db2 resources on linux

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  • Jean-Marc Blaise
    #1

    db2 resources on linux

    Dear all,

    I have 2 short questions on resources taken by DB2 on linux, after a
    db2start:

    1) Why do we have 3 db2ckpw processes started by the db2sysc process, to
    check the user authentication, and not only 1 ?

    2) Why is there a shared memory (22 Mb) taken by the fenced user, even if I
    set FENCED_POOL = 0 in the dbm cfg ?

    I would like to know if there is a way to limit these resources.

    Regards,

    Jean-Marc


    Tags: None
    • PM \(pm3iinc-nospam\)
      #2
      Re: db2 resources on linux

      In v8 fp1 they introduced DB2_FMP_COMM_HE APSZ. (+- 20 mb is the default)
      Could this db2set variable relate to your question?

      PM

      "Jean-Marc Blaise" <nobody@nowhere .com> a écrit dans le message de
      news:br81f2$b33 $1@news-reader2.wanadoo .fr...[color=blue]
      > Dear all,
      >
      > I have 2 short questions on resources taken by DB2 on linux, after a
      > db2start:
      >
      > 1) Why do we have 3 db2ckpw processes started by the db2sysc process, to
      > check the user authentication, and not only 1 ?
      >
      > 2) Why is there a shared memory (22 Mb) taken by the fenced user, even if[/color]
      I[color=blue]
      > set FENCED_POOL = 0 in the dbm cfg ?
      >
      > I would like to know if there is a way to limit these resources.
      >
      > Regards,
      >
      > Jean-Marc
      >
      >[/color]


        Comment

        • Jean-Marc Blaise
          #3
          Re: db2 resources on linux

          Hi PM,

          Thats's it; thanks for your pointing; but I did not find this register in
          the FP1 release notes. I think there is a strange behavior: if FENCED_POOL =
          0 why allocating this 20 Mb memory ? Besides, I open a new thread for an
          instance crash related to this register.

          Thanks,

          Jean-Marc

          "PM (pm3iinc-nospam)" <PM(pm3iinc-nospam)@sympati co.ca> a écrit dans le
          message de news:qCNBb.3250 $aF2.477035@new s20.bellglobal. com...[color=blue]
          > In v8 fp1 they introduced DB2_FMP_COMM_HE APSZ. (+- 20 mb is the default)
          > Could this db2set variable relate to your question?
          >
          > PM
          >
          > "Jean-Marc Blaise" <nobody@nowhere .com> a écrit dans le message de
          > news:br81f2$b33 $1@news-reader2.wanadoo .fr...[color=green]
          > > Dear all,
          > >
          > > I have 2 short questions on resources taken by DB2 on linux, after a
          > > db2start:
          > >
          > > 1) Why do we have 3 db2ckpw processes started by the db2sysc process, to
          > > check the user authentication, and not only 1 ?
          > >
          > > 2) Why is there a shared memory (22 Mb) taken by the fenced user, even[/color][/color]
          if[color=blue]
          > I[color=green]
          > > set FENCED_POOL = 0 in the dbm cfg ?
          > >
          > > I would like to know if there is a way to limit these resources.
          > >
          > > Regards,
          > >
          > > Jean-Marc
          > >
          > >[/color]
          >
          >[/color]


            Comment

            • Jean-Marc Blaise
              #4
              Re: db2 resources on linux

              PM, I Just forgot to add that looking for "FENCED_POO L" or
              "DB2_FMP_COMM_H EAPSZ" is really a miserable task with the DB2 Information
              Center. I still keep looking in the PDFs, I have more chance to find related
              information quicker.

              Cheers,

              Jean-Marc

              "Jean-Marc Blaise" <nobody@nowhere .com> a écrit dans le message de
              news:br95lc$qda $1@news-reader3.wanadoo .fr...[color=blue]
              > Hi PM,
              >
              > Thats's it; thanks for your pointing; but I did not find this register in
              > the FP1 release notes. I think there is a strange behavior: if FENCED_POOL[/color]
              =[color=blue]
              > 0 why allocating this 20 Mb memory ? Besides, I open a new thread for an
              > instance crash related to this register.
              >
              > Thanks,
              >
              > Jean-Marc
              >
              > "PM (pm3iinc-nospam)" <PM(pm3iinc-nospam)@sympati co.ca> a écrit dans le
              > message de news:qCNBb.3250 $aF2.477035@new s20.bellglobal. com...[color=green]
              > > In v8 fp1 they introduced DB2_FMP_COMM_HE APSZ. (+- 20 mb is the default)
              > > Could this db2set variable relate to your question?
              > >
              > > PM
              > >
              > > "Jean-Marc Blaise" <nobody@nowhere .com> a écrit dans le message de
              > > news:br81f2$b33 $1@news-reader2.wanadoo .fr...[color=darkred]
              > > > Dear all,
              > > >
              > > > I have 2 short questions on resources taken by DB2 on linux, after a
              > > > db2start:
              > > >
              > > > 1) Why do we have 3 db2ckpw processes started by the db2sysc process,[/color][/color][/color]
              to[color=blue][color=green][color=darkred]
              > > > check the user authentication, and not only 1 ?
              > > >
              > > > 2) Why is there a shared memory (22 Mb) taken by the fenced user, even[/color][/color]
              > if[color=green]
              > > I[color=darkred]
              > > > set FENCED_POOL = 0 in the dbm cfg ?
              > > >
              > > > I would like to know if there is a way to limit these resources.
              > > >
              > > > Regards,
              > > >
              > > > Jean-Marc
              > > >
              > > >[/color]
              > >
              > >[/color]
              >
              >[/color]


                Comment

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