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High Data Block wait time

Posted on 2006-06-21
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Last Modified: 2008-02-01
I have extremely high data block wait time....

block   73821695
wait      4835256

The script I ran for this is:

select   CLASS,
         COUNT,
         TIME
from     sys.v_$waitstat
order by CLASS;

We are experiencing very bad performance.

Help?

Mike
0
Comment
Question by:mjimison1956
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6 Comments
 
LVL 3

Expert Comment

by:Titan522
ID: 16952027
What version are you running?
0
 

Author Comment

by:mjimison1956
ID: 16953036
version is Oracle 9.2.0.7
0
 
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Accepted Solution

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Titan522 earned 250 total points
ID: 16954690
Are these problems new or been around for a long time? Any increase in users or large amount of data being added or removed?
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Author Comment

by:mjimison1956
ID: 16955167
Have been around, new to the db....  performance has been getting worse and worse.  
0
 
LVL 3

Expert Comment

by:Titan522
ID: 16955187
Sounds like you have out of date stats or are doing a large number of full table scans. Would get some commonly run queries and see what the explain plan is.
0
 
LVL 3

Expert Comment

by:cdemir
ID: 16962919
how about initORA?
0

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