View in which all sql scripts are stored

Question

Hello Guys,
I am a Oracle DBA (Fresher in the field). I want to know in which view or table all the sql queries are stored as i have a performance tuning problem. I want to know which sql scripts are afffecting the most time to execute which in turn affecting the overall performance of the database. I am working on oracle 10g.

Answer 1

You should also look at V$SQL_PLAN table for example:
rem fts report
rem based on V$SQL_PLAN table
col operation format a13
col object_name format a32
col object_owner format a10
col options format a15
col executions format 999,999,999
column dt new_value today noprint
select to_char(sysdate,'ddmonyyyyhh24miss') dt from dual;
set pages 55 lines 132 trims on
ttitle 'Full Table/Index Scans'
spool fts&&today
select
a.hash_value,a.object_owner,a.object_name, rtrim(a.operation) operation,
a.options, sum(b.executions) executions, c.bytes, (sum(b.executions)*c.bytes)/(1024*1024) fts_meg
from
v$sql_Plan a, v$sqlarea b, dba_segments c
where
(a.object_owner=c.owner
and a.object_name=c.segment_name)
and a.address=b.address
and a.operation IN ('TABLE ACCESS','INDEX')
and nvl(a.options,'NULL') in ('FULL','NULL','FULL SCAN')
and a.object_owner not in ('SYS','SYSTEM','PERFSTAT','SYSMAN','WKSYS','DBSNMP')
and b.executions>1
group by a.hash_value,a.object_owner, a.object_name, operation, options, c.bytes
order by a.object_owner,a.object_name,operation, options, executions desc
spool off
set pages 20
ttitle off
It will show you for active SQL what the plans are and some other important stats.
Mike