Oracle管理专题之：用于监控Session、process、Lock的几个SQL语句

--查询当前会话和相关进程信息的SQL语句
select s.saddr,
s.sid,
s.serial#,
s.paddr,
s.username,
s.status,
s.osuser,
s.process,
s.machine,
s.program,
s.type,
s.action,
s.logon_time,
p.pga_used_mem,
p.pga_alloc_mem
from v$session s, v$process p
where s.PADDR = p.ADDR
order by sid

--查询当前会话等待情况及对应进程信息的SQL语句
select s.SID,
s.SERIAL#,
s.PADDR,
s.PROGRAM,
s.ACTION,
s.TYPE,
s.MACHINE,
s.SCHEMANAME,
s.USERNAME,

s.STATUS,
w.SEQ#,
w.EVENT,
w.SECONDS_IN_WAIT,
w.STATE
from v$session s, v$session_wait w
where s.sid = w.sid
order by s.sid

--查看SQL语句执行效率的语句
select sql_text,
executions,
fetches,
parse_calls,
disk_reads,
buffer_gets,
optimizer_mode,
cpu_time,
elapsed_time
from v$sql
order by cpu_time desc, executions desc