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The error log file contains information indicating when mysqld
was started and stopped and also any critical errors that occur while the
server is running.
If mysqld dies unexpectedly and mysqld_safe needs to
restart it, mysqld_safe will write a restarted
mysqld message to the error log. If
mysqld notices a table that needs to be automatically checked or
repaired, it writes a message to the error log.
On some operating systems, the error log will contain a stack trace if
mysqld dies. The trace can be used to determine where
mysqld died. See section Using a Stack Trace.
Beginning with MySQL 4.0.10, you can specify where mysqld stores the
error log file with the option --log-error[=file_name]. If no
file_name value is given, mysqld uses the name
`host_name.err' and writes the file in the data directory.
(Prior to MySQL 4.0.10, the Windows error log name is `mysql.err'.)
If you execute FLUSH LOGS, the error log will be renamed with a suffix
of -old and mysqld creates a new empty log file.
In older MySQL versions on Unix, error log handling was done by
mysqld_safe which redirected the error file to
host_name.err. You could change this filename by specifying a
--err-log=filename option to mysqld_safe.
If you don't specify --log-error, or (on Windows) if you use the
--console option, errors are written to stderr, the standard error
output. Usually this is your terminal.
On Windows, error output is always written to the .err file if
--console is not given.
This document was generated on July, 26 2004 using texi2html 1.70.
