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Oracle table object wait statistics

Oracle Database Tips by Donald Burleson

You can query the v$segment_statistics view to get individual waits on specific tables in Oracle 10g.

col "Object" format a20
set numwidth 12
set lines 132
set pages 50
@title132 'Object Wait Statistics'
spool rep_out\&&db\obj_stat_xtab
select * from(
select DECODE(GROUPING(a.object_name), 1, 'All Objects', a.object_name) AS "Object",
   sum(case when a.statistic_name = 'ITL Waits' then a.value else null end) "ITL Waits",
   sum(case when a.statistic_name = 'buffer busy waits' then a.value else null end) "Buffer Busy Waits",
   sum(case when a.statistic_name = 'row lock waits' then a.value else null end) "Row Lock Waits",
   sum(case when a.statistic_name = 'physical reads' then a.value else null end) "Physical Reads",
   sum(case when a.statistic_name = 'logical reads' then a.value else null end) "Logical Reads"
   v$segment_statistics a
   a.owner like upper('&owner')
group by rollup(a.object_name)) b
where (b."ITL Waits">0 or b."Buffer Busy Waits">0);

 SEE CODE Depot for more oracle table wait statistics scripts

This script interrogates the v$segment_statistics view and shows table-level  ITL waits, buffer busy waits, row lock waits, as well as physical reads for each table.


Date: 11/19/05                                                                        Page:   1 
Time: 11:31 AM                             Object Wait Statistics                        SYSTEM 
                                               TEST database                                     
Object                  ITL Waits Buffer Busy Waits Row Lock Waits Physical Reads Logical Reads                                    
-------------------- ------------ ----------------- -------------- -------------- -------------                                    
TEST_TDL                        5             20193              0        4075292      23484160                                    
DUAL                                              1              0             28           448                                    
I_PROCEDURE1                                      1              0              3  
TDL_N02_GLOBAL                  2              5219              0          24284        134112                                    
All Objects                     7             25414              1        5468217      47396384                                    



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