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SQL trace, 10046, trcsess and tkprof in Oracle 10g
SQL trace, 10046, trcsess and tkprof in Oracle 10g
The quickest way to capture the SQL is being processed by a session is to switch on SQL trace or set the 10046 event for a representative period of time. The resulting trace files can be read in their raw state or translated using the tkprof utility. Explaining the contents of the trace file is beyond the scope of this article, but the following sections explain how trace files can be created and processed.
Generating SQL trace files
There are numerous ways to enable, disable and vary the contents of this trace. The following methods have been available for several versions of the database.
-- All versions. SQL> ALTER SESSION SET sql_trace=TRUE; SQL> ALTER SESSION SET sql_trace=FALSE; SQL> EXEC DBMS_SESSION.set_sql_trace(sql_trace => TRUE); SQL> EXEC DBMS_SESSION.set_sql_trace(sql_trace => FALSE); SQL> ALTER SESSION SET EVENTS '10046 trace name context forever, level 8'; SQL> ALTER SESSION SET EVENTS '10046 trace name context off'; SQL> EXEC DBMS_SYSTEM.set_sql_trace_in_session(sid=>123, serial#=>1234, sql_trace=>TRUE); SQL> EXEC DBMS_SYSTEM.set_sql_trace_in_session(sid=>123, serial#=>1234, sql_trace=>FALSE); SQL> EXEC DBMS_SYSTEM.set_ev(si=>123, se=>1234, ev=>10046, le=>8, nm=>' '); SQL> EXEC DBMS_SYSTEM.set_ev(si=>123, se=>1234, ev=>10046, le=>0, nm=>' '); -- Available from SQL*Plus since 8i (commandline utility prior to this. SQL> CONN sys/password AS SYSDBA; -- User must have SYSDBA. SQL> ORADEBUG SETMYPID; -- Debug current session. SQL> ORADEBUG SETOSPID 1234; -- Debug session with the specified OS process. SQL> ORADEBUG SETORAPID 123456; -- Debug session with the specified Oracle process ID. SQL> ORADEBUG EVENT 10046 TRACE NAME CONTEXT FOREVER, LEVEL 12; SQL> ORADEBUG TRACEFILE_NAME; -- Display the current trace file. SQL> ORADEBUG EVENT 10046 TRACE NAME CONTEXT OFF; -- All versions, requires DBMS_SUPPORT package to be loaded. SQL> EXEC DBMS_SUPPORT.start_trace(waits=>TRUE, binds=>FALSE); SQL> EXEC DBMS_SUPPORT.stop_trace; SQL> EXEC DBMS_SUPPORT.start_trace_in_session(sid=>123, serial=>1234, waits=>TRUE, binds=>FALSE); SQL> EXEC DBMS_SUPPORT.stop_trace_in_session(sid=>123, serial=>1234);
The DBMS_SUPPORT
package is not present by default, but can
be loaded as the SYS user by executing the
@$ORACLE_HOME/rdbms/admin/dbmssupp.sql script.
For methods that require tracing levels the following are valid values:
- 0 - No trace. Like switching sql_trace off.
- 2 - The equivalent of regular sql_trace.
- 4 - The same as 2, but with the addition of bind variable values.
- 8 - The same as 2, but with the addition of wait events.
- 12 - The same as 2, but with both bind variable values and wait events.
The same combinations are possible for those methods with boolean parameters for waits
and binds
.
With the advent of Oracle 10g the SQL tracing options have been centralized and extended using the DBMS_MONITOR
package. The examples below show
just a few possible variations for enabling and disabling SQL trace in Oracle 10g.
-- Oracle 10g SQL> EXEC DBMS_MONITOR.session_trace_enable; SQL> EXEC DBMS_MONITOR.session_trace_enable(waits=>TRUE, binds=>FALSE); SQL> EXEC DBMS_MONITOR.session_trace_disable; SQL> EXEC DBMS_MONITOR.session_trace_enable(session_id=>1234, serial_num=>1234); SQL> EXEC DBMS_MONITOR.session_trace_enable(session_id =>1234, serial_num=>1234, waits=>TRUE, binds=>FALSE); SQL> EXEC DBMS_MONITOR.session_trace_disable(session_id=>1234, serial_num=>1234); SQL> EXEC DBMS_MONITOR.client_id_trace_enable(client_id=>'tim_hall'); SQL> EXEC DBMS_MONITOR.client_id_trace_enable(client_id=>'tim_hall', waits=>TRUE, binds=>FALSE); SQL> EXEC DBMS_MONITOR.client_id_trace_disable(client_id=>'tim_hall'); SQL> EXEC DBMS_MONITOR.serv_mod_act_trace_enable(service_name=>'db10g', module_name=>'test_api', action_name=>'running'); SQL> EXEC DBMS_MONITOR.serv_mod_act_trace_enable(service_name=>'db10g', module_name=>'test_api', action_name=>'running', - > waits=>TRUE, binds=>FALSE); SQL> EXEC DBMS_MONITOR.serv_mod_act_trace_disable(service_name=>'db10g', module_name=>'test_api', action_name=>'running');
The package provides the conventional session level tracing along with
two new variations. First, tracing can be enabled on multiple sessions
based on the
value of the client_identifier column of the V$SESSION
view, set using the DBMS_SESSION
package. Second, trace can be activated for multiple sessions based
on various combinations of the service_name, module, action columns in the V$SESSION
view, set using the DBMS_APPLICATION_INFO
package, along
with the instance_name in RAC environments. With all the possible
permutations and default values this provides a high degree of
flexibility.
