If the mysqld server does not start or it crashes easily, you can try to create a trace file to find the problem.
To do this, you must have a mysqld that has
been compiled with debugging support. You can check this by
mysqld -V. If the version number
-debug, it is compiled with
support for trace files. (On Windows, the debugging server is
named mysqld-debug rather than
Start the mysqld server with a trace log in
/tmp/mysqld.trace on Unix or
\mysqld.trace on Windows:
shell> mysqld --debug
C:\> mysqld-debug --debug --standalone
The trace file can become very large! To generate a smaller trace file, you can use debugging options something like this:
This only prints information with the most interesting tags to the trace file.
If you file a bug, please add only those lines from the trace file to the bug report that indicate where something seems to go wrong. If you cannot locate the wrong place, open a bug report and upload the whole trace file to the report, so that a MySQL developer can take a look at it. For instructions, see Section 1.6, “How to Report Bugs or Problems”.
The trace file is made with the DBUG package by Fred Fish. See Section 24.5.3, “The DBUG Package”.