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Oracle® Database Reference
11g Release 2 (11.2)

E40402-15
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V$PROCESS_MEMORY

V$PROCESS_MEMORY displays dynamic PGA memory usage by named component categories for each process.

Column Datatype Description
PID NUMBER Oracle process identifier
SERIAL# NUMBER Oracle process serial number
CATEGORY VARCHAR2(15) Category name. Categories include "SQL", "PL/SQL", "OLAP" and "JAVA". Special categories are "Freeable" and "Other". Freeable memory has been allocated to the process by the operating system, but has not been allocated to a category. "Other" memory has been allocated to a category, but not to one of the named categories.
ALLOCATED NUMBER Bytes of PGA memory allocated by the process for the category. For the "Freeable" category, it is the amount of free PGA memory eligible to be released to the operating system.
USED NUMBER Bytes of PGA memory used by the process for the category. For "Freeable", the value is zero. For "Other", the value is NULL for performance reasons.
MAX_ALLOCATED NUMBER Maximum bytes of PGA memory ever allocated by the process for the category.