Oracle 视图 DBA_HIST_RSRC_CONSUMER_GROUP 官方解释，作用，如何使用详细说明

本站中文解释

Oracle视图DBA_HIST_RSRC_CONSUMER_GROUP用于报告Deferred Stats存储在AWR中与Oracle资源管理器关联的消耗者组总消耗情况。此视图显示在一段时间内（可以设定以秒为单位的时间间隔）Oracle资源管理器的消费情况，包括各个消费者组的时间和次数占比，消费者组活动等。

使用方法：

1. 创建一个显示信息的SQL语句，如：

SELECT SNAP_ID, CONSUMER_GROUP, ACTIVE_SESSIONS, DB_TIME_RATIO
FROM DBA_HIST_RSRC_CONSUMER_GROUP
WHERE BEGIN_INTERVAL_TIME SYSDATE 1
ORDER BY DB_TIME_RATIO DESC;

2. 运行上述SQL语句，来检查系统中的消费者组情况，如果发现某些消费者组的消费较多，可以进一步优化控制Oracle资源管理器的使用。

官方英文解释

DBA_HIST_RSRC_CONSUMER_GROUP displays historical information about Resource Manager consumer groups.

This view contains snapshots of V$RSRC_CONS_GROUP_HISTORY.

A sequential counter that uniquely describes the DBA_HIST_RSRC_PLAN entry to which these consumer group statistics apply. When the instance is restarted, this value is reset to zero.

Consumer group object ID (a unique number, consistent across database shutdowns and startups)

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.

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.

Cumulative amount of CPU time consumed by all sessions in the consumer group (in milliseconds)

Cumulative number of times that sessions in the consumer group had to yield CPU to other sessions because of quantum expiration

Number of times that sessions in the consumer group were queued because the consumer group reached its active session limit

Number of times that queries in the consumer group were cancelled because the consumer group reached its UNDO_POOL limit

Number of switches into the consumer group because of the Resource Manager plan s SWITCH_TIME limit

Number of switches out of the consumer group because of the Resource Manager plan s SWITCH_TIME limit

Number of switches into the consumer group because of the Resource Manager plan s SWITCH_IO_MEGABYTES limit

Number of switches out of the consumer group because of the Resource Manager plan s SWITCH_IO_MEGABYTES limit

Number of switches into the consumer group because of the Resource Manager plan s SWITCH_IO_REQS limit

Number of switches out of the consumer group because of the Resource Manager plan s SWITCH_IO_REQS limit

Number of switches into the consumer group because of the Resource Manager plan s SWITCH_IO_LOGICAL limit

Number of switches out of the consumer group because of the Resource Manager plan s SWITCH_IO_LOGICAL limit

Number of switches into the consumer group because of the Resource Manager plan s SWITCH_ELAPSED_TIME limit

Number of switches out of the consumer group because of the Resource Manager plan s SWITCH_ELAPSED_TIME limit

The number of sessions that were killed because their PGA allocation exceeded the PGA limit specified in the Resource Plan’s SESSION_PGA_LIMIT directive

Number of times that SQL queries running in the consumer group were aborted because they exceeded the Resource Manager plan s SWITCH_TIME limit and CANCEL_SQL was specified as the Resource Manager plan s SWITCH_GROUP

Number of times that sessions running in the consumer group were terminated because they exceeded the Resource Manager plan s SWITCH_TIME limit and KILL_SESSION was specified as the Resource Manager plan s SWITCH_GROUP

Number of times that sessions in the consumer group were killed because they were idle for too long (reached MAX_IDLE_TIME)

Number of times that sessions in the consumer group were killed because they were idle too long (reached MAX_IDLE_BLOCKER_TIME) and were blocking other sessions

Total amount of time that sessions in the consumer group have spent in the QUEUED state because of the active session limit (in milliseconds)

Number of times that requests from sessions in the consumer group timed out because they were queued for too long (reached QUEUEING_P1)

Number of times that sessions in the consumer group were queued when trying to run parallel statements

Total amount of time that sessions in the consumer group were queued when trying to run parallel statements (in milliseconds)

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

Total number of parallel servers used by completed parallel statements in the consumer group

Cumulative sum of the parallel active times for all completed parallel statements in the consumer group (in milliseconds)

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.

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数据库远程运维 Oracle 视图 DBA_HIST_RSRC_CONSUMER_GROUP 官方解释，作用，如何使用详细说明