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Oracle dba_hist_waitclassmet_history

Oracle Tips by Burleson Consulting

dba_hist_waitclassmet_history

The dba_hist_waitclassmet_history view displays the metric history for wait event classes such as application, commit, concurrency, configuration, and other.

 

SQL> desc  DBA_HIST_WAITCLASSMET_HISTORY

 

Name                                      Null?    Type

----------------------------------------- -------- ----------

SNAP_ID                                   NOT NULL NUMBER

DBID                                      NOT NULL NUMBER

INSTANCE_NUMBER                           NOT NULL NUMBER

WAIT_CLASS_ID                             NOT NULL NUMBER

WAIT_CLASS                                         VARCHAR2(64)

BEGIN_TIME                                NOT NULL DATE

END_TIME                                  NOT NULL DATE

INTSIZE                                   NOT NULL NUMBER

GROUP_ID                                  NOT NULL NUMBER

AVERAGE_WAITER_COUNT                      NOT NULL NUMBER

DBTIME_IN_WAIT                            NOT NULL NUMBER

TIME_WAITED                               NOT NULL NUMBER

WAIT_COUNT                                NOT NULL NUMBER

 

The metrics stored in this view include average waiter count, database time spent in the wait, time waited, and number of wait times.

 

 

SEE CODE DEPOT FOR FULL SCRIPTS


This is an excerpt from my latest book "Oracle Tuning: The Definitive Reference". 

You can buy it direct from the publisher for 30%-off and get instant access to the code depot of Oracle tuning scripts:

http://www.rampant-books.com/book_1002_oracle_tuning_definitive_reference_2nd_ed.htm

 


 

 

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