Oracle enable trace file

Burleson is the American Team Note: This Oracle documentation was created as a support and Oracle training reference for use by our DBA performance tuning consulting professionals. Feel free to ask questions on our Oracle forum. Verify experience! Identification of trace files is simpler in Oracle 11g due to the introduction of diagnostic views. In Oracle 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. 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.

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. Lists only the first integer sorted SQL statements from the output file.

This parameter does not affect the optional SQL script. Creates a SQL script that stores the trace file statistics in the database. This script creates a table and inserts a row of statistics for each traced SQL statement into the table. Specifies the schema and name of the table into which TKPROF temporarily places execution plans before writing them to the output file. These individuals can specify different TABLE values and avoid destructively interfering with each other's processing on the temporary plan table.

Determines the execution plan for each SQL statement in the trace file and writes these execution plans to the output file.

Note: Trace files generated immediately after instance startup contain data that reflects the activity of the startup process. For the purposes of tuning, ignore such trace files. You can use this script to replay the user events from the trace file. Each row corresponds to one of three steps of SQL statement processing. Statistics are identified by the value of the CALL column. See Table Translates the SQL statement into an execution plan, including checks for proper security authorization and checks for the existence of tables, columns, and other referenced objects.

Actual execution of the statement by Oracle Database. Retrieves rows returned by a query. The other columns of the SQL Trace facility output are combined statistics for all parses, executions, and fetches of a statement.

Total CPU time in seconds for all parse, execute, or fetch calls for the statement. Total elapsed time in seconds for all parse, execute, or fetch calls for the statement.

Total number of data blocks physically read from the data files on disk for all parse, execute, or fetch calls. Total number of buffers retrieved in consistent mode for all parse, execute, or fetch calls.

Usually, buffers are retrieved in consistent mode for queries. Total number of buffers retrieved in current mode. Statistics about the processed rows appear in the ROWS column. The column shows the number of rows processed by the SQL statement.

This total does not include rows processed by subqueries of the SQL statement. The row source counts are displayed when a cursor is closed. Exiting or reconnecting causes the counts to be displayed. These statistics appear on separate lines following the tabular statistics. In " Examples " , the statement resulted in one library cache miss for the parse step and no misses for the execute step.

In the TKPROF output, row source operations show the number of rows processed for each operation executed on the rows, and additional row source information, such as physical reads and writes. To ensure that wait events information is written to the trace file for the session, run the following SQL statement:. This example is likely to be longer than a single line on the screen, and you might need to use continuation characters, depending on the operating system.

You can use this to get access paths and row source counts. In this way, you can ignore internal Oracle Database statements such as temporary table operations. For greatest efficiency, always use SORT parameters. Views Relevant for Trace Statistics. Views Related to Enabling Tracing. The trace type specifies whether the trace is enabled for client identifier, session, service, database, or a combination of service, module, and action. Overview of End-to-End Application Tracing End-to-end application tracing can identify the source of an excessive database workload, such as a high load SQL statement, by client identifier, service, module, action, session, instance, or an entire database.

Purpose of End-to-End Application Tracing End-to-End application tracing simplifies diagnosing performance problems in multitier environments. End-to-End application tracing can identify workload problems for: Client identifier - specifies an end user based on the logon ID, such as HR.

HR Service - specifies a group of applications with common attributes, service level thresholds, and priorities; or a single application, such as ACCTG for an accounting application Module - specifies a functional block, such as Accounts Receivable or General Ledger, of an application Action - specifies an action, such as an INSERT or UPDATE operation, in a module Session - specifies a session based on a given database session identifier SID , on the local instance Instance - specifies a given instance based on the instance name.

Enable statistics gathering for oe. OE' ; Disable statistics gathering for oe. OE' ;. Enable statistics gathering for the desired service, module, and action.

This tutorial assumes the following: OE. You want to include wait information in the trace. You want to exclude bind information from the trace. Enable tracing for the client. You want to enable tracing only for the inst1 instance. Enable tracing for the service, module, and actions. This tutorial assumes the following: You want to log in to the database with administrator privileges.

User OE has one active session. You want to temporarily enable tracing for the OE session. However, this install does not include many of the Oracle Database tools. Oracle releases new versions of Oracle Trace File Analyzer several times a year.

These new releases include new features and bug fixes. To obtain the fullest capabilities of Oracle Trace File Analyzer, install it as root. No other users can perform diagnostic collections. If Oracle Trace File Analyzer is already installed, then reinstalling performs an upgrade to the existing location.

Cluster install requires passwordless SSH user equivalency for root to all cluster nodes. If not already configured, then the installation optionally sets up passwordless SSH user equivalency and then removes at the end.

If you do not wish to use passwordless SSH, then you install on each host using a local install. Run the tfactl syncnodes command to generate and deploy relevant SSL certificates. The installation configures Oracle Trace File Analyzer for auto-start.

The implementation of auto-start is platform-dependent. Linux uses init , or an init replacement, such as upstart or systemd. Microsoft Windows uses a Windows service. The daemon restarts at 1 am every day to discover any environment changes. The daemon runs a full local Oracle ORAchk check at 2 am every day, and a partial run of the most impactful checks every 6 hours through the oratier1 profile.

You can change the daemon settings after enabling auto start. To remove auto start any time, run tfactl run orachk -autostop. If you are unable to install as root , then install Oracle Trace File Analyzer as the Oracle home owner. To install as the Oracle home owner, use the —extractto option. Using the —extractto option tells Oracle Trace File Analyzer where to install to.

Also, use the —javahome option to indicate which JRE to use. Use the JRE already available in the Oracle home, unless you have a later version available.