ADSM-L

Re: Dwindling Performance

2004-01-15 13:00:27
Subject: Re: Dwindling Performance
From: Dwight McCann <dwight AT TRIXIE.ISC.UCSB DOT EDU>
To: ADSM-L AT VM.MARIST DOT EDU
Date: Thu, 15 Jan 2004 09:59:48 -0800
Roger,

I really enjoyed and appreciated your response on this issue, but you've
got me to wondering at bit.  I'm running TSM 5.1.8 on Win2K with 2G
RAM.  I looked at my migration times which are about 20 minutes (so
that's no problem) and then did the Q DB F=D and saw that my Cache Hit
was only 96.81.  You said that if it wasn't 99% it needed help.  I have
it autotuning and here are my outputs:

tsm: DATAPLUS_SERVER1>q actlog begind=-2 search='expiration'

Date/Time                Message
--------------------
----------------------------------------------------------
01/13/2004 19:19:22      ANR0984I Process 177 for EXPIRATION started in the
                         BACKGROUND at 19:19:22.
01/13/2004 19:19:22      ANR0811I Inventory client file expiration
started as
                         process 177.
01/13/2004 19:37:58      ANR0812I Inventory file expiration process 177
completed:
                         examined 437237 objects, deleting 87348 backup
objects, 0
                         archive objects, 0 DB backup volumes, and 0
recovery plan
                         files. 0 errors were encountered.
01/13/2004 19:37:58      ANR0987I Process 177 for EXPIRATION running in the
                         BACKGROUND processed 87348 items with a
completion state
                         of SUCCESS at 19:37:58.
01/14/2004 19:37:58      ANR0984I Process 182 for EXPIRATION started in the
                         BACKGROUND at 19:37:58.
01/14/2004 19:37:58      ANR0811I Inventory client file expiration
started as
                         process 182.
01/14/2004 19:58:20      ANR0812I Inventory file expiration process 182
completed:
                         examined 433897 objects, deleting 104134
backup objects,
                         0 archive objects, 0 DB backup volumes, and 0
recovery
                         plan files. 0 errors were encountered.
01/14/2004 19:58:20      ANR0987I Process 182 for EXPIRATION running in the
                         BACKGROUND processed 104134 items with a
completion state
                         of SUCCESS at 19:58:20.
01/15/2004 09:43:06      ANR2017I Administrator DWIGHT issued command:
QUERY ACTLOG
                         begind=-2 search=expiration

tsm: DATAPLUS_SERVER1>q db f=d

         Available Space (MB): 30,000
       Assigned Capacity (MB): 25,292
       Maximum Extension (MB): 4,708
       Maximum Reduction (MB): 19,564
            Page Size (bytes): 4,096
           Total Usable Pages: 6,474,752
                   Used Pages: 1,442,366
                     Pct Util: 22.3
                Max. Pct Util: 22.7
             Physical Volumes: 2
            Buffer Pool Pages: 32,768
        Total Buffer Requests: 28,394,716
               Cache Hit Pct.: 96.81
              Cache Wait Pct.: 0.00
          Backup in Progress?: No
   Type of Backup In Progress:
 Incrementals Since Last Full: 4
Changed Since Last Backup (MB): 0.98
           Percentage Changed: 0.02
Last Complete Backup Date/Time: 01/15/2004 05:45:26

Is there something I should do to get the cache hits up to 99% even
though I don't yet have a performance issue?  I realize that my
environment is quite small but it is about to double and I'd rather be
proactive.  TIA,

--
Dwight McCann
Computer and Network Technologist, UCSB Info Systems & Computing
Dwight.McCann AT isc.ucsb DOT edu, Dwight AT DwightMcCann DOT com
http://borg.isc.ucsb.edu/dmm/  - office: 805-893-3113

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