trcsess
Activating trace on multiple sessions means that trace information is
spread throughout many trace files. For this reason Oracle 10g
introduced the
trcsess
utility, which allows trace information from multiple trace files to be identified and consolidated into a single trace file.
The trcsess
usage is listed below.
trcsess [output=<output file name >] [session=<session ID>] [clientid=<clientid>]
[service=<service name>] [action=<action name>] [module=<module name>] <trace file names>
output=<output file name> output destination default being standard output.
session=<session Id> session to be traced.
Session id is a combination of session Index & session serial number e.g. 8.13.
clientid=<clientid> clientid to be traced.
service=<service name> service to be traced.
action=<action name> action to be traced.
module=<module name> module to be traced.
<trace_file_names> Space separated list of trace files with wild card '*' supported.
With all these options the consolidated trace file can be as broad or as specific as needed.
tkprof
The SQL trace files produced by the methods discussed previously can be read in their raw form, or they can be translated by the tkprof utility into a more human readable form. The output below lists the usage notes from the tkprof utility in Oracle 10g.
$ tkprof
Usage: tkprof tracefile outputfile [explain= ] [table= ]
[print= ] [insert= ] [sys= ] [sort= ]
table=schema.tablename Use 'schema.tablename' with 'explain=' option.
explain=user/password Connect to ORACLE and issue EXPLAIN PLAN.
print=integer List only the first 'integer' SQL statements.
aggregate=yes|no
insert=filename List SQL statements and data inside INSERT statements.
sys=no TKPROF does not list SQL statements run as user SYS.
record=filename Record non-recursive statements found in the trace file.
waits=yes|no Record summary for any wait events found in the trace file.
sort=option Set of zero or more of the following sort options:
prscnt number of times parse was called
prscpu cpu time parsing
prsela elapsed time parsing
prsdsk number of disk reads during parse
prsqry number of buffers for consistent read during parse
prscu number of buffers for current read during parse
prsmis number of misses in library cache during parse
execnt number of execute was called
execpu cpu time spent executing
exeela elapsed time executing
exedsk number of disk reads during execute
exeqry number of buffers for consistent read during execute
execu number of buffers for current read during execute
exerow number of rows processed during execute
exemis number of library cache misses during execute
fchcnt number of times fetch was called
fchcpu cpu time spent fetching
fchela elapsed time fetching
fchdsk number of disk reads during fetch
fchqry number of buffers for consistent read during fetch
fchcu number of buffers for current read during fetch
fchrow number of rows fetched
userid userid of user that parsed the cursor
$
The waits parameter was only added in Oracle 9i, so prior to this
version wait information had to be read from the raw trace file. The
values of bind
variables must be read from the raw files as they are not displayed in
the tkprof output.
The following section shows an example of gathering SQL trace for a session to give you an idea of the whole process.
Trace Example
The sql_trace_test.sql script creates a test table and a procedure that
populates it. This procedure will be the subject of our example trace.
sql_trace_test.sql
CREATE TABLE sql_trace_test (
id NUMBER,
description VARCHAR2(50)
);
EXEC DBMS_STATS.gather_table_stats('test', 'sql_trace_test');
CREATE OR REPLACE PROCEDURE populate_sql_trace_test (p_loops IN NUMBER) AS
l_number NUMBER;
BEGIN
FOR i IN 1 .. p_loops LOOP
INSERT INTO sql_trace_test (id, description)
VALUES (i, 'Description for ' || i);
END LOOP;
SELECT COUNT(*)
INTO l_number
FROM sql_trace_test;
COMMIT;
DBMS_OUTPUT.put_line(l_number || ' rows inserted.');
END;
/
SHOW ERRORS
Gathering the statistics on the empty table may seem odd, but this
prevents any dynamic sampling being added to the trace file contents,
which would only serve to
complicate the file.
