Table of Contents
Introduction
In this tutorial, we will explore how to use TKPROF with a trace analyzer to trace SQL in an Oracle Database Server. Optimizing SQL performance is crucial for the efficiency and responsiveness of your database applications. One of the powerful tools available for this purpose is TKPROF, a trace file analyzer provided by Oracle.
This guide will introduce you to TKPROF and show you how to use it effectively to trace and analyze SQL performance. By understanding and utilizing TKPROF, you can gain deep insights into your SQL execution, identify performance bottlenecks, and make informed optimizations to enhance your database’s performance.
Syntax of the TKPROF Command
The TKPROF command has several options that allow you to customize its behavior. Here is the syntax:
tkprof tracefile outputfile [explain= ] [table= ]
[print= ] [insert= ] [sys= ] [sort= ]Options of TKPROF command
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: Aggregate multiple trace files.
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 times 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: user ID of the user that parsed the cursorHow to Use Trace Analyzer to Trace SQL
Connect to the Database
[oracle11g@DBdevopsroles ~]$ sqlplus DBUSER/DBUSER@ORACLE_SID
SQL> set termout off
SQL> alter session set timed_statistics = true;
SQL> alter session set sql_trace = true;
SQL> SELECT COUNT(*) from tablename01;
SQL> alter session set sql_trace = false;Use Trace with TKPROF Command
[oracle11g@DBdevopsroles ~]$ tkprof /app/oracle11g/diag/rdbms/ORACLE_SID/trace/ORACLE_SID_ora_4196.trc ORACLE_SID_ora_4196.txt explain=DBUSER/DBUSER@ORACLE_SID width=200Confirm Output Destination
SQL> show parameter user_dump_dest
Conclusion
In this tutorial, we covered how to use the TKPROF command with a trace analyzer to trace SQL in an Oracle Database. Using TKPROF to analyze SQL performance is an invaluable skill for any database administrator or developer. By following the steps outlined in this guide, you should now be able to trace and analyze SQL execution efficiently, uncover performance issues, and implement necessary optimizations.
Continuous monitoring and analysis with TKPROF will ensure that your SQL queries run smoothly and efficiently, contributing to the overall health and performance of your database systems. Keep exploring and mastering TKPROF to become proficient in SQL performance tuning. Thank you for reading the DevopsRoles page!
