PS command: Memory and CPU Usage

we can use ps command to get the details of processes running on system in a efficient manner. 


This is useful when you are monitoring system processes.





# ps -eo s,pid,ppid,user,group,rss,vsz,pcpu,pmem,time,etime,tty,args

S   PID  PPID     USER    GROUP  RSS  VSZ %CPU %MEM        TIME     ELAPSED TT      COMMAND
T     0     0     root     root    0    0  0.0  0.0       00:03 21-18:38:05 ?       sched
S     1     0     root     root 1920 2512  0.0  0.1       00:05 21-18:38:05 ?       /sbin/init
S     2     0     root     root    0    0  0.0  0.0       00:00 21-18:38:05 ?       pageout
S     3     0     root     root    0    0  0.3  0.0    01:22:51 21-18:38:05 ?       fsflush
S   203     1   daemon   daemon 2160 2456  0.0  0.1       00:00 21-18:37:49 ?       /usr/lib/nfs/lockd
S     7     1     root     root 9904 12960  0.0  0.2       00:30 21-18:38:03 ?       /lib/svc/bin/svc.startd
S     9     1     root     root 9704 10384  0.0  0.2       00:38 21-18:38:03 ?       /lib/svc/bin/svc.configd
S   183     1   daemon   daemon 2360 2848  0.0  0.1       00:10 21-18:37:50 ?       /usr/sbin/rpcbind
S   113     1     root     root 2856 5768  0.0  0.1       00:00 21-18:37:54 ?       /usr/lib/picl/picld
S   197     7     root     root 1624 2120  0.0  0.1       00:01 21-18:37:49 ?       /usr/lib/saf/sac -t 300
S   190     1   daemon   daemon 2432 2752  0.0  0.1       00:00 21-18:37:50 ?       /usr/lib/nfs/statd
S   205   197     root     root 1888 2392  0.0  0.1       00:01 21-18:37:49 ?       /usr/lib/saf/ttymon
S   192     1     root     root 2232 2456  0.0  0.1       00:00 21-18:37:50 ?       /usr/lib/netsvc/yp/ypbind
S   253   251     root     root 3160 7464  0.0  0.1       00:07 21-18:37:49 ?       /usr/lib/autofs/automountd
S   121     1   daemon   daemon 3528 6944  0.1  0.1       00:01 21-18:37:54 ?       /usr/lib/crypto/kcfd
S   119     1     root     root 4232 4576  0.0  0.1       01:10 21-18:37:54 ?       /usr/sbin/nscd
S   202     1     root     root 1176 1360  0.0  0.0       00:04 21-18:37:49 ?       /usr/lib/utmpd
S   104     1     root     root 2080 4856  0.0  0.1       00:00 21-18:37:54 ?       /usr/lib/sysevent/syseventd
O   629   626     root     root 3576 10536  0.0  0.1       00:00       00:04 ?       /usr/lib/ssh/sshd
S   239     1     root     root 1712 5000  0.0  0.1       00:00 21-18:37:49 ?       /usr/sbin/cron
S   238     1     root     root 4664 7888  0.0  0.1       00:25 21-18:37:49 ?       /usr/lib/inet/inetd start
S   251     1     root     root 2720 7120  0.0  0.1       00:00 21-18:37:49 ?       /usr/lib/autofs/automountd
S   631   629     root     root 1592 3736  0.0  0.1       00:00       00:04 pts/1   -ksh
S   267     1     root     root 2584 6120  0.0  0.1       00:02 21-18:37:48 ?       /usr/sbin/syslogd
S   626   299     root     root 6616 10984  0.1  0.1       00:00       00:09 ?       /usr/lib/ssh/sshd
S   288     1     root     root 1448 2168  0.0  0.1       00:00 21-18:37:48 ?       /usr/lib/ldoms/drd
S   299     1     root     root 2528 6320  0.0  0.1       00:00 21-18:37:48 ?       /usr/lib/ssh/sshd
S   302     1     root     root 9400 15000  0.0  0.2       00:23 21-18:37:48 ?       /usr/lib/fm/fmd/fmd

=========================================================================
A brief explanation of output:
=========================================================================
S: State of the process
-----------> S: Sleeping,
-----------> O: Runing on processor,
-----------> R: Runnable (it is in run queue),
-----------> Z: Zombie,
-----------> T: Stopped process (either by a job control signal or because it is being traced)
PID: Process ID
PPID: Parent process ID
USER: User name who initiated process
GROUP: Group name from whom user belong/currently launched the job
RSS: The resident set size of the process, in kilobytes.
VSZ:The total size of the process in virtual memory, in kilobytes.
%CPU: Total % of CPU taken by this process
%MEM: Total % of Memory taken by this process
TIME: the cumulative CPU time of the process in the form
ELAPSED: Total time elapsed since this process is live
TT: Terminal ID
COMMAND: Command/daemon/process with args
=========================================================================

Author : LazySystemAdmin

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