Spec-Zone.ru › MySQL 9.2

17.15.6 Таблица метрик InnoDB INFORMATION_SCHEMA

Таблица INNODB_METRICS предоставляет информацию о производительности InnoDB и связанных с ресурсами счетчиках.

Ниже показаны столбцы таблицы INNODB_METRICS. Описание столбцов см. в разделе 28.4.21, «Таблица INFORMATION_SCHEMA INNODB_METRICS». 

mysql> SELECT * FROM INFORMATION_SCHEMA.INNODB_METRICS WHERE NAME="dml_inserts" \G
*************************** 1. row ***************************
           NAME: dml_inserts
      SUBSYSTEM: dml
          COUNT: 46273
      MAX_COUNT: 46273
      MIN_COUNT: NULL
      AVG_COUNT: 492.2659574468085
    COUNT_RESET: 46273
MAX_COUNT_RESET: 46273
MIN_COUNT_RESET: NULL
AVG_COUNT_RESET: NULL
   TIME_ENABLED: 2014-11-28 16:07:53
  TIME_DISABLED: NULL
   TIME_ELAPSED: 94
     TIME_RESET: NULL
         STATUS: enabled
           TYPE: status_counter
        COMMENT: Number of rows inserted

Включение, отключение и сброс счетчиков

Вы можете включить, отключить и сбросить счетчики, используя следующие переменные:

  • innodb_monitor_enable: Включает счетчики. 

    SET GLOBAL innodb_monitor_enable = [counter-name|module_name|pattern|all];

  • innodb_monitor_disable: Отключает счетчики. 

    SET GLOBAL innodb_monitor_disable = [counter-name|module_name|pattern|all];

  • innodb_monitor_reset: Сбрасывает значения счетчиков до нуля. 

    SET GLOBAL innodb_monitor_reset = [counter-name|module_name|pattern|all];

  • innodb_monitor_reset_all: Сбрасывает все значения счетчиков. Счетчик должен быть отключен перед использованием innodb_monitor_reset_all. 

    SET GLOBAL innodb_monitor_reset_all = [counter-name|module_name|pattern|all];

Счетчики и модули счетчиков также можно включить во время запуска сервера MySQL, используя файл конфигурации сервера. Например, чтобы включить модуль log, счетчики metadata_table_handles_opened и metadata_table_handles_closed, введите следующую строку в раздел [mysqld] файла конфигурации сервера MySQL. 

[mysqld]
innodb_monitor_enable = log,metadata_table_handles_opened,metadata_table_handles_closed

При включении нескольких счетчиков или модулей в файле конфигурации укажите переменную innodb_monitor_enable , за которой следуют имена счетчиков и модулей, разделенные запятыми, как показано выше. Только переменная innodb_monitor_enable может использоваться в файле конфигурации. Переменные innodb_monitor_disable и innodb_monitor_reset поддерживаются только в командной строке.

Примечание

Поскольку каждый счетчик добавляет определённую издержку во время выполнения, используйте счетчики с осторожностью на серверах в режиме работы, чтобы диагностировать конкретные проблемы или отслеживать определённую функциональность. Для более широкого использования счетчиков рекомендуется использовать тестовый или сервер разработки.

Счетчики

Список доступных счетчиков может изменяться. Воспользуйтесь запросом к таблице схемы информации INNODB_METRICS для получения счетчиков, доступных в вашей версии сервера MySQL.

Включенные по умолчанию счетчики соответствуют показанным в выводе SHOW ENGINE INNODB STATUS. Счетчики, показанные в выводе SHOW ENGINE INNODB STATUS, всегда включены на системном уровне, но могут быть отключены для таблицы INNODB_METRICS. Состояние счетчика не сохраняется. Если не настроено иначе, счетчики возвращаются к своему исходному состоянию включения или отключения при перезапуске сервера.

