Oracle-L: RE: Tablespace Design

From: DENNIS WILLIAMS <DWILLIAMS_at_LIFETOUCH.COM>
Date: Wed, 28 Aug 2002 08:52:14 -0800
Message-ID: <F001.004C1937.20020828085214@fatcity.com>

Pawan - The gurus are sleeping in this morning, so you're stuck with the "aspiring guru". According to Oracle's documentation, v$waitstat breaks buffer waits down by block class. You may be better off starting with v$system_event and v$session_event and if this shows a lot of buffer busy waits, then key in on v$waitstat. You might get a copy of Gaja's book "Oracle Performance Tuning 101". Then you'll really impress him.

If you have everything on a single drive, tablespace design probably isn't going to buy you much in terms of performance. Myself, I would tend to tune the memory buffer cache first in this situation. You may also want to consider adding more drives, depending on how you plan to use this database.

Dennis Williams
DBA
Lifetouch, Inc.
dwilliams_at_lifetouch.com

-----Original Message-----
Sent: Wednesday, August 28, 2002 3:13 AM To: Multiple recipients of list ORACLE-L

Hi DBA gurus,

One of the application is going live .At presenr data is 15GB and will grow more by 10 GB in year time. What is the right approach of tablespace design having more files of smaller size(10 files of 2 GB ) or less file of bigger size (3 files of 8 gb ). No tables in this application is partitioned all the files will be on a single disk I am Orcale 8.1.7 on Win 2K.

2) Following is output of my v$waitstat . Kinly give som suggestions

CLASS                   COUNT       TIME
------------------ ---------- ----------
data block              46251          0
sort block                  0          0
save undo block             0          0
segment header             15          0
save undo header            0          0
free list                   0          0
extent map                  0          0
bitmap block                0          0
bitmap index block          0          0
unused                      0          0
system undo header          0          0
system undo block           0          0
undo header              1225          0
undo block                 55          0

Regards
Pawan Dalmia

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Author: Pawan Dalmia
INET: Pawan.Dalmia_at_orange.co.in

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Author: DENNIS WILLIAMS
INET: DWILLIAMS_at_LIFETOUCH.COM

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