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Oracle® Database Reference
11g Release 2 (11.2)

E40402-14
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DBA_HIST_SQL_WORKAREA_HSTGRM

DBA_HIST_SQL_WORKAREA_HSTGRM displays the historical cumulative work area execution statistics (cumulated since instance startup) for different work area groups. This view contains snapshots of V$SQL_WORKAREA_HISTOGRAM.

Column Datatype NULL Description
SNAP_ID NUMBER NOT NULL Unique snapshot ID
DBID NUMBER NOT NULL Database ID for the snapshot
INSTANCE_NUMBER NUMBER NOT NULL Instance number for the snapshot
LOW_OPTIMAL_SIZE NUMBER NOT NULL Lower bound for the optimal memory requirement of work areas included in the row (in bytes)
HIGH_OPTIMAL_SIZE NUMBER NOT NULL Upper bound for the optimal memory requirement of work areas included in the row (in bytes)
OPTIMAL_EXECUTIONS NUMBER   Number of work areas with an optimal memory requirement comprised between LOW_OPTIMAL_SIZE and HIGH_OPTIMAL_SIZE which have been executed in optimal mode since instance startup
ONEPASS_EXECUTIONS NUMBER   Number of work areas with an optimal memory requirement comprised between LOW_OPTIMAL_SIZE and HIGH_OPTIMAL_SIZE which have been executed in one-pass mode since instance startup
MULTIPASSES_EXECUTIONS NUMBER   Number of work areas with an optimal memory requirement comprised between LOW_OPTIMAL_SIZE and HIGH_OPTIMAL_SIZE which have been executed in multi-pass mode since instance startup
TOTAL_EXECUTIONS NUMBER   Sum of OPTIMAL_EXECUTIONS, ONEPASS_EXECUTIONS, and MULTIPASSES_EXECUTIONS