Many a times we would need to know the users who are causing more redo generation. Hope the following script will help us from now onwards
col machine for a15
col username for a10
col redo_MB for 999G990 heading “Redo |Size MB”
column sid_serial for a13;
select b.inst_id,
lpad((b.SID || ‘,’ || lpad(b.serial#,5)),11) sid_serial,
b.username,
machine,
b.osuser,
b.status,
a.redo_mb
from (select n.inst_id, sid,
round(value/1024/1024) redo_mb
from gv$statname n, gv$sesstat s
where n.inst_id=s.inst_id
and n.name = ‘redo size’
and s.statistic# = n.statistic#
order by value desc
) a,
gv$session b
where b.inst_id=a.inst_id and a.sid = b.sid and rownum <= 10 and b.username is not null;
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