Thanks John. Good point. We are on 9.0.1.3 and we have turned on the
monitoring flag for our tables. But the info that I am really looking for is
the amount of selects against the tables. I just think that it would be nice to
know the top 5% of the tables that the users are selecting from (statspack
perhaps?).
Tom
-----Original Message-----
Sent: Thursday, July 25, 2002 2:39 PM
To: Multiple recipients of list ORACLE-L
Tom,
If you are on 8i, how about using an ALTER TABLE <tab> MONITORING on all user
tables - schema by schema if you prefer - and looking at DBA_TAB_MODIFICATIONS
after a predefined period. My understanding from the Guru (Steve Adams that is!)
is that this tracking is achieved in memory via unlatched activity so there is
(should) be no performance overhead for turning on this monitoring - this
structure is flushed to disk once in 3 hours apparently. 9i takes this further
by allowing Indexes to be montored too (haven't tried that yet!)
Oh-Boy! It is nice to have On-topic queries after all those looooong OT threads.
Hth,
John Kanagaraj
Oracle Applications DBA
DBSoft Inc
(W): 408-970-7002
Want to know about a carpenter who built a bridge with two sticks and three
nails? Write me for details!
** The opinions and statements above are entirely my own and not those of my
employer or clients **
-----Original Message-----
Sent: Thursday, July 25, 2002 5:48 AM
To: Multiple recipients of list ORACLE-L
How is everyone identifying hot tables? In my tool box I have the following two
scripts but I am looking for other options. How do you track frequently
accessed tables?
Script #1 - Author unknown:
select obj_name, sum(decode(action_name,'SELECT',1,0)) sel
,sum(decode(action_name,'INSERT',1,0)) inserts,
sum(decode(action_name,'UPDATE',1,0)) updates,
sum(decode(action_name,'DELETE',1,0)) deletes
from dba_audit_trail
having sum(decode(action_name,'SELECT' , 1, 'INSERT',1,
'DELETE',1,'UPDATE',1,0)) > 0
group by obj_name;
Script #2 - Dave Ensor (BMC):
set verify off
col CTYP heading 'Command Type'
col OBJ format a32 wrap heading 'Table'
col EXES format 999,990 heading 'Execs'
col GETS format 99,999,990 heading 'Buff Gets'
col ROWP format 99,999,990 heading 'Rows Proc'
select CTYP
, OBJ
, 0 - EXEM EXES
, GETS
, ROWP
from (select distinct EXEM, CTYP, OBJ, GETS, ROWP
from ( select decode (S.COMMAND_TYPE
, 2, 'Insert into '
, 3, 'Select from '
, 6, 'Update of '
, 7, 'Delete from '
, 26, 'Lock of ') CTYP
, O.OWNER || '.' || O.NAME OBJ
, sum(0 - S.EXECUTIONS) EXEM
, sum(S.BUFFER_GETS) GETS
, sum(S.ROWS_PROCESSED) ROWP
from V$SQL S
, V$OBJECT_DEPENDENCY D
, V$DB_OBJECT_CACHE O
where S.COMMAND_TYPE in (2,3,6,7,26)
and D.FROM_ADDRESS = S.ADDRESS
and D.TO_OWNER = O.OWNER
and D.TO_NAME = O.NAME
and O.TYPE = 'TABLE'
group by S.COMMAND_TYPE
, O.OWNER
, O.NAME ) )
where ROWNUM <= &1
/
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