RE: Hot tables

From: Richard Huntley <rhuntley_at_mindleaders.com>
Date: Thu, 25 Jul 2002 06:48:21 -0800
Message-ID: <F001.004A232B.20020725064821@fatcity.com>

FROM METALINK:   some quick starters:

select disk_reads, sql_text
from v$sqlarea
where disk_reads > 10000
order by disk_reads desc;

select buffer_gets, sql_text
from v$sqlarea
where buffer_gets > 200000
order by buffer_gets desc;  

Also, look at the following links:

http://www.jlcomp.demon.co.uk/ 
http://www.jlcomp.demon.co.uk/sqlarea.html
<http://www.jlcomp.demon.co.uk/sqlarea.html>  
 

HTH   -----Original Message-----
Sent: Thursday, July 25, 2002 8:48 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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-- 
Author: Richard Huntley
  INET: rhuntley_at_mindleaders.com

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Received on Thu Jul 25 2002 - 09:48:21 CDT