Variables

Description

The SHOW VARIABLES command provides a name value pair of various Internal variables.
There is a GLOBAL and SESSION scope. Refer to Server Option and Variable Reference in the MySQL Reference Manual for more details on the scope of variables.

Syntax

MySQL/MariaDB

mysql> SHOW GLOBAL VARIABLES;
$ mysqladmin variables

Drizzle

drizzle> SHOW GLOBAL VARIABLES;

Notes

Example

mysql> SHOW GLOBAL VARIABLES;
+---------------------------------+-----------------------------------------------------------+
| Variable_name                   | Value                                                     |
+---------------------------------+-----------------------------------------------------------+
| auto_increment_increment        | 1                                                         |
| auto_increment_offset           | 1                                                         |
| autocommit                      | ON                                                        |
| automatic_sp_privileges         | ON                                                        |
| back_log                        | 50                                                        |
| basedir                         | /opt/mysql-5.1.25-rc-linux-x86_64-glibc23/                |
| big_tables                      | OFF                                                       |
| binlog_cache_size               | 32768                                                     |
| binlog_format                   | MIXED                                                     |
| bulk_insert_buffer_size         | 8388608                                                   |
| character_set_client            | latin1                                                    |
| character_set_connection        | latin1                                                    |
| character_set_database          | latin1                                                    |
| character_set_filesystem        | binary                                                    |
| character_set_results           | latin1                                                    |
| character_set_server            | latin1                                                    |
| character_set_system            | utf8                                                      |
| character_sets_dir              | /opt/mysql-5.1.25-rc-linux-x86_64-glibc23/share/charsets/ |
| collation_connection            | latin1_swedish_ci                                         |
| collation_database              | latin1_swedish_ci                                         |
| collation_server                | latin1_swedish_ci                                         |
| completion_type                 | 0                                                         |
| concurrent_insert               | 1                                                         |
| connect_timeout                 | 10                                                        |
| datadir                         | /opt/mysql51/data/                                        |
| date_format                     | %Y-%m-%d                                                  |
| datetime_format                 | %Y-%m-%d %H:%i:%s                                         |
| default_week_format             | 0                                                         |
| delay_key_write                 | ON                                                        |
| delayed_insert_limit            | 100                                                       |
| delayed_insert_timeout          | 300                                                       |
| delayed_queue_size              | 1000                                                      |
| div_precision_increment         | 4                                                         |
| engine_condition_pushdown       | ON                                                        |
| error_count                     | 0                                                         |
| event_scheduler                 | OFF                                                       |
| expire_logs_days                | 0                                                         |
| flush                           | OFF                                                       |
| flush_time                      | 0                                                         |
| foreign_key_checks              | ON                                                        |
| ft_boolean_syntax               | + -><()~*:""&|                                            |
| ft_max_word_len                 | 84                                                        |
| ft_min_word_len                 | 4                                                         |
| ft_query_expansion_limit        | 20                                                        |
| ft_stopword_file                | (built-in)                                                |
| general_log                     | OFF                                                       |
| general_log_file                | /opt/mysql51/data/dc1.log                                 |
| group_concat_max_len            | 1024                                                      |
| have_community_features         | NO                                                        |
| have_compress                   | YES                                                       |
| have_crypt                      | YES                                                       |
| have_csv                        | YES                                                       |
| have_dynamic_loading            | YES                                                       |
| have_geometry                   | YES                                                       |
| have_innodb                     | YES                                                       |
| have_ndbcluster                 | NO                                                        |
| have_openssl                    | DISABLED                                                  |
| have_partitioning               | YES                                                       |
| have_query_cache                | YES                                                       |
| have_rtree_keys                 | YES                                                       |
| have_ssl                        | DISABLED                                                  |
| have_symlink                    | YES                                                       |
| hostname                        | dc1.onegreendog.com                                       |
| identity                        | 0                                                         |
| init_connect                    |                                                           |
| init_file                       |                                                           |
| init_slave                      |                                                           |
| innodb_adaptive_hash_index      | ON                                                        |
| innodb_additional_mem_pool_size | 1048576                                                   |
| innodb_autoextend_increment     | 8                                                         |
| innodb_autoinc_lock_mode        | 1                                                         |
| innodb_buffer_pool_size         | 8388608                                                   |
| innodb_checksums                | ON                                                        |
| innodb_commit_concurrency       | 0                                                         |
| innodb_concurrency_tickets      | 500                                                       |
| innodb_data_file_path           | ibdata1:10M:autoextend                                    |
| innodb_data_home_dir            |                                                           |
| innodb_doublewrite              | ON                                                        |
| innodb_fast_shutdown            | 1                                                         |
| innodb_file_io_threads          | 4                                                         |
| innodb_file_per_table           | OFF                                                       |
| innodb_flush_log_at_trx_commit  | 1                                                         |
| innodb_flush_method             |                                                           |
| innodb_force_recovery           | 0                                                         |
