I've seen this before but on OS/390 not on Aix.
It happens when there is a hung client session. According to IBM this hung
session can in turn
causes a thread to hang in the recovery log which prevents it from
resetting.

(the session cannot be cancelled)

This is why when ADSM is restarted , the thread is released and the recovery
log can reset.

Are you seeing hung sessions?

Nathan


        -----Original Message-----
        From:   Mauro M. TINELLI [SMTP:Mauro.TINELLI AT ST DOT COM]
        Sent:   Thursday, August 26, 1999 11:42 AM
        To:     ADSM-L AT VM.MARIST DOT EDU
        Subject:        Re: DB backup doesn't decrease recovery log
utilization

        Gerhard,

                I had a exactly the same problem. Once, it happened at night
when I'm
        running all the back-ups, so the system after rescheduling 4 times a
DB
        Backup, closed itself up, and the next morning I had to add some log
        space in order to restart the server.

                The log was about 1 Gbyte in size ... now is 5 Gbytes and
the
        DbBackupTrigger is at 55%. It never happened again! he maximum I
reached
        is 75% of log in use. Is it a workaround? I don't know, but it fixed
the
        problem.

        PS. IBM said the problem was known. But they asked me to lower the
DBB
        threshold and it didn't work.

        Mauro, STM

        > Hello,
        > since yesterday I have a problem.
        > I use the recovery log in rollforward mode. When DB backup is
finished,
        > the recovery log utilization is not decreased in any way. I have
to
        > restart the server to accomplish this.
        > An example: I started a backup when the recovery log utilization
was
        > 26.9 %. It was an incremental which finished after about 10
minutes.
        > Afterwards the recovery log utilization was 27.0% and was still
        > increasing. After the restart of the server it was 0.4%.
        > Has anyone seen this behaviour? Any idea what I can do? I will
open a
        > PMR asap.
        > BTW, the server is level 3.1.2.40 on AIX 4.2.1.
        > Best regards
        > Gerhard
        >
        > ---
        > Gerhard Rentschler
email:g.rentschler AT rus.uni-stuttgart DOT de
        > Regional Computing Center     tel.   ++49/711/685 5806
        > University of Stuttgart       fax:   ++49/711/682357
        > Allmandring 30a
        > D 70550
        > Stuttgart
        > Germany