一、视图包含当前系统oracle运行的所有进程信息。常用于将session与进程（oracle进程，操作系统进程）之间建立联系。
| Column | Datatype | Description |
| ADDR | RAW(4 | 8) | 进程对象地址 |
| PID | NUMBER | oracle进程ID |
| SPID | VARCHAR2(12) | 操作系统进程ID |
| 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) | 操作系统terminal identifier(e.g., computer name) |
| PROGRAM | VARCHAR2(48) | 进程正在执行的程序(e.g., ORACLE.EXE (ARC0)) |
| TRACEID | VARCHAR2(255) | Trace file identifier |
| BACKGROUND | VARCHAR2(1) | 1代表oracle background process，null代表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 | 当前进程所使用的PGA内存 |
| PGA_ALLOC_MEM | NUMBER | 当前分配的PGA内存大小 (including free PGA memory not yet released to the operating system by the server process) |
| PGA_FREEABLE_MEM | NUMBER | 空闲PGA |
| PGA_MAX_MEM | NUMBER | Maximum PGA memory ever allocated by the process |
示例：
1 --Eygle大师写了一段sql脚本getsql.sql，用来获取指定pid正在执行的sql语句 2 --REM getsql.sql 3 --REM author eygle 4 --REM 在windows上,已知进程ID,得到当前正在执行的语句 5 --REM 在windows上,进程ID为16进制,需要转换,在UNIX直接为10进制 6 7 SELECT /*+ ORDERED */ 8 sql_text 9 FROM v$sqltext a 10 WHERE (a.hash_value, a.address) IN ( 11 12 SELECT DECODE (sql_hash_value,0,prev_hash_value,sql_hash_value), 13 DECODE (sql_hash_value, 0, prev_sql_addr, sql_address) 14 FROM v$session b 15 WHERE b.paddr = (SELECT addr 16 FROM v$process c 17 WHERE c.spid = TO_NUMBER ('&pid', 'xxxx')) 18 ) 19 ORDER BY piece ASC 20 /