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Snapshot Level Database Application |
Logical Data Grouping dbase appl stmt |
Monitor Switch Sort Sort Sort |
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Resettable |
Yes |
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Event Type Database Connection Statement |
Logical Data Grouping db_event conn_event stmt_event |
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Element Name Element Type |
sort_overflows counter |
Description: The total number of sorts that ran out of sort heap and may have required disk space for temporary storage.
Usage: At a database or application level, use this element in conjunction with "Total Sorts" to calculate the percentage of sorts that had to overflow to disk. If this percentage is high, you may want adjust the database configuration by increasing the value of sortheap.
At a statement level, use this element to identify statements that require large sorts. These statements may benefit from additional tuning to reduce the amount of sorting required.
When a sort overflows, additional overhead will be incurred because the sort will require a merge phase and can potentially require more I/O, if data needs to be written to disk.
This element provides information for one statement, one application, or all applications accessing one database.