What is tkprof and how is it used?
- Tkprof is a performance diagnosing utility available to DBAs. ...
- When a user comes across problems related to the response time in comparison to his previous weeks response time, Session tracing and tkprof can be used to see exactly what ...
- At times, viewing SQL that is being executed for an application will be the only mechanism a DBA will have. ...
What is tkprof in SQL?
TKPROF is an acronym for the T ransient K ernel PROF ile, set via the sql_trace parameter, used to format a trace file into readable form. In addition to TKPROF, see here for using trace analyzer to trace SQL and complete directions for using TKPROF in the book "Advanced Oracle Utilities":
What is a tkprof trace file?
The TKPROF trace file name is version specific. ... TKPROF is an acronym for the Transient Kernel PROFile, set via the sql_trace parameter, used to format a trace file into readable form.
How does Oracle tkprof tracing work?
Once tracing with Oracle TKPROF is enabled, Oracle generates and stores the statistics in the trace file. The TKPROF trace file name is version specific. Enable Oracle TKPROF tracing only on those sessions that are having problems.
What is the tkprof program?
The TKPROF program converts Oracle trace files into a more readable form. If you have a problem query you can user TKPROF to get more information. To get the most out of the utility you must enable timed statistics by setting the init.ora parameter or performing the following command.
What is Tkprof Oracle Apps?
The TKPROF program converts Oracle trace files into a more readable form. If you have a problem query you can user TKPROF to get more information. To get the most out of the utility you must enable timed statistics by setting the init.
How do you read a Tkprof output?
Each tkprof output file contains a header, body, and summary section. The header simply displays the trace file name, definitions, and sort options selected. The body contains the performance metrics for SQL statements.
What is the use of trace file in Oracle?
Oracle Database for Windows background threads use trace files to record occurrences and exceptions of database operations, and errors.
What is SQL trace in Oracle?
The SQL trace facility and TKPROF are two basic performance diagnostic tools which can help you monitor and tune applications that run against the Oracle Server.
What is Tkprof and how is it used?
TKPROF determines execution plans by issuing the EXPLAIN PLAN statement after connecting to Oracle with the user and password specified in this parameter. The specified user must have CREATE SESSION system privileges. TKPROF takes longer to process a large trace file if the EXPLAIN option is used.
How do I create a trace file?
You use the optional trace=true parameter with the replay command to generate trace files in XML format. If you use this parameter, for each activity in the HAR file, EPM Automate creates a trace file that contains Smart View response to the activity. Trace files are named trace-N. xml ; for example, trace-1.
Can I delete TRC and TRM files?
trc, *. trm or *. log. For the alert log, it's a little different, you can delete or trim it for reducing the size of the file.
What is TRM and TRC files in Oracle?
trm” extensions, are called Trace Metadata files. The metadata in . trm files describe the trace records stored inside of . trc trace files. The Trace metadata allows tools, such as Adrci, to post process the trace information.
Can we delete all trace files in Oracle?
You can eliminate all the files ". TRC" (trace files) to purify the directory BDUMP. These are not necessary files in order that the Oracle Server works.
Where are Oracle trace files located?
The default trace location is located in: ORACLE_HOME\diag\rdbms\your_database\trace. The trace files of interest have the words on_logon appended to the end of the file name.
How do I read a trace file?
Open a trace log using TraceviewStart Android Device Monitor.In the Android Device Monitor, select File > Open File.Navigate to the . trace file you want to inspect.Click Open.
How do I trace a session?
You can enable SQL Trace for your own session with the following SQL statement: ALTER SESSION SET SQL_TRACE = TRUE; Alternately, from PL/SQL, you can make the following procedure call: DBMS_SESSION.
Where is the trace file in Oracle?
Trace files are stored in the Automatic Diagnostic Repository (ADR), in the trace directory under each ADR home.
Where is the trace file located?
The default trace location is located in: ORACLE_HOME\diag\rdbms\your_database\trace. The trace files of interest have the words on_logon appended to the end of the file name.
What are TRC files?
What is a TRC file? A file with . trc extension contains the trace results of the activity of a Miscrosoft SQL server database. These files are created by a software SQL Server Profiler; usually packaged with Microsoft SQL Server software.
What is the use of trace file in Ns2?
The Ns2 log or trace files gather the required information that can be visualised, such as in the NAM animator [4], or could be used in a network and protocol performance study, for example, the amount of packets transferred, delay, and packet loss.
What happens if a suitable plan table is not present?
If a suitable plan table is not present one can be created by doing the fooling as the SYS user.
What is the output file of SQL?
The resulting output file contains the following type of information for all SQL statements processed, including the ALTER SESSION commands.
What is TKPROF in Oracle?
As an Oracle specialist you’ve probably heard of SQL Trace and it’s brother tkprof. SQL Trace generates a low level trace file that has a complete chronological record of everything a session is doing and waiting for when it “talks” to the database. TKPROF on the other hand takes that trace file and aggregates all of the low level details in an easy to read report. This report can then be quickly analyzed to find the root cause of the slow performance.
What is TKprof used for?
My #1 use-case for TKPROF is when I am tracing a bad performing batch job. Batch jobs work on a large set of data either looping over each record or performing a set operation on all of them. And for this reason a batch job is usually long running and a developer will typically have an expectation when it should complete. When a job doesn’t complete on time – you will either get a call to look into the problem or your monitoring system will alert you that there is a long running process consuming large resources on the database server.
How to get an explain plan using TKprof?
To get an explain plan using TKPROF simply append one more parameter to it’s call explain=username/password ( NOTE: the username should have access to the objects in the sql you are after):
Does TKprof work in a lab?
There are a lot of samples online showing the use of TKPROF in a lab environment. But I haven’t seen one that actually shows you a real use-case similar to what you’ll face on your job. So instead of giving you all possible options of turning on SQL Trace and all possible flags TKPROF utility accepts I’ll show you exactly how and when I use it with a real example. Sounds good?