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Oracle® Database Reference
11g Release 2 (11.2)

E40402-14
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V$RSRC_SESSION_INFO

V$RSRC_SESSION_INFO displays Resource Manager statistics per session.

Column Datatype Description
SID NUMBER Session identifier
CURRENT_CONSUMER_GROUP_ID NUMBER Object ID of the consumer group in which the session currently belongs; NULL if the session has not yet logged in
ORIG_CONSUMER_GROUP_ID NUMBER Object ID of the consumer group in which the session was placed by the consumer group mappings; NULL if the session has not yet logged in

This group may not be the current group because the SWITCH_GROUP directive in the current plan may have changed the session's current group. This group may not equal the MAPPED_CONSUMER_GROUP because the MAPPED_CONSUMER_GROUP may not be part of the current plan.

MAPPING_ATTRIBUTE VARCHAR2(32) Session attribute that was used to map the session into its original consumer group; NULL if no mapping was used

See Also: "DBA_RSRC_GROUP_MAPPINGS" for more details

MAPPED_CONSUMER_GROUP VARCHAR2(32) Consumer group to which the session was originally mapped; NULL if no mapping was used

This may not correspond to the original consumer group, because the mapped group may not be part of the current plan.

See Also: "DBA_RSRC_GROUP_MAPPINGS" for more details

STATE VARCHAR2(32) Current state of the session:
  • NOT MANAGED - Session has not logged in or the current Resource Manager plan does not require the session to be managed at this point in time

  • RUNNING - Session is currently running on the CPU

  • WAITING FOR CPU - Session is ready to run. It is waiting for a CPU quantum to run.

  • QUEUED - Session is queued because the active session limit was reached

  • IDLE - Session is idle

  • IDLE BLKR - Session is idle and blocking another session

  • WAITING - Session is currently in a wait

    See Also: "V$SESSION_WAIT" for the wait type

  • WAITING_FOR_IO - Session is waiting to submit an I/O request

  • UNBOUND - Session is not bound to any process

  • EXITING - Session is about to terminate

ACTIVE VARCHAR2(5) Indicates whether the session is currently active (TRUE) or not (FALSE). This includes when one of the following conditions is true:
  • Session is in the top call