Если вы работаете с программами, которые могут быть затронуты добавлением или удалением счетчиков, рекомендуется ознакомиться с заметками о выпуске и запросить таблицу INNODB_METRICS, чтобы идентифицировать эти изменения в рамках процесса обновления. 

mysql> SELECT name, subsystem, status FROM INFORMATION_SCHEMA.INNODB_METRICS ORDER BY NAME;
+---------------------------------------------+---------------------+----------+
| name                                        | subsystem           | status   |
+---------------------------------------------+---------------------+----------+
| adaptive_hash_pages_added                   | adaptive_hash_index | disabled |
| adaptive_hash_pages_removed                 | adaptive_hash_index | disabled |
| adaptive_hash_rows_added                    | adaptive_hash_index | disabled |
| adaptive_hash_rows_deleted_no_hash_entry    | adaptive_hash_index | disabled |
| adaptive_hash_rows_removed                  | adaptive_hash_index | disabled |
| adaptive_hash_rows_updated                  | adaptive_hash_index | disabled |
| adaptive_hash_searches                      | adaptive_hash_index | enabled  |
| adaptive_hash_searches_btree                | adaptive_hash_index | enabled  |
| buffer_data_reads                           | buffer              | enabled  |
| buffer_data_written                         | buffer              | enabled  |
| buffer_flush_adaptive                       | buffer              | disabled |
| buffer_flush_adaptive_avg_pass              | buffer              | disabled |
| buffer_flush_adaptive_avg_time_est          | buffer              | disabled |
| buffer_flush_adaptive_avg_time_slot         | buffer              | disabled |
| buffer_flush_adaptive_avg_time_thread       | buffer              | disabled |
| buffer_flush_adaptive_pages                 | buffer              | disabled |
| buffer_flush_adaptive_total_pages           | buffer              | disabled |
| buffer_flush_avg_page_rate                  | buffer              | disabled |
| buffer_flush_avg_pass                       | buffer              | disabled |
| buffer_flush_avg_time                       | buffer              | disabled |
| buffer_flush_background                     | buffer              | disabled |
| buffer_flush_background_pages               | buffer              | disabled |
| buffer_flush_background_total_pages         | buffer              | disabled |
| buffer_flush_batches                        | buffer              | disabled |
| buffer_flush_batch_num_scan                 | buffer              | disabled |
| buffer_flush_batch_pages                    | buffer              | disabled |
| buffer_flush_batch_scanned                  | buffer              | disabled |
| buffer_flush_batch_scanned_per_call         | buffer              | disabled |
| buffer_flush_batch_total_pages              | buffer              | disabled |
| buffer_flush_lsn_avg_rate                   | buffer              | disabled |
| buffer_flush_neighbor                       | buffer              | disabled |
| buffer_flush_neighbor_pages                 | buffer              | disabled |
| buffer_flush_neighbor_total_pages           | buffer              | disabled |
| buffer_flush_n_to_flush_by_age              | buffer              | disabled |
| buffer_flush_n_to_flush_by_dirty_page       | buffer              | disabled |
| buffer_flush_n_to_flush_requested           | buffer              | disabled |
| buffer_flush_pct_for_dirty                  | buffer              | disabled |
| buffer_flush_pct_for_lsn                    | buffer              | disabled |
| buffer_flush_sync                           | buffer              | disabled |
| buffer_flush_sync_pages                     | buffer              | disabled |
| buffer_flush_sync_total_pages               | buffer              | disabled |
| buffer_flush_sync_waits                     | buffer              | disabled |
| buffer_LRU_batches_evict                    | buffer              | disabled |
| buffer_LRU_batches_flush                    | buffer              | disabled |
| buffer_LRU_batch_evict_pages                | buffer              | disabled |
| buffer_LRU_batch_evict_total_pages          | buffer              | disabled |
| buffer_LRU_batch_flush_avg_pass             | buffer              | disabled |
