Oracle Database 19c introduced a powerful feature for multitenant environments: the ability to run Automatic Database Diagnostic Monitor (ADDM) analysis on individual pluggable databases (PDBs). With ADDM analysis at the PDB level, administrators can now focus on specific performance issues within a single PDB, making it easier to tune and optimize performance in a multitenant […]
What is histogram? In Oracle, a histogram is a specialized column statistic that provides detailed information about data distribution within a column, aiding the Cost-Based Optimizer (CBO) in selecting the most efficient execution plan. When data in a column is unevenly distributed, or “skewed,” basic statistics alone may not give the optimizer enough information to […]
MAX_DATAPUMP_JOBS_PER_PDB parameter controls the maximum number of concurrent Oracle Data Pump jobs allowed per Pluggable Database (PDB), enabling database administrators (DBAs) to better manage and govern Oracle Data Pump resource usage. Key Details Resource Utilization The primary resource Oracle Data Pump utilizes is the Shared Pool within the System Global Area (SGA) of the database. […]
Overview Oracle Database 19c introduces the capability to execute Data Manipulation Language (DML) operations directly on an Active Data Guard standby database. This feature allows applications to benefit from using Active Data Guard for standby operations that require occasional writes, seamlessly redirecting DML operations to the primary database. How DML Redirection Works: When a DML […]