How to find db file scatered read in trace file?

Question

Hi All,
Was just going through basic concepts...
1. Created table T1with 1000 rows in LMT of 8k block size.
2. enabled tracing - alter session set events '10046 trace name context forever, level 12';
3. performed - select * from T1;
4. ALTER SYSTEM SET EVENTS '10046 trace name context off';
Now i didnt found any db file scatered read in trace, as select is opting for full table scan...whats the problem here?
I found only sql* net messages in trace file.
-Yasser

Answer 1

No luck..
SQL> select * from v$version;
BANNER
Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64bi
PL/SQL Release 10.2.0.4.0 - Production
CORE    10.2.0.4.0      Production
TNS for Solaris: Version 10.2.0.4.0 - Production
NLSRTL Version 10.2.0.4.0 - Production
SQL> create table tt1 as select * from dba_objects;
Table created.
SQL> alter system flush buffer_cache;
System altered.
SQL> ALTER SYSTEM SET EVENTS '10046 trace name context forever, level 12';
System altered.
SQL> select * from tt1;
------Excluded unwanted output---
SQL> ALTER SYSTEM SET EVENTS '10046 trace name context off';
System altered.
Now content in trace file-
/usr/local/opt/oracle/admin/mytest/udump/mytest1_ora_7053.trc
Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64bit Production
With the Partitioning, Real Application Clusters, OLAP, Data Mining
and Real Application Testing options
ORACLE_HOME = /usr/local/opt/oracle/product/10.2.0
System name:    SunOS
Node name:      xxxxxxx
Release:        5.10
Version:        Generic_125100-06
Machine:        sun4us
Instance name: mytest1
Redo thread mounted by this instance: 1
Oracle process number: 24
Unix process pid: 7053, image: oracle@xxxxxx (TNS V1-V3)
*** 2009-10-14 03:39:06.573
*** ACTION NAME:() 2009-10-14 03:39:06.572
*** MODULE NAME:(sqlplus@xxxxxx (TNS V1-V3)) 2009-10-14 03:39:06.572
*** SERVICE NAME:(SYS$USERS) 2009-10-14 03:39:06.572
*** SESSION ID:(148.71) 2009-10-14 03:39:06.572
WAIT #1: nam='SQL*Net message to client' ela= 2 driver id=1650815232 #bytes=1 p3=0 obj#=-1 tim=13972153430324
WAIT #1: nam='SQL*Net message from client' ela= 6241448 driver id=1650815232 #bytes=1 p3=0 obj#=-1 tim=13972159672267
=====================
PARSING IN CURSOR #1 len=16 dep=0 uid=0 oct=3 lid=0 tim=13972159673957 hv=2245880055 ad='c952ec28'
select * from t1
END OF STMT
PARSE #1:c=0,e=1550,p=0,cr=0,cu=0,mis=1,r=0,dep=0,og=1,tim=13972159673952
BINDS #1:
EXEC #1:c=0,e=59,p=0,cr=0,cu=0,mis=0,r=0,dep=0,og=1,tim=13972159674104
WAIT #1: nam='SQL*Net message to client' ela= 3 driver id=1650815232 #bytes=1 p3=0 obj#=-1 tim=13972159674145
FETCH #1:c=0,e=84,p=0,cr=4,cu=0,mis=0,r=1,dep=0,og=1,tim=13972159674266
WAIT #1: nam='SQL*Net message from client' ela= 224 driver id=1650815232 #bytes=1 p3=0 obj#=-1 tim=13972159674531
WAIT #1: nam='SQL*Net message to client' ela= 0 driver id=1650815232 #bytes=1 p3=0 obj#=-1 tim=13972159674557
FETCH #1:c=0,e=29,p=0,cr=1,cu=0,mis=0,r=15,dep=0,og=1,tim=13972159674580
WAIT #1: nam='SQL*Net message from client' ela= 408 driver id=1650815232 #bytes=1 p3=0 obj#=-1 tim=13972159675013
WAIT #1: nam='SQL*Net message to client' ela= 3 driver id=1650815232 #bytes=1 p3=0 obj#=-1 tim=13972159675167
FETCH #1:c=0,e=86,p=0,cr=1,cu=0,mis=0,r=15,dep=0,og=1,tim=13972159675198
WAIT #1: nam='SQL*Net message from client' ela= 427 driver id=1650815232 #bytes=1 p3=0 obj#=-1 tim=13972159675706
WAIT #1: nam='SQL*Net message to client' ela= 0 driver id=1650815232 #bytes=1 p3=0 obj#=-1 tim=13972159675732
FETCH #1:c=0,e=28,p=0,cr=1,cu=0,mis=0,r=15,dep=0,og=1,tim=13972159675754
WAIT #1: nam='SQL*Net message from client' ela= 280 driver id=1650815232 #bytes=1 p3=0 obj#=-1 tim=13972159676056
WAIT #1: nam='SQL*Net message to client' ela= 1 driver id=1650815232 #bytes=1 p3=0 obj#=-1 tim=13972159676117
FETCH #1:c=0,e=44,p=0,cr=1,cu=0,mis=0,r=15,dep=0,og=1,tim=13972159676144
.................SAME MESSAGES.....................But i did not find any scattered read event.
Seems like i am missing some thing.
-Yasser
Edited by: YasserRACDBA on Oct 15, 2009 12:00 PM
Edited Node name