
|
.It Sy mfuem%
|
|
MFU evictable metadata size percentage
|
|
.It Sy mfugsz
|
|
MFU ghost size
|
|
.It Sy mfugd
|
|
MFU ghost data size
|
|
.It Sy mfugm
|
|
MFU ghost metadata size
|
|
.It Sy mrutg
|
|
MRU target
|
|
.It Sy mrutg%
|
|
MRU target percentage
|
|
.It Sy mrudt
|
|
MRU data target
|
|
.It Sy mrudt%
|
|
MRU data target percentage
|
|
.It Sy mrumt
|
|
MRU metadata target
|
|
.It Sy mrumt%
|
|
MRU metadata target percentage
|
|
.It Sy mrusz
|
|
MRU size
|
|
.It Sy mrusz%
|
|
MRU size percentage
|
|
.It Sy mruda
|
|
MRU data size
|
|
.It Sy mruda%
|
|
MRU data size percentage
|
|
.It Sy mrume
|
|
MRU metadata size
|
|
.It Sy mrume%
|
|
MRU metadata size percentage
|
|
.It Sy mrued
|
|
MRU evictable data size
|
|
.It Sy mrued%
|
|
MRU evictable data size percentage
|
|
.It Sy mruem
|
|
MRU evictable metadata size
|
|
.It Sy mruem%
|
|
MRU evictable metadata size percentage
|
|
.It Sy mrugsz
|
|
MRU ghost size
|
|
.It Sy mrugd
|
|
MRU ghost data size
|
|
.It Sy mrugm
|
|
MRU ghost metadata size
|
|
.It Sy uncsz
|
|
Uncached size
|
|
.It Sy uncsz%
|
|
Uncached size percentage
|
|
.It Sy uncda
|
|
Uncached data size
|
|
.It Sy uncda%
|
|
Uncached data size percentage
|
|
.It Sy uncme
|
|
Uncached metadata size
|
|
.It Sy uncme%
|
|
Uncached metadata size percentage
|
|
.It Sy unced
|
|
Uncached evictable data size
|
|
.It Sy unced%
|
|
Uncached evictable data size percentage
|
|
.It Sy uncem
|
|
Uncached evictable metadata size
|
|
.It Sy uncem%
|
|
Uncached evictable metadata size percentage
|
|
.It Sy grow
|
|
ARC grow disabled
|
|
.It Sy need
|
|
ARC reclaim needed
|
|
.It Sy free
|
|
The ARC's idea of how much free memory there is, which includes evictable memory
|
|
in the page cache.
|
|
Since the ARC tries to keep
|
|
.Sy avail
|
|
above zero,
|
|
.Sy avail
|
|
is usually more instructive to observe than
|
|
.Sy free .
|
|
.It Sy avail
|
|
The ARC's idea of how much free memory is available to it, which is a bit less
|
|
than
|
|
.Sy free .
|
|
May temporarily be negative, in which case the ARC will reduce the target size
|
|
.Sy c .
|
|
.El
|
|
.
|
|
.Sh OPTIONS
|
|
.Bl -tag -width "-v"
|
|
.It Fl a
|
|
Print all possible stats.
|
|
.It Fl f
|
|
Display only specific fields.
|
|
See
|
|
.Sx DESCRIPTION
|
|
for supported statistics.
|
|
.It Fl h
|
|
Display help message.
|
|
.It Fl o
|
|
Report statistics to a file instead of the standard output.
|
|
.It Fl p
|
|
Disable auto-scaling of numerical fields (for raw, machine-parsable values).
|
|
.It Fl s
|
|
Display data with a specified separator (default: 2 spaces).
|
|
.It Fl x
|
|
Print extended stats
|
|
.Pq same as Fl f Sy time , Ns Sy mfu , Ns Sy mru , Ns Sy mfug , Ns Sy mrug , Ns Sy eskip , Ns Sy mtxmis , Ns Sy dread , Ns Sy pread , Ns Sy read .
|
|
.It Fl v
|
|
Show field headers and definitions
|
|
.El
|
|
.
|
|
.Sh OPERANDS
|
|
The following operands are supported:
|
|
.Bl -tag -compact -offset Ds -width "interval"
|
|
.It Ar interval
|
|
Specify the sampling interval in seconds.
|
|
.It Ar count
|
|
Display only
|
|
.Ar count
|
|
reports.
|
|
.El
|