Failure of User Process
When a user process fails, what background process cleans up after it?
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Dhaval PatelPosted Jan 20, 2012, 12:20 AM
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.
When user process fails than PMON is clean up all memory and other allocated resources to a given user process
than background process clean up by PMON