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Oracle partitioned table

What is Oracle Partitioned Table? Partitioning divides a table, index, or index-organized table into smaller components. Each component is called a partition (or subpartition for composite partitioned objects). Every partition has a unique name, and may optionally have individual storage characteristics: examples include compression, or being stored in different tablespaces. A well-designed partitioning strategy can …

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ORA-00054: resource busy and acquire with NOWAIT specified

ORA-00054: resource busy and acquire with NOWAIT specified is a common error seen in Oracle Database Reference: Oracle documentation This generally happens when you try to execute a DDL on the table which is locked by transaction .It also happens if  select for update statement is executed with NOWAIT option Example SQL> alter table emp add …

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What is DB time ,DB cpu Average Active sessions, Active session in oracle

In this section we will be defining the terms like Database time(DB time in oracle ), Active session ,elapsed time and Average active session DB Time Database Time, or DB Time, is defined by Oracle as the total time by foreground sessions executing database calls. This includes CPU time, IO time, and non-idle wait time.  …

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