Before we start to trace the procedure we should identify the trace file
that will be produced. The name of the trace file is based on the
current value of the
user_dump_dest, the session's process id and the instance name. The
identify_trace_file.sql script combines these values to produce the
expected trace file name.
identify_trace_file.sql
SET LINESIZE 100
COLUMN trace_file FORMAT A60
SELECT s.sid,
s.serial#,
pa.value || '/' || LOWER(SYS_CONTEXT('userenv','instance_name')) ||
'_ora_' || p.spid || '.trc' AS trace_file
FROM v$session s,
v$process p,
v$parameter pa
WHERE pa.name = 'user_dump_dest'
AND s.paddr = p.addr
AND s.audsid = SYS_CONTEXT('USERENV', 'SESSIONID');
If you are using a windows environment you will need to alter the "/" to a "" in the concatenated string. The expected output from this script is displayed below.
SQL> @identify_trace_file.sql
SID SERIAL# TRACE_FILE
---------- ---------- ------------------------------------------------------------
130 26739 /u01/app/oracle/admin/DEV/udump/dev1_ora_367660.trc
1 row selected.
SQL>
Now we know the name of the trace file we can enable tracing, execute the procedure and disable tracing.
SQL> ALTER SESSION SET EVENTS '10046 trace name context forever, level 8'; Session altered. SQL> SET SERVEROUTPUT ON SQL> EXEC populate_sql_trace_test(p_loops => 5); 5 rows inserted. PL/SQL procedure successfully completed. SQL> ALTER SESSION SET EVENTS '10046 trace name context off'; Session altered. SQL>
The contents of the file are listed below. The output looks a little confusing, but you can identify the individual statements and their associated waits and statistics.
/u01/app/oracle/admin/DEV/udump/dev1_ora_367660.trc Oracle Database 10g Enterprise Edition Release 10.1.0.3.0 - Production With the Partitioning, Oracle Label Security, OLAP and Data Mining options ORACLE_HOME = /u01/app/oracle/product/10.1.0/db_1 System name: OSF1 Node name: dbserver.oracle-base.com Release: V5.1 Version: 2650 Machine: alpha Instance name: DEV1 Redo thread mounted by this instance: 1 Oracle process number: 16 Unix process pid: 367660, image: oracleDEV1@dbserver.oracle-base.com *** 2005-04-05 09:46:51.499 *** ACTION NAME:() 2005-04-05 09:46:51.499 *** MODULE NAME:(SQL*Plus) 2005-04-05 09:46:51.499 *** SERVICE NAME:(SYS$USERS) 2005-04-05 09:46:51.499 *** SESSION ID:(130.26739) 2005-04-05 09:46:51.499 ===================== PARSING IN CURSOR #29 len=68 dep=0 uid=180 oct=42 lid=180 tim=11746409761792 hv=3847243385 ad='2bb57798' ALTER SESSION SET EVENTS '10046 trace name context forever, level 8' END OF STMT EXEC #29:c=0,e=1024,p=0,cr=0,cu=0,mis=0,r=0,dep=0,og=1,tim=11746409761792 WAIT #29: nam='SQL*Net message to client' ela= 0 p1=1413697536 p2=1 p3=0 WAIT #29: nam='SQL*Net message from client' ela= 7358464 p1=1413697536 p2=1 p3=0 ===================== PARSING IN CURSOR #4 len=36 dep=0 uid=180 oct=47 lid=180 tim=11746417122304 hv=3425213768 