(mysql.info) error-log

 
 5.12.1 The Error Log
 --------------------
 
 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' 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 contains a stack trace if
 `mysqld' dies. The trace can be used to determine where `mysqld' died.
 See  using-stack-trace.
 
 If `mysqld' dies unexpectedly and `mysqld_safe' needs to restart it,
 `mysqld_safe' writes a `restarted mysqld' message to the error log.
 
 You can specify where `mysqld' stores the error log file with the
 -log-error[=FILE_NAME] option. If no FILE_NAME value is given, `mysqld'
 uses the name `HOST_NAME.err' and writes the file in the data
 directory. If you execute `FLUSH LOGS', the error log is renamed with
 the suffix `-old' and `mysqld' creates a new empty log file. (No
 renaming occurs if the -log-error option was not given.)
 
 If you do not 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.
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