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Query to find Oracle Process consuming most of Memory and CPU

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Query to find Oracle Process consuming most of the Memory and CPU


Session consuming the most memory

SELECT a.username, a.osuser, a.program, b.spid,b.pga_used_mem, a.sid, a.serial# ,a.module,a.logon_time,a.terminal FROM v$session a, v$process b WHERE a.paddr = b.addr
order by
b.pga_used_mem desc


Session Consuming Most CPU

select 
   ss.username,
   se.SID,
   VALUE/100 cpu_usage_seconds
from
   v$session ss, 
   v$sesstat se, 
   v$statname sn
where
   se.STATISTIC# = sn.STATISTIC#
and
   NAME like '%CPU used by this session%'
and
   se.SID = ss.SID
and 
   ss.status='ACTIVE'
and 
   ss.username is not null
order by 3 desc

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