Saturday, April 15, 2023

ORA-46697: Keystore password required

SQL> show pdbs
    CON_ID CON_NAME                       OPEN MODE  RESTRICTED
---------- ------------------------------ ---------- ----------
         2 PDB$SEED                       READ ONLY  NO
         3 MYPDB1                           READ WRITE NO
SQL> create pluggable database testpdb from MYPDB1;
create pluggable database testpdb from MYPDB1
ERROR at line 1:
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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