ADSM-L

Reclamation takes ages

1998-10-02 03:34:19
Subject: Reclamation takes ages
From: "Mauro M. TINELLI" <Mauro.TINELLI AT ST DOT COM>
Date: Fri, 2 Oct 1998 09:34:19 +0200
Richard,

> Mauro - There are two things that come to mind when I see reports of
>         reclamation taking so long...
> 1. Tape drive problems.  A "lost VCR data" condition is a conspicuous
>    example of a drive problem which can aggravate access times by a
>    factor of 10.  See if you can find any errpt or other indications
>    of a hardware problem.
>
normally you get a warning message at the console when the system detect
a "lost VCR data" and this is not the case.

> 2. Reclamation does a lot of database work.  If your cache hit ratio
>    ('q db f=d') is under 98%, boost dbbufpoolsize.
>
cache hit ratio seems to be ok, ==98%. But I'm going to monitor disks
activity through iostat ... there are other tools specific for DB
monitoring?

Thank you

Mauro
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