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Oracle® Database Reference
12c Release 1 (12.1)

E17615-24
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V$PROCESS

V$PROCESS displays information about the currently active processes.

Column Datatype Description
ADDR RAW(4 | 8) Address of the process state object
PID NUMBER Oracle process identifier
SOSID VARCHAR2(24) Operating system (process, thread) identifier.

This identifier is unique whether the Oracle multiprocess/multithread feature is enabled or not.

SPID VARCHAR2(24) Operating system process identifier.

The Oracle multiprocess/multithread feature is available for UNIX systems.

When the Oracle multiprocess/multithread feature is enabled, RDBMS processes are mapped to threads running in operating system processes, and the SPID identifier is not unique for RDBMS processes.

When the Oracle multiprocess/multithread feature is not enabled on UNIX systems, the SPID identifier is unique for RDBMS processes.

STID VARCHAR2(24) Operating system thread identifier.

The Oracle multiprocess/multithread feature is available for UNIX systems.

When the Oracle multiprocess/multithread feature is enabled, RDBMS processes are mapped to threads running in operating system processes, and the SPID and STID together uniquely identify an RDBMS process.

The STID is not unique on Solaris. The STID is unique on Linux and AIX.

EXECUTION_TYPE VARCHAR2(10) Operating system execution type
PNAME VARCHAR2(5) Name of this process
USERNAME VARCHAR2(15) Operating system process username
SERIAL# NUMBER Process serial number
TERMINAL VARCHAR2(30) Operating system terminal identifier
PROGRAM VARCHAR2(48) Program in progress
TRACEID VARCHAR2(255) Trace file identifier
TRACEFILE VARCHAR2(513) Trace file name of the process
BACKGROUND VARCHAR2(1) 1 for a background process; NULL for a normal process
LATCHWAIT VARCHAR2(16) Address of the latch the process is waiting for; NULL if none
LATCHSPIN VARCHAR2(16) This column is obsolete
PGA_USED_MEM NUMBER PGA memory currently used by the process (in bytes)
PGA_ALLOC_MEM NUMBER PGA memory currently allocated by the process (including free PGA memory not yet released to the operating system by the server process), in bytes
PGA_FREEABLE_MEM NUMBER Allocated PGA memory which can be freed (in bytes)
PGA_MAX_MEM NUMBER Maximum PGA memory ever allocated by the process (in bytes)
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