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System Administration Commands prstat(1M)
NAME
prstat - report active process statistics
SYNOPSIS
prstat [-acJLmRtTv] [-C psrsetlist] [-j projlist] [-k task-
list] [-n ntop[,nbottom]] [-p pidlist] [-P cpulist] [-s key
| -S key ] [-u euidlist] [-U uidlist] [-z zoneidlist] [-Z]
[interval [count]]
DESCRIPTION
The prstat utility iteratively examines all active processes
on the system and reports statistics based on the selected
output mode and sort order. prstat provides options to exam-
ine only processes matching specified PIDs, UIDs, zone IDs,
CPU IDs, and processor set IDs.
The -j, -k, -C, -p, -P, -u, -U, and -z options accept lists
as arguments. Items in a list can be either separated by
commas or enclosed in quotes and separated by commas or
spaces.
If you do not specify an option, prstat examines all
processes and reports statistics sorted by CPU usage.
OPTIONS
The following options are supported:
-a
Report information about processes and users. In this
mode prstat displays separate reports about processes
and users at the same time.
-c
Print new reports below previous reports instead of
overprinting them.
-C psrsetlist
Report only processes or lwps that are bound to proces-
sor sets in the given list. Each processor set is iden-
tified by an integer as reported by psrset(1M). The load
averages displayed are the sum of the load averages of
the specified processor sets (see pset_getloadavg(3C)).
Processes with one or more LWPs bound to processor sets
in the given list are reported even when the -L option
is not used.
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System Administration Commands prstat(1M)
-j projlist
Report only processes or lwps whose project ID is in the
given list. Each project ID can be specified as either a
project name or a numerical project ID. See project(4).
-J
Report information about processes and projects. In this
mode prstat displays separate reports about processes
and projects at the same time.
-k tasklist
Report only processes or lwps whose task ID is in task-
list.
-L
Report statistics for each light-weight process (LWP).
By default, prstat reports only the number of LWPs for
each process.
-m
Report microstate process accounting information. In
addition to all fields listed in -v mode, this mode also
includes the percentage of time the process has spent
processing system traps, text page faults, data page
faults, waiting for user locks and waiting for CPU
(latency time).
-n ntop[,nbottom]
Restrict number of output lines. The ntop argument
determines how many lines of process or lwp statistics
are reported, and the nbottom argument determines how
many lines of user, task, or projects statistics are
reported if the -a, -t, -T, or -J options are specified.
By default, prstat displays as many lines of output that
fit in a window or terminal. When you specify the -c
option or direct the output to a file, the default
SunOS 5.10 Last change: 13 Sep 2005 2
System Administration Commands prstat(1M)
values for ntop and nbottom are 15 and 5.
-p pidlist
Report only processes whose process ID is in the given
list.
-P cpulist
Report only processes or lwps which have most recently
executed on a CPU in the given list. Each CPU is identi-
fied by an integer as reported by psrinfo(1M).
-R
Put prstat in the real time scheduling class. When this
option is used, prstat is given priority over time-
sharing and interactive processes. This option is avail-
able only for superuser.
-s key
Sort output lines (that is, processes, lwps, or users)
by key in descending order. Only one key can be used as
an argument.
There are five possible key values:
cpu
Sort by process CPU usage. This is the default.
pri
Sort by process priority.
rss
SunOS 5.10 Last change: 13 Sep 2005 3
System Administration Commands prstat(1M)
Sort by resident set size.
size
Sort by size of process image.
time
Sort by process execution time.
-S key
Sort output lines by key in ascending order. Possible
key values are the same as for the -s option. See -s.
-t
Report total usage summary for each user. The summary
includes the total number of processes or LWPs owned by
the user, total size of process images, total resident
set size, total cpu time, and percentages of recent cpu
time and system memory.
-T
Report information about processes and tasks. In this
mode prstat displays separate reports about processes
and tasks at the same time.
-u euidlist
Report only processes whose effective user ID is in the
given list. Each user ID may be specified as either a
login name or a numerical user ID.
-U uidlist
Report only processes whose real user ID is in the given
SunOS 5.10 Last change: 13 Sep 2005 4
System Administration Commands prstat(1M)
list. Each user ID may be specified as either a login
name or a numerical user ID.
-v
Report verbose process usage. This output format
includes the percentage of time the process has spent in
user mode, in system mode, and sleeping. It also
includes the number of voluntary and involuntary context
switches, system calls and the number of signals
received. Statistics that are not reported are marked
with the - sign.
-z zoneidlist
Report only processes or LWPs whose zone ID is in the
given list. Each zone ID can be specified as either a
zone name or a numerical zone ID. See zones(5).
-Z
Report information about processes and zones. In this
mode, prstat displays separate reports about processes
and zones at the same time.
OUTPUT
The following list defines the column headings and the mean-
ings of a prstat report:
PID
The process ID of the process.
USERNAME
The real user (login) name or real user ID.
SIZE
The total virtual memory size of the process, including
SunOS 5.10 Last change: 13 Sep 2005 5
System Administration Commands prstat(1M)
all mapped files and devices, in kilobytes (K), mega-
bytes (M), or gigabytes (G).
