Queries Generating High "Cell Single Block Physical Read" Wait Messages (Doc ID 2119510.1)

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Symptoms

Symptoms of this issue will appear as follows:

• Trace file entries that look similar to the following:

• The "Top 10 Foreground Events by Total Wait Time" section of the AWR report shows an exceedingly high number of waits but few to no average wait time. For example:

• All or most of the events in the "Top SQL with Top Events" section of the ASH report are INDEX - STORAGE FAST FULL SCAN.

Cause

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