Sunday, 25 March 2018

Understanding System Monitor Process in Oracle Database

Quick reference to System Monitor (SMON) process in Oracle Database

What is a System Monitor SMON Process in Oracle Architecture and What it does?

System Monitor Process SMON in Oracle Architecture


In Oracle Database Startup, SMON plays the major role. It helps in mounting and opening the oracle database.The task begins with identifying the required control file and then validating the existence of all the datafiles and log files mentioned in the same. After the validation check is done, it then opens the database to run the transactions. After the transaction/queries start running in Oracle Database, it helps in some internal tasks like maintaining the free space in datafiles etc.

Please also read - Detailed explanation to Oracle SMON process in Oracle Background Process Architecture (Soon to be updated)

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