How to find out exact what part of a query is being executed?

Question

hi guys,
I can use the following query to see what queries are being executed
SELECT
a.sid, a.USERNAME, a.STATUS, b.sql_text
FROM V$SESSION a INNER JOIN V$SQLAREA b
ON a.SQL_ADDRESS= b.ADDRESS; However, is it possible to get a further breakdown of the query? i.e. see what part of the explain plan is actually being done?
thanks

Answer 1

If you did an event 10046 level 8 trace of the session , you might be able to infer which operation it is in. thanks for that.
>
If all the blocks are in the db_cache there would be no waits on, say, 'db file sequential read' or 'db file scattered read'.
SQL> select * from v$system_event where event like 'db_f%';
EVENT                                    TOTAL_WAITS TOTAL_TIMEOUTS TIME_WAITED AVERAGE_WAIT TIME_WAITED_MICRO
db file sequential read                      1558389              0        5913            0          59131163
db file scattered read                       9755066              0       63353            0         633531239
db file single write                           33173              0         262            0           2619012
db file parallel read                            635              0           6            0             55006Are the above normal for a database that has just had one batch job run on it? Or is it too high and I need to increase my db_cache-size?
thanks