There are fixed views and columns that provide PGA memory use statistics. Most of
these statistics are enabled when PGA_AGGREGATE_TARGET is set.
Statistics on allocation and use of work area memory can be viewed in the
following dynamic performance views:
V$SYSSTAT
V$SESSTAT
V$PGASTAT
V$SQL_WORKAREA
V$SQL_WORKAREA_ACTIVE
The following three columns in the V$PROCESS view report the PGA memory
allocated and used by an Oracle process:
PGA_USED_MEM
PGA_ALLOCATED_MEM
PGA_MAX_MEM
these statistics are enabled when PGA_AGGREGATE_TARGET is set.
Statistics on allocation and use of work area memory can be viewed in the
following dynamic performance views:
V$SYSSTAT
V$SESSTAT
V$PGASTAT
V$SQL_WORKAREA
V$SQL_WORKAREA_ACTIVE
The following three columns in the V$PROCESS view report the PGA memory
allocated and used by an Oracle process:
PGA_USED_MEM
PGA_ALLOCATED_MEM
PGA_MAX_MEM
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