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Oracle9i Database Reference
Release 2 (9.2)

Part Number A96536-02
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V$PROCESS

This view contains information about the currently active processes. While the LATCHWAIT column indicates what latch a process is waiting for, the LATCHSPIN column indicates what latch a process is spinning on. On multi-processor machines, Oracle processes will spin on a latch before waiting on it.

Column Datatype Description

ADDR

RAW(4 | 8)

Address of process state object

PID

NUMBER

Oracle process identifier

SPID

VARCHAR2(12)

Operating system process identifier

USERNAME

VARCHAR2(15)

Operating system process username. Any two-task user coming across the network has "-T" appended to the 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

BACKGROUND

VARCHAR2(1)

1 for a background process; NULL for a normal process

LATCHWAIT

VARCHAR2(8)

Address of latch the process is waiting for; NULL if none

LATCHSPIN

VARCHAR2(8)

Address of the latch the process is spinning on; NULL if none

PGA_USED_MEM

NUMBER

PGA memory currently used by the process

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)

PGA_FREEABLE_MEM

NUMBER

Allocated PGA memory which can be freed

PGA_MAX_MEM

NUMBER

Maximum PGA memory ever allocated by the process