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Default Isolation Levels across database systems

20 September,2021 by Rambler

The isolation levels define which database objects  are locked and how long that lock is held for. They are one of the critical concepts related to concurrency in transactions.There is a fair amount of variety across DBMS types.


DB2 LUW     - CS Isolation with CUR_COMMIT enabled

SQL Server -   Read Committed   

MySQL  - Repeatable Read 

MariaDB - Repeatable Read

Oracle - Read Committed 

MongoDB - Read uncommitted

PostgreSQL - Read Committed





Author: Rambler (


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