I want to find out Solaris process memory usage, but got a bit confused, see if any one can provide me some guidance.
i tend to use prstat -a to get total memory consumption by user (I know prstat likely have a bug that simply sum up the memory, regardless if the memory being shared memory). Based on this command this hvr have a rss size of 121G .
Code:
prstat -a
NPROC USERNAME SWAP RSS MEMORY TIME CPU
6 hvr 120G 121G 47% 3:05:36 0.1%
then goes to ps, only two processes under hvr, with rss of 588400 + 41212 bytes, this appears varied a lot with above prstat output
Code:
$ ps -eo user,pid,project,taskid,args,rss|sort
USER PID PROJECT TASKID COMMAND RSS
hvr 7289 system 881828 /export/home/hvr/HVR_HOME/bin/hvr -r -EHVR_HOME=/export/home/hvr/HVR_HOME -EHVR 41212
hvr 7291 system 881829 /export/home/hvr/HVR_HOME/bin/hvr -r -EHVR_HOME=/export/home/hvr/HVR_HOME -EHVR 588400
goes to prstat -t, the project 881829 and 881829 under hvr have rss of 4594M + 4296M
Code:
$ prstat -T
PID USERNAME SIZE RSS STATE PRI NICE TIME CPU PROCESS/NLWP
8177 hvr 60G 4594M sleep 49 0 1:07:19 0.0% oracle/2
7306 hvr 60G 4296M sleep 59 0 0:31:05 0.0% oracle/2
goes to prstat -J, then the project 881829 and 881829 under hvr have rss of 60G + 61G, which tend to match with prstat -a
Code:
prstat -J
TASKID NPROC SWAP RSS MEMORY TIME CPU PROJECT
881828 1 60G 60G 24% 1:11:55 0.0% system
881829 1 60G 61G 24% 0:33:36 0.0% system
i am very confused, how to accurately find out how much memory process consume in solaris? thanks
Last edited by Don Cragun; 02-13-2016 at 08:48 PM..
Reason: Add CODE AND ICODE tags.
Outside the possible shared segment issue with prstat aggregations, all the commands accurately report how much memory is consumed. The main difference lies with the set of processes that are selected, six with "prstat -a", two with "ps", two different ones with "prstat -T".
You should first define the set of processes you want to measure the memory usage.
Then, a first approximation would be to sum up their RSS and SIZE columns as reported by the ps command. Should you suspect the value is over the actual usage, you can dig up each process memory usage with "pmap -x" and identify which segments are shared and their size.
These 2 Users Gave Thanks to jlliagre For This Post:
if i do a --> prstat -a -u to focus only the processof hvr, following is the output, RSS at top portion and bottom portion just do not close at all. top and bottom portion both showed 2 process (nproc)
Code:
PID USERNAME SIZE RSS STATE PRI NICE TIME CPU PROCESS/NLWP
7291 hvr 709M 627M sleep 59 0 0:42:53 0.0% hvr/1
7289 hvr 90M 40M sleep 59 0 1:33:56 0.0% hvr/1
NPROC USERNAME SWAP RSS MEMORY TIME CPU
2 hvr 121G 121G 47% 2:16:49 0.0%
Total: 2 processes, 2 lwps, load averages: 2.21, 1.90, 1.85
What Solaris release is this?
Are zones involved?
Why was there six processes belonging to hvr in the "prstat -a" first posting output and only two in the last one?
What is the output of "prstat -s rss -c 1 1"?
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