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Statement I/O is spent on scattered I/O (usually representing a full scan) on the table specified in the Object column.
| Description | |
| What to do next | Perform one of the following options: n Click the Locate icon to find the relevant step in the execution plan. n Select the findings type to investigate the objects used and their structure in the Objects tab. n Select the Activity workspace, locate the statement associated with objects, and drill to the table consumption for the statement in the Activity workspace |
| Advice | To reduce the I/O consumption for the table, consider the following solutions: n Create an index matching the statement's predicates. n Change the DB_FILE_MULTIBLOCK_READ_COUNT parameter in INIT.ORA to a higher value. n Partition the table according to the best predicates existing in the statement. n Use a parallel query option. n Move the table to another tablespace with a higher block size. Findings refer to the whole statement - not to a specific execution plan. If a step doesn't exist in the selected execution plan (unless this is the result of an index overhead), switch to another plan and locate the relevant step. |
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