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Tuesday, April 24, 2012

Top Session per User with CPU Status


select
/* if sid not found in v$session then disconnected */
decode(nvl(to_char(s.sid),-1),-1,'DISCONNECTED','CONNECTED')
"STATUS",
topsession.session_id "SESSION_ID",
u.name "NAME",
topsession.program "PROGRAM",
max(topsession.CPU) "CPU",
max(topsession.WAITING) "WAITING",
max(topsession.IO) "IO",
max(topsession.TOTAL) "TOTAL"
from (select
ash.session_id,
ash.session_serial#,
ash.user_id,
ash.program,
sum(decode(ash.session_state,'ON CPU',1,0)) "CPU",
sum(decode(ash.session_state,'WAITING',1,0)) -
sum(decode(ash.session_state,'WAITING',
decode(en.wait_class,'User I/O',1, 0 ), 0)) "WAITING" ,
sum(decode(ash.session_state,'WAITING',
decode(en.wait_class,'User I/O',1, 0 ), 0)) "IO" ,
sum(decode(session_state,'ON CPU',1,1)) "TOTAL"
from v$active_session_history ash,
v$event_name en
where en.event# = ash.event#
group by session_id,user_id,session_serial#,program
order by sum(decode(session_state,'ON CPU',1,1))) topsession,
v$session s,
user$ u
where
u.user# =topsession.user_id and
/* outer join to v$session because the session might be disconnected */
topsession.session_id = s.sid (+) and
topsession.session_serial# = s.serial# (+)
group by topsession.session_id, topsession.session_serial#, topsession.user_id,
topsession.program, s.username,s.sid,s.paddr,u.name
order by max(topsession.TOTAL) desc;

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