Oracle 视图 V$RSRCPDBMETRIC 官方解释，作用，如何使用详细说明
本站中文解释
Oracle视图V$RSRCPDBMETRIC是面向数据库资源管理器（Resource Manager）的一个视图，该视图以时间为维度呈现活动和已完成的各种数据库操作，用于评估资源占用状态和统计有关的性能指标。
使用V$RSRCPDBMETRIC视图可以帮助用户定位计算机系统中有关性能的问题，以及维护者识别资源消耗超标等情况，以便及时采取行动，进行性能调优。使用V$RSRCPDBMETRIC视图还可以实时监控数据库的性能，并将数据库资源的分配状况记录下来，从而形成长期的调优趋势。
官方英文解释
V$RSRCPDBMETRIC displays information about resources consumed and wait times per 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. Metrics are collected and stored every minute when CPU utilization is not being monitored.
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Begin time of the interval |
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End time of the interval |
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Interval size (in hundredths of a second) |
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A sequential counter that uniquely describes the |
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Cumulative amount of CPU time consumed by all sessions in the PDB, in milliseconds |
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Cumulative amount of time that sessions waited for CPU because of resource management, in milliseconds. 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. |
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Number of CPUs that the Resource Manager is utilizing. If instance caging is enabled, then this column is equal to the value of the |
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Maximum number of sessions in the PDB that can run simultaneously. The value of this column is |
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Average number of sessions in the PDB that are currently running |
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Average number of sessions in the PDB that are waiting for CPU due to resource management. When CPU resources are not being actively managed, this value is set to zero. |
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Maximum percentage of CPU that the PDB can use at any time, with respect to the total number of CPUs in the system. The value of this column is |
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Average percentage of CPU consumed by the PDB, with respect to the total number of CPUs in the system |
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I/O operations per second during the previous minute for this PDB |
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I/O megabytes per second during the previous minute for this PDB |
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Indicates how much of the I/O per second in the current PDB was exempted from throttling. For example, if the value in the I/O throttling is defined by the |
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Indicates how many megabytes of I/O executed per second in the current PDB were exempted from throttling. For example, if the value in the I/O megabytes per second throttling is defined by the |
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Average throttle time per I/O operation in milliseconds during the previous minute for this PDB |
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The average number of parallel statements that were running during the 1-minute metric window |
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The average number of parallel statements that were queued during the 1-minute metric window |
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The average number of parallel servers that were actively running as part of a parallel statement during the 1-minute metric window |
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The average number of parallel servers that were requested by queued parallel statements during the 1-minute metric window |
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The number of parallel servers allowed to be used by this PDB during the 1-minute metric window |
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The current SGA usage by this PDB in bytes |
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The current usage of the buffer cache by this PDB in bytes |
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The current usage of the shared pool by this PDB in bytes |
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The current PGA usage by this PDB in bytes |
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Resource Manager plan name |
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The ID of the container to which the data pertains. Possible values include:
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See Also:
“STATISTICS_LEVEL”
