1. Database Reference
  2. Dynamic Performance Views
  3. Dynamic Performance (V$) Views: V$SCHEDULER_RUNNING_JOBS to V$ZONEMAP_USAGE_STATS
  4. V$WAITSTAT

9.133 V$WAITSTAT

V$WAITSTAT displays block contention statistics. This table is only updated when timed statistics are enabled.
Column Datatype Description

CLASS

VARCHAR2(18)

Class of the block

COUNT

NUMBER

Number of waits by this OPERATION for this CLASS of block

TIME

NUMBER

Sum of all wait times for all the waits by this OPERATION for this CLASS of block (in centiseconds)

CON_ID

NUMBER

The ID of the container to which the data pertains. Possible values include:

  • 0: This value is used for rows containing data that pertain to the entire CDB. This value is also used for rows in non-CDBs.

  • 1: This value is used for rows containing data that pertain to only the root

  • n: Where n is the applicable container ID for the rows containing data