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select * from information_schema.system_variables
where variable_name like 'debug%'
order by variable_name;
VARIABLE_NAME DEBUG
SESSION_VALUE
GLOBAL_VALUE
GLOBAL_VALUE_ORIGIN COMPILE-TIME
DEFAULT_VALUE
VARIABLE_SCOPE SESSION
VARIABLE_TYPE VARCHAR
VARIABLE_COMMENT Built-in DBUG debugger
NUMERIC_MIN_VALUE NULL
NUMERIC_MAX_VALUE NULL
NUMERIC_BLOCK_SIZE NULL
ENUM_VALUE_LIST NULL
READ_ONLY NO
COMMAND_LINE_ARGUMENT OPTIONAL
VARIABLE_NAME DEBUG_BINLOG_FSYNC_SLEEP
SESSION_VALUE NULL
GLOBAL_VALUE 314
GLOBAL_VALUE_ORIGIN CONFIG
DEFAULT_VALUE 0
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BIGINT UNSIGNED
VARIABLE_COMMENT Extra sleep (in microseconds) to add to binlog fsync(), for debugging
NUMERIC_MIN_VALUE 0
NUMERIC_MAX_VALUE 4294967295
NUMERIC_BLOCK_SIZE 1
ENUM_VALUE_LIST NULL
READ_ONLY NO
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME DEBUG_CRC_BREAK
SESSION_VALUE NULL
GLOBAL_VALUE 0
GLOBAL_VALUE_ORIGIN COMPILE-TIME
DEFAULT_VALUE 0
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BIGINT UNSIGNED
VARIABLE_COMMENT Call my_debug_put_break_here() if crc matches this number (for debug)
NUMERIC_MIN_VALUE 0
NUMERIC_MAX_VALUE 18446744073709551615
NUMERIC_BLOCK_SIZE 1
ENUM_VALUE_LIST NULL
READ_ONLY NO
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME DEBUG_DBUG
SESSION_VALUE
GLOBAL_VALUE
GLOBAL_VALUE_ORIGIN COMPILE-TIME
DEFAULT_VALUE
VARIABLE_SCOPE SESSION
VARIABLE_TYPE VARCHAR
VARIABLE_COMMENT Built-in DBUG debugger
NUMERIC_MIN_VALUE NULL
NUMERIC_MAX_VALUE NULL
NUMERIC_BLOCK_SIZE NULL
ENUM_VALUE_LIST NULL
READ_ONLY NO
COMMAND_LINE_ARGUMENT OPTIONAL
VARIABLE_NAME DEBUG_MUTEX_DEADLOCK_DETECTOR
SESSION_VALUE NULL
GLOBAL_VALUE ON
GLOBAL_VALUE_ORIGIN COMPILE-TIME
DEFAULT_VALUE ON
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BOOLEAN
VARIABLE_COMMENT Enable checking of wrong mutex usage
NUMERIC_MIN_VALUE NULL
NUMERIC_MAX_VALUE NULL
NUMERIC_BLOCK_SIZE NULL
ENUM_VALUE_LIST OFF,ON
READ_ONLY YES
COMMAND_LINE_ARGUMENT OPTIONAL
VARIABLE_NAME DEBUG_NO_THREAD_ALARM
SESSION_VALUE NULL
GLOBAL_VALUE OFF
GLOBAL_VALUE_ORIGIN COMPILE-TIME
DEFAULT_VALUE OFF
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BOOLEAN
VARIABLE_COMMENT Disable system thread alarm calls. Disabling it may be useful in debugging or testing, never do it in production
NUMERIC_MIN_VALUE NULL
NUMERIC_MAX_VALUE NULL
NUMERIC_BLOCK_SIZE NULL
ENUM_VALUE_LIST OFF,ON
READ_ONLY YES
COMMAND_LINE_ARGUMENT OPTIONAL
VARIABLE_NAME DEBUG_SYNC
SESSION_VALUE ON - current signal: ''
GLOBAL_VALUE NULL
GLOBAL_VALUE_ORIGIN COMPILE-TIME
DEFAULT_VALUE
VARIABLE_SCOPE SESSION ONLY
VARIABLE_TYPE VARCHAR
VARIABLE_COMMENT Debug Sync Facility
NUMERIC_MIN_VALUE NULL
NUMERIC_MAX_VALUE NULL
NUMERIC_BLOCK_SIZE NULL
ENUM_VALUE_LIST NULL
READ_ONLY NO
COMMAND_LINE_ARGUMENT NULL
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