svcadm(8)을 검색하려면 섹션에서 8 을 선택하고, 맨 페이지 이름에 svcadm을 입력하고 검색을 누른다.
vmstat(8)
vmstat(8) System Administration Commands vmstat(8)
NAME
vmstat - report virtual memory statistics
SYNOPSIS
vmstat [-ipqQsSw] [-T u | d] [disks] [interval [count]]
DESCRIPTION
vmstat reports virtual memory statistics regarding kernel thread, vir‐
tual memory, disk, trap, and CPU activity.
On MP (multi-processor) systems, vmstat averages the number of CPUs
into the output. For per-processor statistics, see mpstat(8).
vmstat only supports statistics for certain devices. For more general
system statistics, use sstore(1), sar(1), iostat(8), or sar(8).
Without options, vmstat displays a one-line summary of the virtual mem‐
ory activity since the system was booted.
During execution of the kernel status command, the state of the system
can change. If relevant, a state change message is included in the vm‐
stat output, in one of the following forms:
<<device added: sd0>>
<<device removed: sd0>>
<<processors added: 1, 3>>
<<processors removed: 1, 3>>
OPTIONS
The following options are supported:
-i Report the number of interrupts per device. count and in‐
terval does not apply to the -i option.
-p Report paging activity in details. This option will display
the following, respectively:
epi Executable page-ins.
epo Executable page-outs.
epf Executable page-frees.
api Anonymous page-ins.
apo Anonymous page-outs.
apf Anonymous page-frees.
fpi File system page-ins.
fpo File system page-outs.
fpf File system page-frees.
When executed in a zone and if the pools facility is ac‐
tive, all of the above only report activity on the proces‐
sors in the processor set of the zone's pool.
-q Suppress messages related to state changes.
-Q Do not print historical information as 1st line of output.
-s Display the total number of various system events since
boot. count and interval does not apply to the -s option.
-S Report on swapping rather than paging activity. This option
will change two fields in vmstat's paging display: rather
than the 're' and 'mf' fields, vmstat will report 'si'
(swap-ins) and 'so' (swap-outs).
-T u | d Specify u for a printed representation of the internal rep‐
resentation of time. See time(2). Specify d for standard
date format. See date(1).
-w Wide display format. Headers will be more descriptive and
two space gap is provided between each column.
Refer to the examples section for sample outputs.
OPERANDS
The following operands are supported:
count Specifies the number of times that the statistics are re‐
peated. count does not apply to the -i and -s options.
disks Specifies which disks are to be given priority in the out‐
put (only four disks fit on a line). Common disk names are
sd, cmdk, or xy, followed by a number (for example, sd2,
xy0, and so forth).
interval Specifies the last number of seconds over which vmstat sum‐
marizes activity. This number of seconds repeats forever.
interval does not apply to the -i and -s options.
EXAMPLES
Example 1 Using vmstat
The following command displays a summary of what the system is doing
every five seconds.
example% vmstat 5
kthr memory page disk faults cpu
r b w swap free re mf pi p fr de sr s0 s1 s2 s3 in sy cs us sy id
0 0 0 11456 4120 1 41 19 1 3 0 2 0 4 0 0 48 112 130 4 14 82
0 0 1 10132 4280 0 4 44 0 0 0 0 0 23 0 0 211 230 144 3 35 62
0 0 1 10132 4616 0 0 20 0 0 0 0 0 19 0 0 150 172 146 3 33 64
0 0 1 10132 5292 0 0 9 0 0 0 0 0 21 0 0 165 105 130 1 21 78
1 1 1 10132 5496 0 0 5 0 0 0 0 0 23 0 0 183 92 134 1 20 79
1 0 1 10132 5564 0 0 25 0 0 0 0 0 18 0 0 131 231 116 4 34 62
1 0 1 10124 5412 0 0 37 0 0 0 0 0 22 0 0 166 179 118 1 33 67
1 0 1 10124 5236 0 0 24 0 0 0 0 0 14 0 0 109 243 113 4 56 39
^C
example%
The fields of vmstat's display are
kthr Report the number of kernel threads in each of the three fol‐
lowing states:
r the number of kernel threads in run queue
b the number of blocked kernel threads that are waiting
for resources I/O, paging, and so forth
w the number of swapped out lightweight processes (LWPs)
that are waiting for processing resources to finish.
memory Report on usage of virtual and real memory.
