Server System Variables Scope Global Dynamic Yes SET_VAR  Hint Applies No Type Enumeration Default Value UTC Valid Values UTC SYSTEM Command-Line Format --log-throttle-queries-not-using- indexes=# System Variable log_throttle_queries_not_using_indexes Scope Global Dynamic Yes SET_VAR  Hint Applies No Type Integer Default Value 0 Command-Line Format --long-query-time=# System Variable long_query_time Scope Global, Session Dynamic Yes SET_VAR  Hint Applies No Type Numeric Default Value 10 824 • long_query_time • log_throttle_queries_not_using_indexes This variable controls the time zone of timestamps in messages written to the error log, and in general query log and slow query log messages written to files. It does not affect the time zone of general query log and slow query log messages written to tables ( mysql.general_log ,  mysql.slow_log ). Rows retrieved from those tables can be converted from the local system time zone to any desired time zone with  CONVERT_TZ()  or by setting the session  time_zone  system variable. Permitted  log_timestamps  values are  UTC  (the default) and  SYSTEM  (the local system time zone). Timestamps are written using ISO 8601 / RFC 3339 format:  YYYY-MM-DD T hh:mm:ss.uuuuuu  plus a tail value of  Z  signifying Zulu time (UTC) or  –hh:mm  (an offset from UTC). If  log_queries_not_using_indexes  is enabled, the log_throttle_queries_not_using_indexes  variable limits the number of such queries per minute that can be written to the slow query log. A value of 0 (the default) means “no limit” . For more information, see Section 5.4.5, “The Slow Query Log” .