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Oracle Installation guides, Linux Administration tips for DBAs, Performance Tuning tips, Disaster Recovery, RMAN, Dataguard and ORA errors solutions.
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Saturday, April 15, 2023
ORA-46697: Keystore password required
Saturday, April 8, 2023
Investigating "read by other session" Wait Event
This article explains about the wait event “read by other session”. In this article I will explain how to further investigate about SQLs and segments involved in this wait event. This should be noted that unless this wait event is the result of slow IO performance, this wait event has to be tuned at the application side or by tuning the segment. To find out which SQLs and which table/index are causing this wait, we can query v$active_session_history (or DBA_HIST_ACTIVE_SESS_HISTORY); SAMPLE_TIME column can be used in WHERE clause to restrict rows for the event details during a specific period. Alternatively, we can also query v$session_wait to find out sessions currently waiting on this wait event.
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