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-.\" SPDX-License-Identifier: CDDL-1.0
-.\"
-.\" 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