How to monitor the resource used by the query

Question

Hi All,
I have a locking monitoring script as below, which is currently run at daytime.
We now planned to cron the script to run by 24/7. But we have concern since this is a old legacy system.
Please advise if I going to turn on the script to run by 24/7, which item I need to monitor on?(eg: temp space, rollback segments etc)
Hope to gather some statistic whether it is safe to run the script at 24/7..
Please note that the database version is 8.1.6.3.0
SELECT /*+ RULE */
ss.username||'('||ss.sid||','||ss.serial#||')' "WAITER",
ss.status, ss.osuser, pr.spid, dbo.object_name,
sw.state, sw.SECONDS_IN_WAIT/60 mins, NVL(SUBSTR(ss.program,-10),ss.program) program, NVL(SUBSTR(ss.module,-20),ss.module) module
FROM v$session ss, v$process pr, dba_objects dbo, v$session_wait sw
WHERE ss.row_wait_obj# = dbo.object_id (+) --rows in ss that no matching rows in dbo, Oracle returns NULL
AND pr.addr = ss.paddr
AND sw.sid = ss.sid
AND sw.event ='enqueue'
AND ss.lockwait IS NOT NULL
AND ss.sid IN
(SELECT sid FROM v$lock WHERE TYPE='TX' AND id1 IN
(SELECT id1 FROM v$lock WHERE sid IN
(SELECT sid FROM v$session WHERE lockwait IS NOT Null)
AND sw.seconds_in_wait > 180
ORDER BY mins DESC;
Edited by: SagiGal on 31-Jan-2013 23:05

Answer 1

you can use v$lock to identify locks directly:
select *
          FROM v$lock aa, v$lock b, v$session blocker ,v$session waiter
          WHERE aa.block = 1
          AND b.request > 0
          AND aa.id1 = b.id1
          AND aa.id2 = b.id2
          AND aa.sid = blocker.sid
          AND waiter.sid = b.sid
SagiGal wrote:Please advise if I going to turn on the script to run by 24/7, which item I need to monitor on?(eg: temp space, rollback segments etc)Nothing. you can run this query every minute! It queries the system views, which are organized by oracle continuously.