  • Session has a transaction in progress

  • Session is using temporary space objects

  • Session holds user enqueues

CURRENT_IDLE_TIME NUMBER Number of seconds the session has been idle (in states IDLE or IDLE BLKR) while in this consumer group; NULL if the current Resource Manager plan does not require updating this statistic. This value is reset to zero when the session becomes active.
CURRENT_CPU_WAIT_TIME NUMBER Amount of time (in milliseconds) the session has waited for CPU because of resource management (in state WAIT FOR CPU) while in the current consumer group; NULL if the current Resource Manager plan does not require updating this statistic. This does not include waits due to latch or enqueue contention, I/O waits, and so on. If SWITCH_TIME_IN_CALL is used, then this will be reset at the end of every call.
CPU_WAIT_TIME NUMBER Cumulative amount of time (in milliseconds) the session has waited for CPU (in its lifetime) because of resource management. This does not include waits due to latch or enqueue contention, I/O waits, and so on.
CURRENT_CPU_WAITS NUMBER Number of times the session had to wait for CPU because of resource management while in this consumer group; NULL if the current Resource Manager plan does not require updating this statistic. This does not include waits due to latch or enqueue contention, I/O waits, and so on. If SWITCH_TIME_IN_CALL is used, then this will be reset at the end of every call.
CPU_WAITS NUMBER Cumulative number of times the session had to wait for CPU (in its lifetime) because of resource management. This does not include waits due to latch or enqueue contention, I/O waits, and so on.
CURRENT_CONSUMED_CPU_TIME NUMBER Amount of CPU time (in milliseconds) consumed by the session while in the current consumer group; NULL if the current Resource Manager plan does not require updating this statistic. If SWITCH_TIME_IN_CALL is used, then this will be reset at the end of every call.
CONSUMED_CPU_TIME NUMBER Cumulative amount of CPU time consumed by the session (in its lifetime) (in milliseconds)
CURRENT_ACTIVE_TIME NUMBER Amount of time (in milliseconds) the session has been active while in the current consumer group; NULL if the current Resource Manager plan does not require updating this statistic. Active time is time spent running and waiting while executing a call. It does not include the time a session waited for CPU resources. If SWITCH_TIME_IN_CALL is used, then this is reset at the end of every call.
ACTIVE_TIME NUMBER Cumulative amount of active time (in milliseconds) consumed by the session (in its lifetime)
CURRENT_QUEUED_TIME NUMBER Amount of time (in milliseconds) the current request from the session has been queued (in state QUEUED). If the session does not have a request currently queued up, then this number will be zero.
QUEUED_TIME NUMBER Total amount of time (in milliseconds) the session has spent in the QUEUED state (in its lifetime)
CURRENT_YIELDS NUMBER Number of times the session had to yield the CPU to other sessions (due to quantum expiration) while in the current consumer group; NULL if the current Resource Manager plan does not require updating this statistic. If SWITCH_TIME_IN_CALL is used, then this is reset at the end of every call.
YIELDS NUMBER Cumulative number of times the session had to yield CPU to other sessions due to quantum expiration (in its lifetime)
CURRENT_UNDO_CONSUMPTION NUMBER Current amount (in KB) of undo consumed by the session; NULL if the current Resource Manager plan does not have an UNDO_POOL directive
MAX_UNDO_CONSUMPTION NUMBER Maximum amount of undo consumed (in KB) during the session's lifetime. This value may not be updated because the current Resource Manager plan may not have an UNDO_POOL directive.
SQL_CANCELED NUMBER Number of times SQL queries running in the session were canceled due to exceeding the Resource Manager plan's SWITCH_TIME limit.
QUEUE_TIME_OUTS NUMBER Number of times requests from the session timed out because they queued longer than the Resource Manager plan's limit
ESTIMATED_EXECUTION_LIMIT_HIT NUMBER Number of times requests from the session were not run because the optimizer's estimated time to execute the query exceeded the MAX_EST_EXEC_TIME limit
CURRENT_IO_SERVICE_TIME NUMBER Current I/O wait time of the session (in milliseconds)
IO_SERVICE_TIME NUMBER Cumulative amount of I/O wait time by the session (in its lifetime) (in milliseconds)
CURRENT_IO_SERVICE_WAITS NUMBER Current I/O waits by session
IO_SERVICE_WAITS NUMBER Cumulative I/O waits by session (in its lifetime)
CURRENT_SMALL_READ_MEGABYTES NUMBER Number of single block megabytes read by the session
SMALL_READ_MEGABYTES NUMBER Total number of single block megabytes read by the session (in its lifetime)
CURRENT_LARGE_READ_MEGABYTES NUMBER Number of multiblock megabytes read by the session
LARGE_READ_MEGABYTES NUMBER Total number of multiblock megabytes read by the session (in its lifetime)
CURRENT_SMALL_WRITE_MEGABYTES NUMBER Number of single block megabytes written by the session
SMALL_WRITE_MEGABYTES NUMBER Total number of single block megabytes written by the session (in its lifetime)
CURRENT_LARGE_WRITE_MEGABYTES NUMBER Number of multiblock megabytes written by the session
LARGE_WRITE_MEGABYTES NUMBER Total number of multiblock megabytes written by the session (in its lifetime)
CURRENT_SMALL_READ_REQUESTS NUMBER Number of single block read requests by the session
SMALL_READ_REQUESTS NUMBER Total number of single block read requests by the session (in its lifetime)
CURRENT_SMALL_WRITE_REQUESTS NUMBER Number of single block write requests by the session
SMALL_WRITE_REQUESTS NUMBER Total number of single block write requests by the session (in its lifetime)
CURRENT_LARGE_READ_REQUESTS NUMBER Number of multiblock read requests by the session
LARGE_READ_REQUESTS NUMBER Total number of multiblock read requests by the session (in its lifetime)
CURRENT_LARGE_WRITE_REQUESTS NUMBER Number of multiblock write requests by the session
LARGE_WRITE_REQUESTS NUMBER Total number of multiblock write requests by the session (in its lifetime)
CURRENT_PQ_ACTIVE_TIMEFoot 1  NUMBER Amount of time that the current active parallel statement has been executing, not including the amount of time that the statement has been queued (in milliseconds). If the parallel statement is queued, then the value is 0.
PQ_ACTIVE_TIMEFootref 1 NUMBER Cumulative amount of time that parallel statements have been executed over the lifetime of the session (in milliseconds)
DOPFootref 1   Degree of parallelism for the active or queued parallel statement
ESTIMATED_EXECUTION_TIMEFootref 1 NUMBER Estimated execution time for the parallel statement, as estimated by the optimizer (in milliseconds). You can compare this value to CURRENT_PQ_ACTIVE_TIME to estimate how much longer the parallel statement will run.
CURRENT_PQ_QUEUED_TIMEFootref 1 NUMBER Amount of time that the current parallel statement in the session has been queued (in milliseconds). If the session does not have a queued parallel statement, then the value is 0.
PQ_QUEUED_TIMEFootref 1 NUMBER Total amount of time that the session has spent in the PQ_QUEUED state in its lifetime (in milliseconds)
PQ_QUEUEDFootref 1 NUMBER Number of times that parallel statements in the session have been queued
PQ_QUEUE_TIME_OUTSFootref 1 NUMBER Number of times that parallel statements in the session timed out because their queue time exceeded the Resource Manager plan's PARALLEL_QUEUE_TIMEOUT limit
PQ_ACTIVEFootref 1 VARCHAR2(5) Indicates whether the session is actively running a parallel statement (TRUE) or not (FALSE).
LAST_ACTIONFoot 2  VARCHAR2(48) The most recent action that was taken on this SQL operation by Resource Manager. Its value is one of the following:
  • CANCEL_SQL

  • KILL_SESSION

  • LOG_ONLY

  • SWITCH TO <CG NAME>

For the last value, <CG NAME> is the name of the consumer group that the SQL operation was switched to. If the Resource Plan has since been changed then <CG NAME> is the ID of the consumer group.

LAST_ACTION_REASONFootref 2 VARCHAR2(30) The reason for the most recent action that was taken on this SQL operation by Resource Manager. Its value is one of the following:
  • SWITCH_CPU_TIME

  • SWITCH_IO_REQS

  • SWITCH_IO_MBS

  • SWITCH_ELAPSED_TIME

  • SWITCH_IO_LOGICAL

LAST_ACTION_TIMEFootref 2 DATE The time of the most recent action that was taken on this SQL operation by Resource Manager

Footnote 1 This column is available starting with Oracle Database 11g Release 2 (11.2.0.2).

Footnote 2 This column is available starting with Oracle Database 11g Release 2 (11.2.0.4)