V$RSRC_PDB

V$RSRC_PDB displays data related to currently active resource consumer groups by pluggable database (PDB).

When the STATISTICS_LEVEL is set to TYPICAL or ALL, this view contains information about CPU utilization and wait times even when no Resource Manager plan is set or when the Resource Manager plan does not monitor CPU or session resources.

Statistics in V$RSRC_PDB are reset when a multitenant container database (CDB) changes its resource plan. They are not impacted by PDB resource plan changes.

V$RSRC_PDB covers the same time period for all PDBs. This view is specifically designed for comparing statistics across different PDBs.

Since V$RSRC_PDB does not contain information at the consumer group level, it is not useful for comparing consumer groups inside a PDB.

Column Datatype Description
PDB_NAME VARCHAR2(32) PDB name
CPU_WAIT_TIME NUMBER Cumulative amount of time that sessions waited for CPU because of resource management. This does not include waits due to latch or enqueue contention, I/O waits, and so on. When CPU resources are not being actively managed, this value is set to zero.
CPU_WAITS NUMBER Cumulative number of times all sessions in the consumer group had to wait for CPU because of resource management. This does not include waits due to latch or enqueue contention, I/O waits, and so on. When CPU resources are not being actively managed, this value is set to zero.
CONSUMED_CPU_TIME NUMBER Cumulative amount of CPU time consumed by all sessions in the consumer group (in milliseconds)
YIELDS NUMBER Cumulative number of times that sessions in the consumer group had to yield CPU to other sessions because of quantum expiration. When CPU resources are not being actively managed, this value is set to zero.
IO_SERVICE_TIME NUMBER Cumulative I/O wait time (in milliseconds)
IO_SERVICE_WAITS NUMBER Total number of wait requests
SMALL_READ_MEGABYTES NUMBER Number of single block megabytes read
SMALL_WRITE_MEGABYTES NUMBER Number of single block megabytes written
LARGE_READ_MEGABYTES NUMBER Number of multiblock megabytes read
LARGE_WRITE_MEGABYTES NUMBER Number of multiblock megabytes written
SMALL_READ_REQUESTS NUMBER Number of single block read requests
SMALL_WRITE_REQUESTS NUMBER Number of single block write requests
LARGE_READ_REQUESTS NUMBER Number of multiblock read requests
LARGE_WRITE_REQUESTS NUMBER Number of multiblock write requests
PQS_COMPLETED NUMBER Total number of completed parallel statements in the consumer group
PQ_SERVERS_USED NUMBER Total number of parallel servers used by completed parallel statements in the consumer group
PQS_QUEUED NUMBER Number of times that sessions in the consumer group were queued when trying to run parallel statements
PQ_ACTIVE_TIME NUMBER Cumulative sum of the parallel active times for all completed parallel statements in the consumer group (in milliseconds)
PQ_QUEUED_TIME NUMBER Total amount of time that sessions in the consumer group were queued when trying to run parallel statements (in milliseconds)
PQ_QUEUE_TIME_OUTS NUMBER Number of times that parallel statements from sessions in the consumer group timed out because their queue time exceeded the Resource Manager plan’s PARALLEL_QUEUE_TIMEOUT limit
CURRENT_PQS_ACTIVE NUMBER Number of active parallel statements in the consumer group. This value does not include parallel statements that are never queued, such as GV$ queries.
CURRENT_PQ_SERVERS_ACTIVE NUMBER Number of active parallel servers in the consumer group. This value does not include servers running parallel statements that are never queued, such as GV$ queries.
CURRENT_PQS_QUEUED NUMBER Number of sessions in the consumer group that are waiting in the parallel statement queue trying to run parallel statements
SGA_BYTES NUMBER The current SGA usage by this PDB in bytes
BUFFER_CACHE_BYTES NUMBER The current usage of buffer cache by this PDB in bytes
SHARED_POOL_BYTES NUMBER The current usage of shared pool by this PDB in bytes
PGA_BYTES NUMBER The current usage of PGA by this PDB in bytes
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

See Also: “V$RSRC_CONSUMER_GROUP”