Active Session History (ASH) performed an emergency flush

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Active Session History (ASH) performed an emergency flush. This may mean that ASH is undersized. If emergency flushes are a recurring issue, you may consider increasing ASH size by setting the value of _ASH_SIZE to a sufficiently large value. Currently, ASH size is 83886080 bytes. Both ASH size and the total number of emergency flushes since instance startup can be monitored by running the following query: 
select total_size,awr_flush_emergency_count from v$ash_info; 
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The ASH buffers may need to be increased if the message is logged frequently.

Please review:

Active Session History (ASH) Performed An Emergency Flush Messages In The Alert Log ( Doc ID 1385872.1 )




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