User Commands sar(1)
NAME
sar - system activity reporter
SYNOPSIS
sar [-aAbcdgkmpqruvwy] [-o filename] t [n]
sar [-aAbcdgkmpqruvwy] [-e time] [-f filename] [-i sec]
[-s time]
DESCRIPTION
In the first instance, the sar utility samples cumulative
activity counters in the operating system at n intervals of
t seconds, where t should be 5 or greater. If t is specified
with more than one option, all headers are printed together
and the output can be difficult to read. (If the sampling
interval is less than 5, the activity of sar itself can
affect the sample.) If the -o option is specified, it saves
the samples in filename in binary format. The default value
of n is 1.
In the second instance, no sampling interval is specified.
sar extracts data from a previously recorded filename,
either the one specified by the -f option or, by default,
the standard system activity daily data file
/var/adm/sa/sadd for the current day dd. The starting and
ending times of the report can be bounded using the -e and
-s arguments with time specified in the form hh[:mm[:ss].
The -i option selects records at sec second intervals. Oth-
erwise, all intervals found in the data file are reported.
OPTIONS
The following options modify the subsets of information
reported by sar.
-a Reports use of file access system routines:
iget/s, namei/s, dirblk/s
-A Reports all data. Equivalent to
-abcdgkmpqruvwy.
-b Reports buffer activity:
bread/s, bwrit/s transfers per second of
data between system
buffers and disk or other
block devices.
SunOS 5.11 Last change: 24 Jul 2004 1
User Commands sar(1)
lread/s, lwrit/s accesses of system
buffers.
%rcache, %wcache cache hit ratios, that
is, (1-bread/lread) as a
percentage.
pread/s, pwrit/s transfers using raw (phy-
sical) device mechanism.
If run in a non-global zone and the pools
facility is active, these values reflect
activity on the processors of the processor
set of the pool to which the zone is bound.
-c Reports system calls:
scall/s
system calls of all types.
sread/s, swrit/s, fork/s, exec/s
specific system calls.
rchar/s, wchar/s
characters transferred by read and write
system calls. No incoming or outgoing
exec(2) and fork(2) calls are reported.
If run in a non-global zone and the pools
facility is active, these values reflect
activity on the processors of the processor
set of the pool to which the zone is bound.
-d Reports activity for each block device (for
example, disk or tape drive) with the excep-
tion of XDC disks and tape drives. When data
is displayed, the device specification dsk-
is generally used to represent a disk drive.
The device specification used to represent a
tape drive is machine dependent. The activity
data reported is:
SunOS 5.11 Last change: 24 Jul 2004 2
User Commands sar(1)
%busy, avque portion of time
device was busy
servicing a
transfer request,
average number of
requests outstand-
ing during that
time.
read/s, write/s, blks/s number of
read/write
transfers from or
to device, number
of bytes
transferred in
512-byte units.
avwait average wait time
in milliseconds.
avserv average service
time in mil-
liseconds.
For more general system statistics, use
iostat(1M), sar(1M), or vmstat(1M).
See System Administration Guide: Advanced
Administration for naming conventions for
disks.
-e time Selects data up to time. Default is 18:00.
-f filename Uses filename as the data source for sar.
Default is the current daily data file
/var/adm/sa/sadd.
-g Reports paging activities:
pgout/s page-out requests per second.
ppgout/s pages paged-out per second.
SunOS 5.11 Last change: 24 Jul 2004 3
User Commands sar(1)
pgfree/s pages per second placed on the
free list by the page stealing
daemon.
pgscan/s pages per second scanned by the
page stealing daemon.
%ufsipf the percentage of UFS inodes
taken off the freelist by iget
which had reusable pages associ-
ated with them. These pages are
flushed and cannot be reclaimed
by processes. Thus, this is the
percentage of igets with page
flushes.
If run in a non-global zone and the pools
facility is active, these values reflect
activity on the processors of the processor
set of the pool to which the zone is bound.
-i sec Selects data at intervals as close as possi-
ble to sec seconds.