ad='2c631cd8' BEGIN DBMS_OUTPUT.ENABLE(2000); END; END OF STMT PARSE #4:c=0,e=1024,p=0,cr=0,cu=0,mis=0,r=0,dep=0,og=1,tim=11746417122304 EXEC #4:c=0,e=0,p=0,cr=0,cu=0,mis=0,r=1,dep=0,og=1,tim=11746417122304 WAIT #4: nam='SQL*Net message to client' ela= 0 p1=1413697536 p2=1 p3=0 WAIT #4: nam='SQL*Net message from client' ela= 6924288 p1=1413697536 p2=1 p3=0 ===================== PARSING IN CURSOR #18 len=51 dep=0 uid=180 oct=47 lid=180 tim=11746424051712 hv=2083693016 ad='27ecb338' BEGIN populate_sql_trace_test(p_loops => 5); END; END OF STMT PARSE #18:c=0,e=3072,p=0,cr=0,cu=0,mis=1,r=0,dep=0,og=1,tim=11746424051712 ===================== PARSING IN CURSOR #19 len=86 dep=1 uid=180 oct=2 lid=180 tim=11746424052736 hv=3247833140 ad='28fa57f8' INSERT INTO SQL_TRACE_TEST (ID, DESCRIPTION) VALUES (:B1 , 'Description for ' || :B1 ) END OF STMT PARSE #19:c=0,e=1024,p=0,cr=0,cu=0,mis=1,r=0,dep=1,og=1,tim=11746424052736 ===================== PARSING IN CURSOR #23 len=69 dep=2 uid=0 oct=3 lid=0 tim=11746424053760 hv=1471956217 ad='2e7591f0' select con#,obj#,rcon#,enabled,nvl(defer,0) from cdef$ where robj#=:1 END OF STMT PARSE #23:c=0,e=1024,p=0,cr=0,cu=0,mis=1,r=0,dep=2,og=4,tim=11746424053760 EXEC #23:c=0,e=5120,p=0,cr=0,cu=0,mis=1,r=0,dep=2,og=4,tim=11746424059904 FETCH #23:c=0,e=0,p=0,cr=2,cu=0,mis=0,r=0,dep=2,og=4,tim=11746424059904 ===================== PARSING IN CURSOR #25 len=146 dep=2 uid=0 oct=3 lid=0 tim=11746424065024 hv=2107929772 ad='2e7b4b08' select con#,type#,condlength,intcols,robj#,rcon#,match#,refact,nvl(enabled,0),rowid,cols,nvl(defer,0) ,mtime,nvl(spare1,0) from cdef$ where obj#=:1 END OF STMT PARSE #25:c=0,e=5120,p=0,cr=0,cu=0,mis=1,r=0,dep=2,og=4,tim=11746424065024 ===================== PARSING IN CURSOR #27 len=210 dep=3 uid=0 oct=3 lid=0 tim=11746424102912 hv=864012087 ad='2e351f08' select /*+ rule */ bucket_cnt, row_cnt, cache_cnt, null_cnt, timestamp#, sample_size, minimum, maximum, distcnt, lowval, hival, density, col#, spare1, spare2, avgcln from hist_head$ where obj#=:1 and intcol#=:2 END OF STMT PARSE #27:c=50000,e=36864,p=0,cr=0,cu=0,mis=1,r=0,dep=3,og=3,tim=11746424102912 EXEC #27:c=16667,e=4096,p=0,cr=0,cu=0,mis=1,r=0,dep=3,og=3,tim=11746424108032 FETCH #27:c=0,e=1024,p=0,cr=3,cu=0,mis=0,r=1,dep=3,og=3,tim=11746424109056 EXEC #27:c=0,e=0,p=0,cr=0,cu=0,mis=0,r=0,dep=3,og=3,tim=11746424109056 FETCH #27:c=0,e=0,p=0,cr=3,cu=0,mis=0,r=1,dep=3,og=3,tim=11746424109056 EXEC #27:c=0,e=0,p=0,cr=0,cu=0,mis=0,r=0,dep=3,og=3,tim=11746424110080 FETCH #27:c=0,e=0,p=0,cr=3,cu=0,mis=0,r=1,dep=3,og=3,tim=11746424110080 ===================== PARSING IN CURSOR #28 len=121 dep=3 uid=0 oct=3 lid=0 tim=11746424119296 hv=3150898423 ad='2e347db8' select /*+ rule */ bucket, endpoint, col#, epvalue from histgrm$ where obj#=:1 and intcol#=:2 and row#=:3 order by bucket END OF STMT PARSE #28:c=0,e=9216,p=0,cr=0,cu=0,mis=1,r=0,dep=3,og=3,tim=11746424119296 EXEC #28:c=0,e=1024,p=0,cr=0,cu=0,mis=1,r=0,dep=3,og=3,tim=11746424121344 FETCH #28:c=0,e=1024,p=0,cr=3,cu=0,mis=0,r=3,dep=3,og=3,tim=11746424122368 EXEC #27:c=0,e=0,p=0,cr=0,cu=0,mis=0,r=0,dep=3,og=3,tim=11746424122368 FETCH #27:c=0,e=0,p=0,cr=3,cu=0,mis=0,r=1,dep=3,og=3,tim=11746424122368 EXEC #27:c=0,e=0,p=0,cr=0,cu=0,mis=0,r=0,dep=3,og=3,tim=11746424123392 FETCH #27:c=0,e=0,p=0,cr=3,cu=0,mis=0,r=1,dep=3,og=3,tim=11746424123392 EXEC #25:c=83334,e=61440,p=0,cr=18,cu=0,mis=1,r=0,dep=2,og=4,tim=11746424126464 FETCH #25:c=0,e=0,p=0,cr=2,cu=0,mis=0,r=0,dep=2,og=4,tim=11746424126464 ===================== PARSING IN CURSOR #12 len=169 dep=2 uid=0 oct=3 lid=0 tim=11746424128512 hv=1173719687 ad='2e7c2c50' select col#, grantee#, privilege#,max(mod(nvl(option$,0),2)) from objauth$ where obj#=:1 and col# is not null group by privilege#, col#, grantee# order by col#, grantee# END OF STMT PARSE #12:c=0,e=1024,p=0,cr=0,cu=0,mis=1,r=0,dep=2,og=4,tim=11746424128512 EXEC #12:c=0,e=3072,p=0,cr=0,cu=0,mis=1,r=0,dep=2,og=4,tim=11746424131584 FETCH #12:c=0,e=0,p=0,cr=2,cu=0,mis=0,r=0,dep=2,og=4,tim=11746424131584 ===================== PARSING IN CURSOR #26 len=151 dep=2 uid=0 oct=3 lid=0 tim=11746424131584 hv=4139184264 ad='2e7cc608' select grantee#,privilege#,nvl(col#,0),max(mod(nvl(option$,0),2))from objauth$ where obj#=:1 group by grantee#, privilege#,nvl(col#,0) order by grantee# END OF STMT PARSE #26:c=0,e=0,p=0,cr=0,cu=0,mis=0,r=0,dep=2,og=4,tim=11746424131584 EXEC #26:c=0,e=0,p=0,cr=0,cu=0,mis=0,r=0,dep=2,og=4,tim=11746424131584 FETCH #26:c=0,e=1024,p=0,cr=2,cu=0,mis=0,r=0,dep=2,og=4,tim=11746424132608 ===================== PARSING IN CURSOR #7 len=175 dep=2 uid=0 oct=3 lid=0 tim=11746424132608 hv=1729330152 ad='2f3597a8' select u.name,o.name, t.update$, t.insert$, t.delete$, t.enabled from obj$ o,user$ u,trigger$ t where t.baseobject=:1 and t.obj#=o.obj# and o.owner#=u.user# order by o.obj# END OF STMT PARSE #7:c=0,e=0,p=0,cr=0,cu=0,mis=0,r=0,dep=2,og=4,tim=11746424132608 EXEC #7:c=0,e=0,p=0,cr=0,cu=0,mis=0,r=0,dep=2,og=4,tim=11746424132608 FETCH #7:c=0,e=0,p=0,cr=2,cu=0,mis=0,r=0,dep=2,og=4,tim=11746424132608 STAT #7 id=1 cnt=0 pid=0 pos=1 obj=0 op='SORT ORDER BY (cr=2 pr=0 pw=0 time=0 us)' STAT #7 id=2 cnt=0 pid=1 pos=1 obj=0 op='NESTED LOOPS (cr=2 pr=0 pw=0 time=0 us)' STAT #7 id=3 cnt=0 pid=2 pos=1 obj=0 op='NESTED LOOPS (cr=2 pr=0 pw=0 time=0 us)' STAT #7 id=4 cnt=0 pid=3 pos=1 obj=84 op='TABLE ACCESS BY INDEX ROWID TRIGGER$ (cr=2 pr=0 pw=0 time=0 us)' STAT #7 id=5 cnt=0 pid=4 pos=1 obj=128 op='INDEX RANGE SCAN I_TRIGGER1 (cr=2 pr=0 pw=0 time=0 us)' STAT #7 id=6 cnt=0 pid=3 pos=2 obj=18 op='TABLE ACCESS BY INDEX ROWID OBJ$ (cr=0 pr=0 pw=0 time=0 us)' STAT #7 id=7 cnt=0 pid=6 pos=1 obj=36 op='INDEX UNIQUE SCAN I_OBJ1 (cr=0 pr=0 pw=0 time=0 us)' STAT #7 id=8 cnt=0 pid=2 pos=2 obj=22 op='TABLE ACCESS CLUSTER USER$ (cr=0 pr=0 pw=0 time=0 us)' STAT #7 id=9 cnt=0 pid=8 pos=1 