Tuesday, June 14, 2011

Extensive Full Table Scan Access Wait

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Table extensively accessed via Full Table Scans.
Extensive Full Table Scan Access findings

Description
What to do next
Perform the following options:
n   Examine associated statements in the Statements tab. Focus on Full Table Scan access types in the Access Types table.
n   Examine column usage for each statement in the Columns table.
Advice
Perform one of the following options:
n   Eliminate Full Table Scan by:
Trying to identify common high selectivity columns for the top statements. Create an index matching the statements predicates.
Partitioning the table according to the best predicates existing in the statements.
n   Improve Full Table Scan by:
Moving the table to another tablespace with a higher block size.
Increasing the value of the DB_FILE_MULTIBLOCK_READ_COUNT init.ora parameter.



  
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