ADSM-L

Re: Cache Hit Percent below 90%

1999-07-30 10:25:40
Subject: Re: Cache Hit Percent below 90%
From: Marita Gonsalves <marita_gonsalves AT CARYACADEMY.PVT.K12.NC DOT US>
Date: Fri, 30 Jul 1999 10:25:40 -0400
        There's  640 mb memory on the server.
        The available space for the db is 8000 mb.
        Page size: 4096.
        Total usable pages: 2048000
        Used pages: 1565443.
        Approx. amount of data being backed: 40GB

        Ciao Mauro asked:

        > Memory?
        > How much memory do you have and how big is the Buffer Pool?
        > How big the DB and how much is in use?

        From: Marita Gonsalves
        > Hello all,
        > I've run into a problem and I want to make sure that the cause is
not
        ADSM
        > before I involve anyone else on this.  Background info:  NT 4.0
        environment,
        > running ADSM server ver. 2 backing up  24 servers.  Running ADSM
client
        ver.
        > 3 on 4 servers.
        >
        > I've noticed that the cahce hit pecrent keeps dropping gradually
over a
        > period of time.  The only way I can fix this is stopping and
starting
        the
        > ADSM server.  I have increased database buffer pool, per the ADSM
        manual
        > suggestion, from 512KB to 1014KB.  The cache hit percent is
currently
        at 77%
        > (I stopped and started the service 2days ago).  The cache wait pct
is
        0.
        > The total buffer requests are very high considering I just reset
the
        buffer
        > pool two days ago:114,983,514.
        >
        > When inventory expiration runs, I've noticed that it takes
anywhere
        from 5 -
        > 8 hours to run.  In the past it never took more than 1.5 - 2 hours
to
        run.
        >
        > Another anomaly: scheduled backups start at 2 a.m. in the morning.
        When I
        > come in at 8:30 a.m. one or two of the clients running ADSM ver. 3
        client is
        > still in process.  In the past, the backups were done by 6 a.m.
No,
        data
        > has not increased.  In fact, the summer is our  slow time and
backups
        should
        > be going a lot faster since the traffic on most of the servers is
        limited.
        > School starts in two weeks and I shudder to think what it will be
like
        if I
        > don't find a fix for this problem.
        >
        > Can anyone tell me what the problem is?  I want to be able to
pre-empt
        any
        > problem before it gets out of control.  I want to be sure that
this is
        not
        > an ADSM problem before I start looking at the network.
        >
        > Any suggestions would be greatly appreciated.  Thanks,
        >
        > Marita Gonsalves
        > IS Consultant
        > Cary Academy
        > 919-677-1946 x4555
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