Topic: Database Administration >> what is pmon ?
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| jogi |
Posted: Sep 04, 2007 05:30:23 AM |
Total Post: 21
Joined: Jul, 2007
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| what is the main aim of pmon? |
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 Mohammed Taj |
| Posted: Sep 04, 2007 09:53:59 AM |  |
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Total Post: 746
Joined: Jul, 2007
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Process Monitor Process (PMON)
The process monitor (PMON) performs process recovery when a user process fails. PMON is responsible for cleaning up the database buffer cache and freeing resources that the user process was using. For example, it resets the status of the active transaction table, releases locks, and removes the process ID from the list of active processes.
PMON periodically checks the status of dispatcher and server processes, and restarts any that have stopped running (but not any that Oracle has terminated intentionally). PMON also registers information about the instance and dispatcher processes with the network listener.
Like SMON, PMON checks regularly to see whether it is needed and can be called if another process detects the need for it
reference
http://download.oracle.com/docs/cd/B14117_01/server.101/b10743/process.htm#sthref1570
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