Oracle 视图 V$STANDBY_EVENT_HISTOGRAM 官方解释,作用,如何使用详细说明

本站中文解释

Oracle视图V$STANDBY_EVENT_HISTOGRAM用于报告用于报告Data Guard差异重定向报警事件前10秒和比例基线之间的相关时间差异。该视图可以报告RMAN重定向报警信息,允许客户确定当前延迟,识别任何潜在的机器逐渐延迟,并诊断持续的网络速度问题。

使用V$STANDBY_EVENT_HISTOGRAM视图,用户可以筛选出报警信息,以获得最有用的信息。用户可以使用视图的EVENT_WAIT_TIME字段来获得相关的Latency统计信息,以诊断每个报警信息的时间长度。单击EVENT 字段来查看每个报警的详细信息。如果用户发现报警延迟时间超过10秒,可以调查该延迟是由于网络速度低下,还是由于节点负载太高造成的。用户还可以使用V$STANDBY_EVENT_HISTOGRAM视图当作一个性能报告,以检测Data Guard环境中的任何可能存在的延迟问题,以确保实时数据只有在可接受水平上实现完全的一致性。

官方英文解释

V$STANDBY_EVENT_HISTOGRAM displays the histogram of apply lag on the physical standby. Each distinct value of apply lag has its own bucket and the count in the corresponding bucket represents the number of occurrences so far. The physical standby samples the apply lag every second and increments the corresponding bucket in the histogram.
Column Datatype Description

NAME

VARCHAR2(64)

Name of the event (currently APPLY LAG is the only valid value)

TIME

NUMBER

Time duration that the bucket represents

UNIT

VARCHAR2(16)

Time unit (seconds, minutes, hours, or days)

COUNT

NUMBER

Each row is a histogram bucket for apply lag. COUNT is the number of occurrences the apply lag falls into the histogram bucket.

LAST_TIME_UPDATED

VARCHAR2(20)

Last time the bucket was updated by an event falling into that time duration

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


数据运维技术 » Oracle 视图 V$STANDBY_EVENT_HISTOGRAM 官方解释,作用,如何使用详细说明