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_kill_enqueue_blocker

edited Jun 18, 2018 3:14PM in Database Administration (MOSC) 4 commentsAnswered
 Hello,

I encountered this night an ORA-00494 due to an IO overload on a production datawarehouse. 
The Io overload was mainly due to a longer than usual archivelog backup concurrently with a tablespace creation script concurrently with BO queries concurrently with ... 

While working on storage causes ( data are stored on SAN but replicated on another bay, which could be the bottleneck cause ) , I have found in Oracle docs the ID 779552.1 about hidden parameters we could use. I'm thinking about implementing the _kill_enqueue_blocker wich would prevent the kill blocker interface to kill any background process implied in the hold of the DB.

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