-k Reports kernel memory allocation (KMA)
activities:
smlmem, alloc, fail information about the
memory pool reserving
and allocating space
for small requests:
the amount of memory
in bytes KMA has for
the small pool, the
number of bytes allo-
cated to satisfy
requests for small
amounts of memory,
and the number of
requests for small
amounts of memory
that were not satis-
fied (failed).
lgmem, alloc, fail information for the
large memory pool
(analogous to the
SunOS 5.11 Last change: 24 Jul 2004 4
User Commands sar(1)
information for the
small memory pool).
ovszalloc, fail the amount of memory
allocated for over-
size requests and the
number of oversize
requests which could
not be satisfied
(because oversized
memory is allocated
dynamically, there is
not a pool).
-m Reports message and semaphore activities:
msg/s, sema/s primitives per second.
If run in a non-global zone and the pools
facility is active, these values reflect
activity on the processors of the processor
set of the pool to which the zone is bound.
-o filename Saves samples in file, filename, in binary
format.
-p Reports paging activities:
atch/s page faults per second that are
satisfied by reclaiming a page
currently in memory (attaches per
second).
pgin/s page-in requests per second.
ppgin/s pages paged-in per second.
pflt/s page faults from protection errors
per second (illegal access to
page) or "copy-on-writes".
vflt/s address translation page faults
per second (valid page not in
SunOS 5.11 Last change: 24 Jul 2004 5
User Commands sar(1)
memory).
slock/s faults per second caused by
software lock requests requiring
physical I/O.
If run in a non-global zone and the pools
facility is active, these values reflect
activity on the processors of the processor
set of the pool to which the zone is bound.
-q Reports average queue length while occupied,
and percent of time occupied:
runq-sz, %runocc Run queue of kernel
threads in memory and
runnable
swpq-sz, %swpocc Swap queue of processes
-r Reports unused memory pages and disk blocks:
freemem average pages available to user
processes.
freeswap disk blocks available for page
swapping.
-s time Selects data later than time in the form
hh[:mm]. Default is 08:00.
-u Reports CPU utilization (the default):
%usr, %sys, %wio, %idle portion of time
running in user
mode, running in
system mode, idle
with some process
waiting for block
I/O, and otherwise
idle.
If run in a non-global zone and the pools
SunOS 5.11 Last change: 24 Jul 2004 6
User Commands sar(1)
facility is active, these values reflect
activity on the processors of the processor
set of the pool to which the zone is bound.
-v Reports status of process, i-node, file
tables:
proc-sz, inod-sz, file-sz, lock-sz
entries/size for each table, evaluated
once at sampling point.
ov
overflows that occur between sampling
points for each table.
-w Reports system swapping and switching
activity:
swpin/s, swpot/s, bswin/s, bswot/s
number of transfers and number of 512-
byte units transferred for swapins and
swapouts (including initial loading of
some programs).
pswch/s
process switches.
If run in a non-global zone and the pools
facility is active, these values reflect
activity on the processors of the processor
set of the pool to which the zone is bound.
-y Reports TY device activity:
rawch/s, canch/s, outch/s input character
rate, input
character rate
processed by
canon, output
character rate.
SunOS 5.11 Last change: 24 Jul 2004 7
User Commands sar(1)
rcvin/s, xmtin/s, mdmin/s receive,
transmit and
modem interrupt
rates.
If run in a non-global zone and the pools
facility is active, these values reflect
activity on the processors of the processor
set of the pool to which the zone is bound.
EXAMPLES
Example 1 Viewing System Activity
The following example displays today's CPU activity so far:
example% sar
Example 2 Watching System Activity Evolve
To watch CPU activity evolve for 10 minutes and save data:
example% sar -o temp 60 10
Example 3 Reviewing Disk and Tape Activity
To later review disk and tape activity from that period:
example% sar -d -f temp
FILES
/var/adm/sa/sadd daily data file, where dd are digits
representing the day of the month
ATRIBUTES
See attributes(5) for descriptions of the following attri-
butes:
SunOS 5.11 Last change: 24 Jul 2004 8
User Commands sar(1)
ATRIBUTE TYPE ATRIBUTE VALUE
Availability SUNWaccu
SEE ALSO
sag(1), iostat(1M), sar(1M), vmstat(1M), exec(2), fork(2),
attributes(5)
System Administration Guide: Advanced Administration
NOTES
The sum of CPU utilization might vary slightly from 100
because of rounding errors in the production of a percentage
figure.
SunOS 5.11 Last change: 24 Jul 2004 9
|
