From: Mike Knight, ISSC Aerospace, (314)234-5096, KNIGHTM at ISSCVM
Inet:                                             KNIGHTM AT VNET.IBM DOT COM
Subject: Re: ADSM log space

We have had the recovery log randomly fill up on two systems, AIX 3.2.5 w/
ADSM 1.2.9 and AIX 4.1.4 w/ ADSM 2.1.0.8.  We opened a problem with IBM and
the suggestion was to reduce TXNBYTELIMIT to 2048 from 25600 on all clients.
We are still in the process of implementing and monitoring this, so I can't
say if this is the real solution.  We now have 800MB allocated to the log.

The recovery log also grows if a client backup starts while an ADSM
database backup is in progress on ADSM V2.  We are running LOGMODE=NORMAL.

On Fri, 13 Sep 1996 16:44:41 EDT, Paul Zarnowski added:
>We have seen this too.  I have not been able to figure out what causes the
>log to fill up.  It seems to happen randomly.  Normally, the log doesn't get
>more than 10-20% full, but every once in awhile it fills up.  My "solution"
>to this problem is to keep a bit of extra space available, but not allocated
>in the log.  When the log fills up, I simply "EXTEND LOG" to give it an
>extra 4M of space.  This usually allows things to free up.  I have also
>expanded the log (several times now, actually).  Not a great way to solve
>the problem, but it does help.  Frankly, I think there is some sort of bug
>or design deficiency lurking about here, as I don't think this is reasonable
>behaviour for ADSM.
>
>On Fri, 13 Sep 1996 15:27:31 -0600 Bob Booth - CSO said:
>>For the last two days, I have had the unfortunate experience of my recovery
>>log filling and stopping all function of ADSM.  The only way that I can
>>get it going, is to add more log space.  This is a fix, but there will be
>>some day when I can't add log space.  How do I get the recover log to
>>flush?  If I halt my server with a RL at 101% do I loose data, or does the
>>RL flush?
>>
>>Does anyone know why the RL is filling?  It seems to be doing this at a
>>seemingly idle period.  It has also started happening after going to R9
>>just a few weeks ago.
>>
>>It is an AIX 3.2.5 server, running ADSM V2 R1 M9

         Mike (personal opinion, not ADSM support) Knight