| innodb_lock_wait_timeout        | 50                                                        |
| innodb_locks_unsafe_for_binlog  | OFF                                                       |
| innodb_log_buffer_size          | 1048576                                                   |
| innodb_log_file_size            | 5242880                                                   |
| innodb_log_files_in_group       | 2                                                         |
| innodb_log_group_home_dir       | ./                                                        |
| innodb_max_dirty_pages_pct      | 90                                                        |
| innodb_max_purge_lag            | 0                                                         |
| innodb_mirrored_log_groups      | 1                                                         |
| innodb_open_files               | 300                                                       |
| innodb_rollback_on_timeout      | OFF                                                       |
| innodb_support_xa               | ON                                                        |
| innodb_sync_spin_loops          | 20                                                        |
| innodb_table_locks              | ON                                                        |
| innodb_thread_concurrency       | 8                                                         |
| innodb_thread_sleep_delay       | 10000                                                     |
| insert_id                       | 0                                                         |
| interactive_timeout             | 28800                                                     |
| join_buffer_size                | 131072                                                    |
| keep_files_on_create            | OFF                                                       |
| key_buffer_size                 | 8388600                                                   |
| key_cache_age_threshold         | 300                                                       |
| key_cache_block_size            | 1024                                                      |
| key_cache_division_limit        | 100                                                       |
| language                        | /opt/mysql-5.1.25-rc-linux-x86_64-glibc23/share/english/  |
| large_files_support             | ON                                                        |
| large_page_size                 | 0                                                         |
| large_pages                     | OFF                                                       |
| last_insert_id                  | 0                                                         |
| lc_time_names                   | en_US                                                     |
| license                         | GPL                                                       |
| local_infile                    | ON                                                        |
| locked_in_memory                | OFF                                                       |
| log                             | OFF                                                       |
| log_bin                         | OFF                                                       |
| log_bin_trust_function_creators | OFF                                                       |
| log_bin_trust_routine_creators  | OFF                                                       |
| log_error                       | /opt/mysql51/data/dc1.onegreendog.com.err                 |
| log_output                      | FILE                                                      |
| log_queries_not_using_indexes   | OFF                                                       |
| log_slave_updates               | OFF                                                       |
| log_slow_queries                | OFF                                                       |
| log_warnings                    | 1                                                         |
| long_query_time                 | 10.000000                                                 |
| low_priority_updates            | OFF                                                       |
| lower_case_file_system          | OFF                                                       |
| lower_case_table_names          | 0                                                         |
| max_allowed_packet              | 1048576                                                   |
| max_binlog_cache_size           | 18446744073709551615                                      |
| max_binlog_size                 | 1073741824                                                |
| max_connect_errors              | 10                                                        |
| max_connections                 | 151                                                       |
| max_delayed_threads             | 20                                                        |
| max_error_count                 | 64                                                        |
| max_heap_table_size             | 134217728                                                 |
| max_insert_delayed_threads      | 20                                                        |
| max_join_size                   | 18446744073709551615                                      |
| max_length_for_sort_data        | 1024                                                      |
| max_prepared_stmt_count         | 16382                                                     |
| max_relay_log_size              | 0                                                         |
| max_seeks_for_key               | 18446744073709551615                                      |
| max_sort_length                 | 1024                                                      |
| max_sp_recursion_depth          | 0                                                         |
| max_tmp_tables                  | 32                                                        |
| max_user_connections            | 0                                                         |
| max_write_lock_count            | 18446744073709551615                                      |
| min_examined_row_limit          | 0                                                         |
| multi_range_count               | 256                                                       |
| myisam_data_pointer_size        | 6                                                         |
| myisam_max_sort_file_size       | 9223372036854775807                                       |
| myisam_recover_options          | OFF                                                       |
| myisam_repair_threads           | 1                                                         |
| myisam_sort_buffer_size         | 8388608                                                   |
| myisam_stats_method             | nulls_unequal                                             |
| myisam_use_mmap                 | OFF                                                       |
| net_buffer_length               | 16384                                                     |
| net_read_timeout                | 30                                                        |
| net_retry_count                 | 10                                                        |
| net_write_timeout               | 60                                                        |
| new                             | OFF                                                       |
| old                             | OFF                                                       |
| old_alter_table                 | OFF                                                       |
| old_passwords                   | OFF                                                       |
| open_files_limit                | 1024                                                      |
| optimizer_prune_level           | 1                                                         |
| optimizer_search_depth          | 62                                                        |
| pid_file                        | /opt/mysql51/data/dc1.onegreendog.com.pid                 |
| plugin_dir                      | /opt/mysql-5.1.25-rc-linux-x86_64-glibc23/lib/plugin      |
| port                            | 3306                                                      |
| preload_buffer_size             | 32768                                                     |
| protocol_version                | 10                                                        |
