v$session.status 和 v$process.backup 了解

v$session.status 

STATUS

VARCHAR2(8)

Status of the session: ACTIVE - Session currently executing SQL-----表示当前回话正在执行sql INACTIVE KILLED - Session marked to be killed CACHED - Session temporarily cached for use by Oracle*XA SNIPED - Session inactive, waiting on the client

v$process.background

BACKGROUND

VARCHAR2(1)

1 for a background process; NULL for a normal process

1 -->oracle 的后台进程

null --》 客户端server 进程 ，及一些salve 进程（S000，D000，J000，P000）

P000 -->parallel query slaves

D000 -->dispatchers

S000 --> shared servers 

J000 -->job queue slave processes