| title | description | author | ms.author | ms.date | ms.service | ms.subservice | ms.topic | helpviewer_keywords | |||
|---|---|---|---|---|---|---|---|---|---|---|---|
default trace enabled (server configuration option) |
Learn about the default trace enabled option. Find out how default tracing can help with troubleshooting. |
rwestMSFT |
randolphwest |
03/02/2017 |
sql |
configuration |
conceptual |
|
[!INCLUDE SQL Server]
Use the default trace enabled option to enable or disable the default trace log files. The default trace functionality provides a rich, persistent log of activity and changes primarily related to the configuration options.
Warning
[!INCLUDEssNoteDepFutureAvoid] Use Extended Events instead.
Default trace provides troubleshooting assistance to database administrators by ensuring that they have the log data necessary to diagnose problems the first time they occur.
The default trace logs can be opened and examined by [!INCLUDEssSqlProfiler] or queried with [!INCLUDEtsql] by using the fn_trace_gettable system function. [!INCLUDEssSqlProfiler] can open the default trace log files just as it does normal trace output files. The default trace log is stored by default in the \MSSQL\LOG directory using a rollover trace file. The base file name for the default trace log file is log.trc. In a typical installation of [!INCLUDEssNoVersion], the default trace is enabled and thus becomes TraceID 1. If enabled after installation and after creating other traces, the TraceID can become a larger number.
For more information about using [!INCLUDEssNoVersion] Profiler to view this trace file, see Open a Trace File (SQL Server Profiler)
The following statement opens the default trace log in the default location:
SELECT *
FROM fn_trace_gettable
('C:\Program Files\Microsoft SQL Server\MSSQL13.MSSQLSERVER\MSSQL\LOG\log.trc', default);
GO
When set to 1, the default trace enabled option enables Default Trace. The default setting for this option is 1 (ON). A value of 0 turns off the trace.
The default trace enabled option is an advanced option. If you are using the sp_configure system stored procedure to change the setting, you can change the default trace enabled option only when show advanced options is set to 1. The setting takes effect immediately without a server restart.
RECONFIGURE (Transact-SQL)
Server Configuration Options (SQL Server)
sp_configure (Transact-SQL)