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kapso
Asked: 2010-05-04 22:10:51 +0800 CST

How to get - number of threads per process?

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This is one Ubuntu 9.10 server.

Also how to see memory usage per process?

Thanks

ubuntu memory threads process

3 Answers

  1. Try this:

    ps axo pid,ppid,rss,vsz,nlwp,cmd

    Output columns:

    • pid - Process ID
    • ppid - Parent Process ID
    • rss - Resident Set Size - physical memory
    • vsz - Virtual Set Size - virtual memory
    • nlwp - Number of Light Weight Processes - thread count
    • cmd - Command
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  2. Use the following to show the memory use of a single process:

    pmap -d <PID>
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  3. Try this little hamster in Perl for a simple system overview (on Linux):

    http://public.m-plify.net/apercu/apercu.pl

    Groups processes by name, e.g. all the processes named "httpd" go into one line; or a special process is given its own line.

    For each group give:

    • total CPU usage used (percent of single CPU, so the total can be over 100%)
    • total mem usage used (percent)
    • total 'rss', 'size', 'sz', 'vsz' used (from 'ps')
    • total number of processes grouped
    • total number of threads managed by the grouped processes
    • total number of file descriptors used by the processes grouped ("FILES")
    • total number of internet sockets used (that value is already included in "FILES")
    • total number of unix domain sockets used (that value is already included in "FILES")
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