• slow_launch_time • slow_query_log • slow_query_log_file • socket Server System Variables Command-Line Format --slow-launch-time=# System Variable slow_launch_time Scope Global Dynamic Yes SET_VAR  Hint Applies No Type Integer Default Value 2 Command-Line Format --slow-query-log[={OFF|ON}] System Variable slow_query_log Scope Global Dynamic Yes SET_VAR  Hint Applies No Type Boolean Default Value OFF Command-Line Format --slow-query-log-file=file_name System Variable slow_query_log_file Scope Global Dynamic Yes SET_VAR  Hint Applies No Type File name Default Value host_name-slow.log Command-Line Format --socket={file_name|pipe_name} System Variable socket 883 If creating a thread takes longer than this many seconds, the server increments the Slow_launch_threads  status variable. Whether the slow query log is enabled. The value can be 0 (or  OFF ) to disable the log or 1 (or  ON ) to enable the log. The destination for log output is controlled by the  log_output  system variable; if that value is  NONE , no log entries are written even if the log is enabled. “Slow”  is determined by the value of the  long_query_time  variable. See Section 5.4.5, “The Slow Query Log” . The name of the slow query log file. The default value is  host_name -slow.log , but the initial value can be changed with the  --slow_query_log_file  option.