How to find the sessions which generated maximum redo amount at instance?

Question

I use below query or Sql*Plus's set autotrace traceonly statistics > redo size statistic to calculate how much redo I generated in my session;
CREATE OR REPLACE VIEW redo_size AS
SELECT value
FROM v$mystat, v$statname
WHERE v$mystat.statistic# = v$statname.statistic#
AND v$statname.name = ‘redo size’;
But how to find the sessions which generated maximum(top 5 for example) redo from the last database startup on 9iR2 or also with new 10gR2 historic views?
We need this information because from the produced archived log files we observe something new producing almost 2 times more redo for a week. I looked at statspack report but couldnt find as I suspected for a massive update or delete.
Best regards,
Tonguc

Answer 1

I tried v$sysstat but I didnt think about v$sesstat Mr.Gasparotto, thank you very much :)
SELECT ss.sid,
sq.sql_text,
se.status,
se.username,
se.osuser,
se.program,
se.machine,
ss.VALUE
FROM v$sesstat ss, v$statname sn, v$session se, v$sqlarea sq
WHERE ss.statistic# = sn.statistic#
AND se.sql_hash_value = sq.hash_value(+)
AND se.sql_address = sq.address(+)
AND ss.sid = se.sid
AND sn.NAME = 'redo size'
ORDER BY ss.VALUE DESC
Best regards.