RSS
The resident set size of the process (RSS), in kilobytes
(K), megabytes (M), or gigabytes (G). The RSS value is
an estimate provided by proc(4) that might underestimate
the actual resident set size. Users who want to get more
accurate usage information for capacity planning should
use the -x option to pmap(1) instead.
STATE
The state of the process:
cpuN
Process is running on CPU N.
sleep
Sleeping: process is waiting for an event to com-
plete.
run
Runnable: process in on run queue.
zombie
Zombie state: process terminated and parent not
waiting.
stop
Process is stopped.
SunOS 5.10 Last change: 13 Sep 2005 6
System Administration Commands prstat(1M)
PRI
The priority of the process. Larger numbers mean higher
priority.
NICE
Nice value used in priority computation. Only processes
in certain scheduling classes have a nice value.
TIME
The cumulative execution time for the process.
CPU
The percentage of recent CPU time used by the process.
If executing in a non-global zone and the pools facility
is active, the percentage will be that of the processors
in the processor set in use by the pool to which the
zone is bound.
PROCESS
The name of the process (name of executed file).
LWPID
The lwp ID of the lwp being reported.
NLWP
The number of lwps in the process.
With the some options, in addition to a number of the column
headings shown above, there are:
SunOS 5.10 Last change: 13 Sep 2005 7
System Administration Commands prstat(1M)
NPROC Number of processes in a specified collec-
tion.
MEMORY Percentage of memory used by a specified
collection of processes.
The following columns are displayed when the -v or -m option
is specified
USR The percentage of time the process has spent
in user mode.
SYS The percentage of time the process has spent
in system mode.
TRP The percentage of time the process has spent
in processing system traps.
TFL The percentage of time the process has spent
processing text page faults.
DFL The percentage of time the process has spent
processing data page faults.
LCK The percentage of time the process has spent
waiting for user locks.
SLP The percentage of time the process has spent
sleeping.
LAT The percentage of time the process has spent
waiting for CPU.
SunOS 5.10 Last change: 13 Sep 2005 8
System Administration Commands prstat(1M)
VCX The number of voluntary context switches.
ICX The number of involuntary context switches.
SCL The number of system calls.
SIG The number of signals received.
Under the -L option, one line is printed for each lwp in the
process and some reporting fields show the values for the
lwp, not the process.
OPERANDS
The following operands are supported:
count Specifies the number of times that the
statistics are repeated. By default, prstat
reports statistics until a termination sig-
nal is received.
interval Specifies the sampling interval in seconds;
the default interval is 5 seconds.
EXAMPLES
Example 1: Reporting the Five Most Active Super-User
Processes
The following command reports the five most active super-
user processes running on CPU1 and CPU2:
example% prstat -u root -n 5 -P 1,2 1 1
PID USERNAME SIZE RSS STATE PRI NICE TIME CPU PROCESS/LWP
306 root 3024K 1448K sleep 58 0 0:00.00 0.3% sendmail/1
102 root 1600K 592K sleep 59 0 0:00.00 0.1% in.rdisc/1
250 root 1000K 552K sleep 58 0 0:00.00 0.0% utmpd/1
288 root 1720K 1032K sleep 58 0 0:00.00 0.0% sac/1
1 root 744K 168K sleep 58 0 0:00.00 0.0% init/1
TOTAL: 25, load averages: 0.05, 0.08, 0.12
SunOS 5.10 Last change: 13 Sep 2005 9
System Administration Commands prstat(1M)
Example 2: Displaying Verbose Process Usage Information
The following command displays verbose process usage infor-
mation about processes with lowest resident set sizes owned
by users root and john.
example% prstat -S rss -n 5 -vc -u root,john
PID USERNAME USR SYS TRP TFL DFL LCK SLP LAT VCX ICX SCL SIG PROCESS/LWP
1 root 0.0 0.0 - - - - 100 - 0 0 0 0 init/1
102 root 0.0 0.0 - - - - 100 - 0 0 3 0 in.rdisc/1
250 root 0.0 0.0 - - - - 100 - 0 0 0 0 utmpd/1
1185 john 0.0 0.0 - - - - 100 - 0 0 0 0 csh/1
240 root 0.0 0.0 - - - - 100 - 0 0 0 0 powerd/4
TOTAL: 71, load averages: 0.02, 0.04, 0.08
EXIT STATUS
The following exit values are returned:
0 Successful completion.
1 An error occurred.
ATTRIBUTES
See attributes(5) for descriptions of the following attri-
butes:
____________________________________________________________
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
|_____________________________|_____________________________|
| Availability | SUNWcsu |
|_____________________________|_____________________________|
SEE ALSO
proc(1), psrinfo(1M), psrset(1M), sar(1M),
pset_getloadavg(3C), proc(4), project(4), attributes(5),
zones(5)
NOTES
The snapshot of system usage displayed by prstat is true
only for a split-second, and it may not be accurate by the
time it is displayed. When the -m option is specified,
prstat tries to turn on microstate accounting for each pro-
cess; the original state is restored when prstat exits. See
proc(4) for additional information about the microstate
accounting facility.
SunOS 5.10 Last change: 13 Sep 2005 10
System Administration Commands prstat(1M)
The total memory size reported in the SIZE and RSS columns
for groups of processes can sometimes overestimate the
actual amount of memory used by processes with shared memory
segments.
SunOS 5.10 Last change: 13 Sep 2005 11
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