| pseudo_thread_id                | 0                                                         |
| query_alloc_block_size          | 8192                                                      |
| query_cache_limit               | 1048576                                                   |
| query_cache_min_res_unit        | 4096                                                      |
| query_cache_size                | 0                                                         |
| query_cache_type                | ON                                                        |
| query_cache_wlock_invalidate    | OFF                                                       |
| query_prealloc_size             | 8192                                                      |
| rand_seed1                      |                                                           |
| rand_seed2                      |                                                           |
| range_alloc_block_size          | 4096                                                      |
| read_buffer_size                | 131072                                                    |
| read_only                       | OFF                                                       |
| read_rnd_buffer_size            | 262144                                                    |
| relay_log                       |                                                           |
| relay_log_index                 |                                                           |
| relay_log_info_file             | relay-log.info                                            |
| relay_log_purge                 | ON                                                        |
| relay_log_space_limit           | 0                                                         |
| report_host                     |                                                           |
| report_password                 |                                                           |
| report_port                     | 3306                                                      |
| report_user                     |                                                           |
| rpl_recovery_rank               | 0                                                         |
| secure_auth                     | OFF                                                       |
| secure_file_priv                |                                                           |
| server_id                       | 0                                                         |
| skip_external_locking           | ON                                                        |
| skip_networking                 | OFF                                                       |
| skip_show_database              | OFF                                                       |
| slave_compressed_protocol       | OFF                                                       |
| slave_exec_mode                 | STRICT                                                    |
| slave_load_tmpdir               | /tmp                                                      |
| slave_net_timeout               | 3600                                                      |
| slave_skip_errors               | OFF                                                       |
| slave_transaction_retries       | 10                                                        |
| slow_launch_time                | 2                                                         |
| slow_query_log                  | OFF                                                       |
| slow_query_log_file             | /opt/mysql51/data/dc1-slow.log                            |
| socket                          | /tmp/mysql.sock                                           |
| sort_buffer_size                | 2097144                                                   |
| sql_auto_is_null                | ON                                                        |
| sql_big_selects                 | ON                                                        |
| sql_big_tables                  | OFF                                                       |
| sql_buffer_result               | OFF                                                       |
| sql_log_bin                     | ON                                                        |
| sql_log_off                     | OFF                                                       |
| sql_log_update                  | ON                                                        |
| sql_low_priority_updates        | OFF                                                       |
| sql_max_join_size               | 18446744073709551615                                      |
| sql_mode                        |                                                           |
| sql_notes                       | ON                                                        |
| sql_quote_show_create           | ON                                                        |
| sql_safe_updates                | OFF                                                       |
| sql_select_limit                | 18446744073709551615                                      |
| sql_slave_skip_counter          |                                                           |
| sql_warnings                    | OFF                                                       |
| ssl_ca                          |                                                           |
| ssl_capath                      |                                                           |
| ssl_cert                        |                                                           |
| ssl_cipher                      |                                                           |
| ssl_key                         |                                                           |
| storage_engine                  | MyISAM                                                    |
| sync_binlog                     | 0                                                         |
| sync_frm                        | ON                                                        |
| system_time_zone                | CST                                                       |
| table_definition_cache          | 256                                                       |
| table_lock_wait_timeout         | 50                                                        |
| table_open_cache                | 64                                                        |
| table_type                      | MyISAM                                                    |
| thread_cache_size               | 0                                                         |
| thread_handling                 | one-thread-per-connection                                 |
| thread_stack                    | 262144                                                    |
| time_format                     | %H:%i:%s                                                  |
| time_zone                       | SYSTEM                                                    |
| timed_mutexes                   | OFF                                                       |
| timestamp                       | 1250574262                                                |
| tmp_table_size                  | 16777216                                                  |
| tmpdir                          | /tmp                                                      |
| transaction_alloc_block_size    | 8192                                                      |
| transaction_prealloc_size       | 4096                                                      |
| tx_isolation                    | REPEATABLE-READ                                           |
| unique_checks                   | ON                                                        |
| updatable_views_with_limit      | YES                                                       |
| version                         | 5.1.25-rc                                                 |
| version_comment                 | MySQL Community Server (GPL)                              |
| version_compile_machine         | x86_64                                                    |
| version_compile_os              | redhat-linux-gnu                                          |
| wait_timeout                    | 28800                                                     |
| warning_count                   | 0                                                         |
+---------------------------------+-----------------------------------------------------------+
265 rows in set (0.01 sec)
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