swap available swap space (Kbytes)
free size of the free list (Kbytes)
page Report information about page faults and paging activity. The
information on each of the following activities is given in
units per second.
re page reclaims — but see the -S option for how this
field is modified.
mf minor faults — but see the -S option for how this field
is modified.
pi kilobytes paged in
po kilobytes paged out
fr kilobytes freed
de anticipated short-term memory shortfall (Kbytes)
sr pages scanned by clock algorithm
When executed in a zone and if the pools facility is active,
all of the above (except for 'de') only report activity on
the processors in the processor set of the zone's pool.
disk Report the number of disk operations per second. There are
slots for up to four disks, labeled with a single letter and
number. The letter indicates the type of disk (s = SCSI and
so forth); the number is the logical unit number.
faults Report the trap/interrupt rates (per second).
in interrupts
sy system calls
cs CPU context switches
When executed in a zone and if the pools facility is active,
all of the above only report activity on the processors in
the processor set of the zone's pool.
cpu Give a breakdown of percentage usage of CPU time. On MP sys‐
tems, this is an average across all processors.
us user time
sy system time
id idle time
When executed in a zone and if the pools facility is active,
all of the above only report activity on the processors in
the processor set of the zone's pool.
Example 2 vmstat wide display sample-1
example% vmstat -w
Kernel_Threads Virtual_Memory Paging_Info Disk_Ops/s Faults_per_sec CPU_Usage
Run Block Wait Swap(KBs) Free(KBs) Reclaim MinorFault PageIn PageOut Freed Def Scan s0 s1 s2 s3 Intr Syscal CPU_Sw User% Sys% Idle% Time
15 0 0 118713700 56911268 16274 141727 14 0 0 0 0 38 38 33 33 9496 129607 5687 21 8 72 Wed Dec 16 21:59:26 PST 2020
Example 3 vmstat wide display sample-2
example% vmstat -Sw
Kernel_Threads Virtual_Memory Paging_Info Disk_Ops/s Faults_per_sec CPU_Usage
Run Block Wait Swap(KBs) Free(KBs) SwapIn SwapOut PageIn PageOut Freed Def Scan s0 s1 s2 s3 Intr Syscal CPU_Sw User% Sys% Idle% Time
15 0 0 118714260 56911844 0 0 14 0 0 0 0 38 38 33 33 9496 129608 5687 21 8 72 Wed Dec 16 21:59:24 PST 2020
Example 4 vmstat wide display sample-3
example% vmstat -wp
Virtual_Memory Paging_Info Executable Anonymous_Pages Filesystem
Swap(KBs) Free(KBs) Reclaim MinorFault Freed Def Scan PageIn PageOut PageFree PageIn PageOut PageFree PageIn PageOut PageFree Time
114023436 52311932 17876 156365 0 0 0 0 0 0 3 0 0 10 0 0 Thu Dec 17 03:04:51 PST 2020
ATTRIBUTES
See attributes(7) for descriptions of the following attributes:
tab() box; cw(2.75i) |cw(2.75i) lw(2.75i) |lw(2.75i) ATTRIBUTE TYPEAT‐
TRIBUTE VALUE _ Availabilitysystem/core-os _ Interface StabilitySee be‐
low
Invocation is evolving. Human readable output is unstable.
SEE ALSO
date(1), sar(1), sstore(1), time(2), attributes(7), iostat(8),
mpstat(8), sar(8)
NOTES
The sum of CPU utilization might vary slightly from 100 because of
rounding errors in the production of a percentage figure.
On some virtualized systems, such as a kernel zone (see solaris-kz(7)),
the sum of CPU utilization reported may be below 100 due to CPU time
stolen by the host system. The mpstat(8) command can be used to report
stolen time.
HISTORY
The -w option was added in Oracle Solaris 11.4.33.
The -Q option was added in Oracle Solaris 11.4.16.
The "wait cpu" line in vmstat -s output was replaced by "stolen time"
in Oracle Solaris 11.2.0.
The -c option was removed in Oracle Solaris 11.0.0.
The -T option was added in Oracle Solaris 11.0.0.
The -q option was added in Solaris 10 3/05.
The -p option was added in Solaris 8.
The -f option was removed in Solaris 2.0.
The vmstat command, including support for the -i, -s, and -S options,
has been included in all Sun and Oracle releases of Solaris.
Oracle Solaris 11.4 23 Jun 2025 vmstat(8)