obj=11 op='INDEX UNIQUE SCAN I_USER# (cr=0 pr=0 pw=0 time=0 us)' EXEC #19:c=83334,e=86016,p=0,cr=29,cu=21,mis=1,r=1,dep=1,og=1,tim=11746424138752 EXEC #19:c=0,e=0,p=0,cr=0,cu=1,mis=0,r=1,dep=1,og=1,tim=11746424138752 EXEC #19:c=0,e=0,p=0,cr=0,cu=1,mis=0,r=1,dep=1,og=1,tim=11746424138752 EXEC #19:c=0,e=0,p=0,cr=0,cu=1,mis=0,r=1,dep=1,og=1,tim=11746424139776 EXEC #19:c=0,e=0,p=0,cr=0,cu=1,mis=0,r=1,dep=1,og=1,tim=11746424139776 ===================== PARSING IN CURSOR #29 len=35 dep=1 uid=180 oct=3 lid=180 tim=11746424140800 hv=3788777626 ad='2c84eb58' SELECT COUNT(*) FROM SQL_TRACE_TEST END OF STMT PARSE #29:c=0,e=1024,p=0,cr=0,cu=0,mis=1,r=0,dep=1,og=1,tim=11746424140800 EXEC #29:c=0,e=1024,p=0,cr=0,cu=0,mis=0,r=0,dep=1,og=1,tim=11746424141824 FETCH #29:c=0,e=0,p=0,cr=7,cu=0,mis=0,r=1,dep=1,og=1,tim=11746424141824 ===================== PARSING IN CURSOR #4 len=6 dep=1 uid=180 oct=44 lid=180 tim=11746424141824 hv=255718823 ad='2e5363f0' COMMIT END OF STMT PARSE #4:c=0,e=0,p=0,cr=0,cu=0,mis=0,r=0,dep=1,og=1,tim=11746424141824 XCTEND rlbk=0, rd_only=0 EXEC #4:c=0,e=0,p=0,cr=0,cu=1,mis=0,r=0,dep=1,og=1,tim=11746424141824 EXEC #18:c=83334,e=91136,p=0,cr=36,cu=26,mis=0,r=1,dep=0,og=1,tim=11746424142848 WAIT #18: nam='SQL*Net message to client' ela= 0 p1=1413697536 p2=1 p3=0 WAIT #18: nam='SQL*Net message from client' ela= 1024 p1=1413697536 p2=1 p3=0 ===================== PARSING IN CURSOR #7 len=52 dep=0 uid=180 oct=47 lid=180 tim=11746424143872 hv=1029988163 ad='2c2ec1b8' BEGIN DBMS_OUTPUT.GET_LINES(:LINES, :NUMLINES); END; END OF STMT PARSE #7:c=0,e=0,p=0,cr=0,cu=0,mis=0,r=0,dep=0,og=1,tim=11746424143872 WAIT #7: nam='SQL*Net message to client' ela= 0 p1=1413697536 p2=1 p3=0 EXEC #7:c=0,e=0,p=0,cr=0,cu=0,mis=0,r=1,dep=0,og=1,tim=11746424144896 WAIT #7: nam='SQL*Net message from client' ela= 8560640 p1=1413697536 p2=1 p3=0 ===================== PARSING IN CURSOR #12 len=55 dep=0 uid=180 oct=42 lid=180 tim=11746432706560 hv=2655499671 ad='2a24eab8' ALTER SESSION SET EVENTS '10046 trace name context off' END OF STMT PARSE #12:c=0,e=0,p=0,cr=0,cu=0,mis=0,r=0,dep=0,og=1,tim=11746432705536 EXEC #12:c=0,e=0,p=0,cr=0,cu=0,mis=0,r=0,dep=0,og=1,tim=11746432706560
The following command uses the tkprof utility to translate the trace file, placing the translated output in the translated.txt file. The explain and table parameters have been set to allow execution plans to be displayed and the sys parameter prevents recursive SQL being displayed.
$ cd /u01/app/oracle/admin/DEV/udump/ $ tkprof dev1_ora_367660.trc translated.txt explain=test/test table=sys.plan_table sys=no waits=yes TKPROF: Release 10.1.0.3.0 - Production on Tue Apr 5 09:22:43 2005 Copyright (c) 1982, 2004, Oracle. All rights reserved. $
The contents of the translated file are displayed below.
TKPROF: Release 10.1.0.3.0 - Production on Tue Apr 5 09:53:50 2005
Copyright (c) 1982, 2004, Oracle. All rights reserved.
