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  • 1.  Strange memory problem

    Posted Wed January 02, 2008 11:43 AM

    Originally posted by: SystemAdmin


    Rather curious problem:

    System:

    RS/6000 Model = IBM,9110-51A
    5300-05-00
    4 GB memory

    I seem to have "lost" approximately 400MB of memory within a period of 15 minutes.

    I monitor my system with an svmon script that runs every 15 minutes

    Here are the stats:

    (Between 10:00 and 10:15)

    1000

    size inuse free pin virtual
    memory 1003520 878493 125027 93931 719832
    pg space 1769472 2008

    work pers clnt
    pin 93931 0 0
    in use 719832 0 158661

    PageSize PoolSize inuse pgsp pin virtual
    s 4 KB - 854973 2008 80411 696312
    m 64 KB - 1470 0 845 1470

    196760 java 194739 7771 0 183660 N Y N
    155758 java 194429 7776 0 182341 N Y N
    221294 java 188127 7757 0 177252 N Y N
    217198 java 76542 7746 0 65870 N Y N
    127190 java 60059 7755 0 49418 N Y N
    241782 xmwlm 18405 7683 0 18281 N N N
    258176 rmcd 17395 7685 0 17020 N Y N
    245888 IBM.CSMAgentR 17335 7696 0 17195 N Y N
    282780 IBM.ERrmd 17273 7696 0 17142 N Y N
    229500 IBM.AuditRMd 17185 7692 0 17068 N Y N

    1015

    size inuse free pin virtual
    memory 1003520 963200 40320 175648 803552
    pg space 1769472 2179

    work pers clnt
    pin 175648 0 0
    in use 803508 0 159692

    PageSize PoolSize inuse pgsp pin virtual
    s 4 KB - 939072 2179 162016 779424
    m 64 KB - 1508 0 852 1508

    196760 java 195005 7771 0 183908 N Y N
    155758 java 194678 7776 0 182590 N Y N
    221294 java 188375 7757 0 177500 N Y N
    217198 java 76790 7746 0 66118 N Y N
    127190 java 60309 7755 0 49667 N Y N
    241782 xmwlm 18656 7683 0 18529 N N N
    258176 rmcd 17643 7685 0 17268 N Y N
    245888 IBM.CSMAgentR 17583 7696 0 17443 N Y N
    282780 IBM.ERrmd 17521 7696 0 17390 N Y N
    229500 IBM.AuditRMd 17433 7692 0 17316 N Y N
    Notice the difference in Free Pages (The memory was never returned)

    (The java processes are WebSphere)

    I looked at all the WebSphere logs and do not see any irregularities.

    I also examined the system logs and can't find anything strange

    Has anyone else seen something like this?

    I also posted this in the WebSphere forum.

    Thanks!

    DaveZ


  • 2.  Re: Strange memory problem (Update)

    Posted Wed January 02, 2008 01:09 PM

    Originally posted by: SystemAdmin


    Here's an update (Even though it appears very strange)

    I noticed that at 10:14 I installed:

    lsof-4.61-4.aix5.3.ppc.rpm

    Just a coincidence maybe?

    Thanks!

    DaveZ


  • 3.  Re: Strange memory problem