(gdb) p global_system_variables $4 = {dynamic_variables_version = 80 dynamic_variables_ptr = 0x7f587288e208 "\001" dynamic_variables_head = 424 dynamic_variables_size = 432 max_heap_table_size = 16777216 tmp_memory_table_size = 16777216 tmp_disk_table_size = 18446744073709551615 long_query_time = 10000000 max_statement_time = 0 optimizer_switch = 34358820815 optimizer_trace = 0 optimizer_trace_max_mem_size = 1048576 sql_mode = 1411383296 old_behavior = 0 option_bits = 2147486464 join_buff_space_limit = 2097152 log_slow_filter = 1983 log_slow_verbosity = 0 log_slow_disabled_statements = 8 log_disabled_statements = 2 bulk_insert_buff_size = 8388608 join_buff_size = 262144 sortbuff_size = 2097152 group_concat_max_len = 1048576 default_regex_flags = 0 max_mem_used = 9223372036854775807 slave_skip_counter = 0 max_relay_log_size = 1073741824 select_limit = 18446744073709551615 max_join_size = 18446744073709551615 expensive_subquery_limit = 100 auto_increment_increment = 1 auto_increment_offset = 1 saved_auto_increment_increment = 1 saved_auto_increment_offset = 1 eq_range_index_dive_limit = 200 column_compression_zlib_strategy = 0 lock_wait_timeout = 86400 join_cache_level = 2 max_allowed_packet = 16777216 max_error_count = 64 max_length_for_sort_data = 1024 max_recursive_iterations = 4294967295 max_sort_length = 1024 max_tmp_tables = 32 max_insert_delayed_threads = 20 min_examined_row_limit = 0 multi_range_count = 256 net_buffer_length = 16384 net_interactive_timeout = 28800 net_read_timeout = 30 net_retry_count = 10 net_wait_timeout = 28800 net_write_timeout = 60 optimizer_prune_level = 1 optimizer_search_depth = 62 optimizer_selectivity_sampling_limit = 100 optimizer_use_condition_selectivity = 4 use_stat_tables = 4 sample_percentage = 100 histogram_size = 254 histogram_type = 1 preload_buff_size = 32768 profiling_history_size = 15 read_buff_size = 131072 read_rnd_buff_size = 262144 mrr_buff_size = 262144 div_precincrement = 4 rowid_merge_buff_size = 8388608 max_sp_recursion_depth = 0 default_week_format = 0 max_seeks_for_key = 4294967295 range_alloc_block_size = 4096 query_alloc_block_size = 16384 query_prealloc_size = 24576 trans_alloc_block_size = 8192 trans_prealloc_size = 4096 log_warnings = 2 log_slow_rate_limit = 1 binlog_format = 0 binlog_row_image = 2 progress_report_time = 5 completion_type = 0 query_cache_type = 1 tx_isolation = 2 updatable_views_with_limit = 1 alter_algorithm = 0 max_user_connections = 0 server_id = 1 pseudo_thread_id = 0 gtid_domain_id = 0 gtid_seq_no = 0 tx_read_only = 0 '\000' low_priority_updates = 0 '\000' query_cache_wlock_invalidate = 0 '\000' keep_files_on_create = 0 '\000' old_mode = 0 '\000' old_passwords = 0 '\000' big_tables = 0 '\000' only_standard_compliant_cte = 1 '\001' query_cache_strip_comments = 0 '\000' sql_log_slow = 0 '\000' sql_log_bin = 1 '\001' sql_log_bin_off = 0 '\000' binlog_annotate_row_events = 1 '\001' binlog_direct_non_trans_update = 0 '\000' column_compression_zlib_wrap = 0 '\000' table_plugin = 0x7f58728fde38 tmp_table_plugin = 0x0 enforced_table_plugin = 0x0 character_set_filesystem = 0x55a1a54bbfe0 character_set_client = 0x55a1a54ecda0 character_set_results = 0x55a1a54ecda0 collation_server = 0x55a1a54ecda0 collation_database = 0x55a1a54ecda0 collation_connection = 0x55a1a54ecda0 default_master_connection = {str = 0x0 length = 0} lc_messages = 0x55a1a553ec60 errmsgs = 0x7f5872856008 lc_time_names = 0x55a1a553ec60 time_zone = 0x55a1a553c668 sysdate_is_now = 0 '\000' wt_timeout_short = 10000 wt_deadlock_search_depth_short = 4 wt_timeout_long = 50000000 wt_deadlock_search_depth_long = 15 wsrep_on = 0 '\000' wsrep_causal_reads = 0 '\000' wsrep_sync_wait = 0 wsrep_retry_autocommit = 1 wsrep_trx_fragment_size = 0 wsrep_trx_fragment_unit = 0 wsrep_OSU_method = 0 wsrep_dirty_reads = 0 '\000' long_query_time_double = 10 max_statement_time_double = 0 pseudo_slave_mode = 0 '\000' session_track_system_variables = 0x55a1a4df8f20 "autocommit character_set_client character_set_connection character_set_results time_zone" session_track_transaction_info = 0 session_track_schema = 1 '\001' session_track_state_change = 0 '\000' tcp_nodelay = 1 '\001' threadpool_priority = 2 idle_transaction_timeout = 0 idle_readonly_transaction_timeout = 0 idle_write_transaction_timeout = 0 --Type for more q to quit c to continue without paging-- column_compression_threshold = 100 column_compression_zlib_level = 6 in_subquery_conversion_threshold = 1000 max_rowid_filter_size = 131072 vers_asof_timestamp = {type = 0 ltime = {year = 0 month = 0 day = 0 hour = 0 minute = 0 second = 0 second_part = 0 neg = 0 '\000' time_type = MYSQL_TIMESTAMP_DATE}} vers_alter_history = 0}