Trace file: dev1_ora_367660.trc
Sort options: default
********************************************************************************
count = number of times OCI procedure was executed
cpu = cpu time in seconds executing
elapsed = elapsed time in seconds executing
disk = number of physical reads of buffers from disk
query = number of buffers gotten for consistent read
current = number of buffers gotten in current mode (usually for update)
rows = number of rows processed by the fetch or execute call
********************************************************************************
ALTER SESSION SET EVENTS '10046 trace name context forever, level 8'
call count cpu elapsed disk query current rows
------- ------ -------- ---------- ---------- ---------- ---------- ----------
Parse 0 0.00 0.00 0 0 0 0
Execute 1 0.00 0.00 0 0 0 0
Fetch 0 0.00 0.00 0 0 0 0
------- ------ -------- ---------- ---------- ---------- ---------- ----------
total 1 0.00 0.00 0 0 0 0
Misses in library cache during parse: 0
Optimizer mode: ALL_ROWS
Parsing user id: 180 (TEST)
Elapsed times include waiting on following events:
Event waited on Times Max. Wait Total Waited
---------------------------------------- Waited ---------- ------------
SQL*Net message to client 1 0.00 0.00
SQL*Net message from client 1 7.35 7.35
********************************************************************************
BEGIN DBMS_OUTPUT.ENABLE(2000); END;
call count cpu elapsed disk query current rows
------- ------ -------- ---------- ---------- ---------- ---------- ----------
Parse 1 0.00 0.00 0 0 0 0
Execute 1 0.00 0.00 0 0 0 1
Fetch 0 0.00 0.00 0 0 0 0
------- ------ -------- ---------- ---------- ---------- ---------- ----------
total 2 0.00 0.00 0 0 0 1
Misses in library cache during parse: 0
Optimizer mode: ALL_ROWS
Parsing user id: 180 (TEST)
Elapsed times include waiting on following events:
Event waited on Times Max. Wait Total Waited
---------------------------------------- Waited ---------- ------------
SQL*Net message to client 1 0.00 0.00
SQL*Net message from client 1 6.92 6.92
********************************************************************************
BEGIN populate_sql_trace_test(p_loops => 5); END;
call count cpu elapsed disk query current rows
------- ------ -------- ---------- ---------- ---------- ---------- ----------
Parse 1 0.00 0.00 0 0 0 0
Execute 1 0.00 0.00 0 0 0 1
Fetch 0 0.00 0.00 0 0 0 0
------- ------ -------- ---------- ---------- ---------- ---------- ----------
total 2 0.00 0.00 0 0 0 1
Misses in library cache during parse: 1
Optimizer mode: ALL_ROWS
Parsing user id: 180 (TEST)
Elapsed times include waiting on following events:
Event waited on Times Max. Wait Total Waited
---------------------------------------- Waited ---------- ------------
SQL*Net message to client 1 0.00 0.00
SQL*Net message from client 1 0.00 0.00
********************************************************************************
INSERT INTO SQL_TRACE_TEST (ID, DESCRIPTION)
VALUES
(:B1 , 'Description for ' || :B1 )
call count cpu elapsed disk query current rows
------- ------ -------- ---------- ---------- ---------- ---------- ----------
Parse 1 0.00 0.00 0 0 0 0
Execute 5 0.00 0.00 0 1 25 5
Fetch 0 0.00 0.00 0 0 0 0
------- ------ -------- ---------- ---------- ---------- ---------- ----------
total 6 0.00 0.00 0 1 25 5
Misses in library cache during parse: 1
Misses in library cache during execute: 1
Optimizer mode: ALL_ROWS
Parsing user id: 180 (TEST) (recursive depth: 1)
Rows Execution Plan
------- ---------------------------------------------------
0 INSERT STATEMENT MODE: ALL_ROWS
********************************************************************************
SELECT COUNT(*)
FROM
SQL_TRACE_TEST
call count cpu elapsed disk query current rows
------- ------ -------- ---------- ---------- ---------- ---------- ----------
Parse 1 0.00 0.00 0 0 0 0
Execute 1 0.00 0.00 0 0 0 0
Fetch 1 0.00 0.00 0 7 0 1
------- ------ -------- ---------- ---------- ---------- ---------- ----------
total 3 0.00 0.00 0 7 0 1
Misses in library cache during parse: 1
Optimizer mode: ALL_ROWS
Parsing user id: 180 (TEST) (recursive depth: 1)
Rows Execution Plan
------- ---------------------------------------------------
0 SELECT STATEMENT MODE: ALL_ROWS
0 SORT (AGGREGATE)
0 TABLE ACCESS MODE: ANALYZED (FULL) OF 'SQL_TRACE_TEST'
(TABLE)
********************************************************************************
COMMIT
call count cpu elapsed disk query current rows
------- ------ -------- ---------- ---------- ---------- ---------- ----------
