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MySQL 5.5 Reference Manual
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Excerpts from this Manual Starting the Server for the First Time

This section gives a general overview of starting the MySQL server. The following sections provide more specific information for starting the MySQL server from the command line or as a Windows service.

The information here applies primarily if you installed MySQL using the Noinstall version, or if you wish to configure and test MySQL manually rather than with the GUI tools.


MySQL server will automatically start after using MySQL Installer, and MySQL Notifier can be used to start/stop/restart at any time.

The examples in these sections assume that MySQL is installed under the default location of C:\Program Files\MySQL\MySQL Server 5.5. Adjust the path names shown in the examples if you have MySQL installed in a different location.

Clients have two options. They can use TCP/IP, or they can use a named pipe if the server supports named-pipe connections.

MySQL for Windows also supports shared-memory connections if the server is started with the --shared-memory option. Clients can connect through shared memory by using the --protocol=MEMORY option.

For information about which server binary to run, see Section, “Selecting a MySQL Server Type”.

Testing is best done from a command prompt in a console window (or DOS window). In this way you can have the server display status messages in the window where they are easy to see. If something is wrong with your configuration, these messages make it easier for you to identify and fix any problems.

To start the server, enter this command:

C:\> "C:\Program Files\MySQL\MySQL Server 5.5\bin\mysqld" --console

For a server that includes InnoDB support, you should see the messages similar to those following as it starts (the path names and sizes may differ):

InnoDB: The first specified datafile c:\ibdata\ibdata1 did not exist:
InnoDB: a new database to be created!
InnoDB: Setting file c:\ibdata\ibdata1 size to 209715200
InnoDB: Database physically writes the file full: wait...
InnoDB: Log file c:\iblogs\ib_logfile0 did not exist: new to be created
InnoDB: Setting log file c:\iblogs\ib_logfile0 size to 31457280
InnoDB: Log file c:\iblogs\ib_logfile1 did not exist: new to be created
InnoDB: Setting log file c:\iblogs\ib_logfile1 size to 31457280
InnoDB: Log file c:\iblogs\ib_logfile2 did not exist: new to be created
InnoDB: Setting log file c:\iblogs\ib_logfile2 size to 31457280
InnoDB: Doublewrite buffer not found: creating new
InnoDB: Doublewrite buffer created
InnoDB: creating foreign key constraint system tables
InnoDB: foreign key constraint system tables created
011024 10:58:25  InnoDB: Started

When the server finishes its startup sequence, you should see something like this, which indicates that the server is ready to service client connections:

mysqld: ready for connections
Version: '5.5.56'  socket: ''  port: 3306

The server continues to write to the console any further diagnostic output it produces. You can open a new console window in which to run client programs.

If you omit the --console option, the server writes diagnostic output to the error log in the data directory (C:\Program Files\MySQL\MySQL Server 5.5\data by default). The error log is the file with the .err extension, and may be set using the --log-error option.


The accounts that are listed in the MySQL grant tables initially have no passwords. After starting the server, you should set up passwords for them using the instructions in Section 2.10.4, “Securing the Initial MySQL Accounts”.

User Comments
  Posted by J.R. Titko on December 3, 2004
If mySql was installed as a service, then you may get an error indicating you already have a mySqld server running if you do the test procedure in this section. You can check the services that are running from your control pannel administrative tools for Computer Management. It will indicate if mySql has already been started.
  Posted by arshia attar on April 16, 2006
Test procedure.
The following command/result will test your installation.
OS: WinXp
Mysql: mysql-5.0.20-win32

<<< console 1 >>>
<<< to test the installation >>>
<<< open a new console (1) >>>
<<< assumed path C:\mysql\mysql-5.0.20-win32\ >>>
C:\mysql\mysql-5.0.20-win32\bin>mysqld-nt.exe --console

<<< in your console (1) you should see >>>
060416 1:26:36 InnoDB: Started; log sequence number 0 43655
060416 1:26:37 [Note] mysqld-nt.exe: ready for connections.
Version: '5.0.20-nt' socket: '' port: 3306 MySQL Community Edition (GPL)
060416 1:30:38 [Note] mysqld-nt.exe: Normal shutdown

<<< console 2 >>>
<<< to shutdown the running server >>>
<<< open a new console (2) >>>
C:\mysql\mysql-5.0.20-win32\bin>mysqladmin.exe -u root shutdown

<<< in your console (1) you should see >>>
060416 1:30:38 InnoDB: Starting shutdown...
060416 1:30:40 InnoDB: Shutdown completed; log sequence number 0 43655
060416 1:30:40 [Note] mysqld-nt.exe: Shutdown complete

  Posted by Joe McCann on April 22, 2008
If you installed WAMP and just want to run the MySQL server, from the command line go to C:/..path_to_installation../wamp/bin/mysql/bin/mysql-VERSION-NUMBER/bin/ directory.

From here type mysqld-nt.exe. Then unblock and you should be set.
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