Parse 1 0.00 0.00 0 0 0 0
Execute 1 0.00 0.00 0 0 1 0
Fetch 0 0.00 0.00 0 0 0 0
------- ------ -------- ---------- ---------- ---------- ---------- ----------
total 2 0.00 0.00 0 0 1 0
Misses in library cache during parse: 0
Optimizer mode: ALL_ROWS
Parsing user id: 180 (TEST) (recursive depth: 1)
********************************************************************************
BEGIN DBMS_OUTPUT.GET_LINES(:LINES, :NUMLINES); END;
call count cpu elapsed disk query current rows
------- ------ -------- ---------- ---------- ---------- ---------- ----------
Parse 1 0.00 0.00 0 0 0 0
Execute 1 0.00 0.00 0 0 0 1
Fetch 0 0.00 0.00 0 0 0 0
------- ------ -------- ---------- ---------- ---------- ---------- ----------
total 2 0.00 0.00 0 0 0 1
Misses in library cache during parse: 0
Optimizer mode: ALL_ROWS
Parsing user id: 180 (TEST)
Elapsed times include waiting on following events:
Event waited on Times Max. Wait Total Waited
---------------------------------------- Waited ---------- ------------
SQL*Net message to client 1 0.00 0.00
SQL*Net message from client 1 8.56 8.56
********************************************************************************
ALTER SESSION SET EVENTS '10046 trace name context off'
call count cpu elapsed disk query current rows
------- ------ -------- ---------- ---------- ---------- ---------- ----------
Parse 1 0.00 0.00 0 0 0 0
Execute 1 0.00 0.00 0 0 0 0
Fetch 0 0.00 0.00 0 0 0 0
------- ------ -------- ---------- ---------- ---------- ---------- ----------
total 2 0.00 0.00 0 0 0 0
Misses in library cache during parse: 0
Optimizer mode: ALL_ROWS
Parsing user id: 180 (TEST)
********************************************************************************
OVERALL TOTALS FOR ALL NON-RECURSIVE STATEMENTS
call count cpu elapsed disk query current rows
------- ------ -------- ---------- ---------- ---------- ---------- ----------
Parse 4 0.00 0.00 0 0 0 0
Execute 5 0.00 0.00 0 0 0 3
Fetch 0 0.00 0.00 0 0 0 0
------- ------ -------- ---------- ---------- ---------- ---------- ----------
total 9 0.00 0.00 0 0 0 3
Misses in library cache during parse: 1
Elapsed times include waiting on following events:
Event waited on Times Max. Wait Total Waited
---------------------------------------- Waited ---------- ------------
SQL*Net message to client 4 0.00 0.00
SQL*Net message from client 4 8.56 22.84
OVERALL TOTALS FOR ALL RECURSIVE STATEMENTS
call count cpu elapsed disk query current rows
------- ------ -------- ---------- ---------- ---------- ---------- ----------
Parse 10 0.05 0.05 0 0 0 0
Execute 18 0.03 0.03 0 1 26 5
Fetch 12 0.00 0.00 0 35 0 9
------- ------ -------- ---------- ---------- ---------- ---------- ----------
total 40 0.08 0.08 0 36 26 14
Misses in library cache during parse: 7
Misses in library cache during execute: 6
8 user SQL statements in session.
7 internal SQL statements in session.
15 SQL statements in session.
2 statements EXPLAINed in this session.
********************************************************************************
Trace file: dev1_ora_367660.trc
Trace file compatibility: 10.01.00
Sort options: default
1 session in tracefile.
8 user SQL statements in trace file.
7 internal SQL statements in trace file.
15 SQL statements in trace file.
15 unique SQL statements in trace file.
2 SQL statements EXPLAINed using schema:
sys.plan_table
Schema was specified.
Existing table was used.
146 lines in trace file.
22 elapsed seconds in trace file.
For each statement executed by the session, the file contains a record of the parse, execute and fetch statistics, an execution plan where necessary and a list of session waits.
Trace Analyzer
In addition to TKPROF, Oracle provide another tool for analyzing SQL trace files called Trace Analyzer
. This is available for download from Metalink and can be installed on any version of the database server from Oracle8i upwards.
Trace Analyzer reads a raw SQL Trace file generated by standard SQL
Trace or by EVENT 10046 (Level 4, 8 or 12), and generates a
comprehensive HTML report with performance related details: time
summary, call summary (parse, execute, fetch), identification of top
SQL, row source plan, explain plan, CBO statistics, wait events, values
of bind variables, I/O summary per schema object, latches, hot blocks,
etc.
The HTML report includes all the details found on TKPROF, plus
additional information normally requested and used for a transaction
performance analysis.
For more information see:
Hope this helps. Regards Tim...
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