| buffer_LRU_batch_flush_avg_time_est         | buffer              | disabled |
| buffer_LRU_batch_flush_avg_time_slot        | buffer              | disabled |
| buffer_LRU_batch_flush_avg_time_thread      | buffer              | disabled |
| buffer_LRU_batch_flush_pages                | buffer              | disabled |
| buffer_LRU_batch_flush_total_pages          | buffer              | disabled |
| buffer_LRU_batch_num_scan                   | buffer              | disabled |
| buffer_LRU_batch_scanned                    | buffer              | disabled |
| buffer_LRU_batch_scanned_per_call           | buffer              | disabled |
| buffer_LRU_get_free_loops                   | buffer              | disabled |
| buffer_LRU_get_free_search                  | Buffer              | disabled |
| buffer_LRU_get_free_waits                   | buffer              | disabled |
| buffer_LRU_search_num_scan                  | buffer              | disabled |
| buffer_LRU_search_scanned                   | buffer              | disabled |
| buffer_LRU_search_scanned_per_call          | buffer              | disabled |
| buffer_LRU_single_flush_failure_count       | Buffer              | disabled |
| buffer_LRU_single_flush_num_scan            | buffer              | disabled |
| buffer_LRU_single_flush_scanned             | buffer              | disabled |
| buffer_LRU_single_flush_scanned_per_call    | buffer              | disabled |
| buffer_LRU_unzip_search_num_scan            | buffer              | disabled |
| buffer_LRU_unzip_search_scanned             | buffer              | disabled |
| buffer_LRU_unzip_search_scanned_per_call    | buffer              | disabled |
| buffer_pages_created                        | buffer              | enabled  |
| buffer_pages_read                           | buffer              | enabled  |
| buffer_pages_written                        | buffer              | enabled  |
| buffer_page_read_blob                       | buffer_page_io      | disabled |
| buffer_page_read_fsp_hdr                    | buffer_page_io      | disabled |
| buffer_page_read_ibuf_bitmap                | buffer_page_io      | disabled |
| buffer_page_read_ibuf_free_list             | buffer_page_io      | disabled |
| buffer_page_read_index_ibuf_leaf            | buffer_page_io      | disabled |
| buffer_page_read_index_ibuf_non_leaf        | buffer_page_io      | disabled |
| buffer_page_read_index_inode                | buffer_page_io      | disabled |
| buffer_page_read_index_leaf                 | buffer_page_io      | disabled |
| buffer_page_read_index_non_leaf             | buffer_page_io      | disabled |
| buffer_page_read_other                      | buffer_page_io      | disabled |
| buffer_page_read_rseg_array                 | buffer_page_io      | disabled |
| buffer_page_read_system_page                | buffer_page_io      | disabled |
| buffer_page_read_trx_system                 | buffer_page_io      | disabled |
| buffer_page_read_undo_log                   | buffer_page_io      | disabled |
| buffer_page_read_xdes                       | buffer_page_io      | disabled |
| buffer_page_read_zblob                      | buffer_page_io      | disabled |
| buffer_page_read_zblob2                     | buffer_page_io      | disabled |
| buffer_page_written_blob                    | buffer_page_io      | disabled |
| buffer_page_written_fsp_hdr                 | buffer_page_io      | disabled |
| buffer_page_written_ibuf_bitmap             | buffer_page_io      | disabled |
| buffer_page_written_ibuf_free_list          | buffer_page_io      | disabled |
| buffer_page_written_index_ibuf_leaf         | buffer_page_io      | disabled |
| buffer_page_written_index_ibuf_non_leaf     | buffer_page_io      | disabled |
| buffer_page_written_index_inode             | buffer_page_io      | disabled |
| buffer_page_written_index_leaf              | buffer_page_io      | disabled |
| buffer_page_written_index_non_leaf          | buffer_page_io      | disabled |
| buffer_page_written_on_log_no_waits         | buffer_page_io      | disabled |
| buffer_page_written_on_log_waits            | buffer_page_io      | disabled |
| buffer_page_written_on_log_wait_loops       | buffer_page_io      | disabled |
| buffer_page_written_other                   | buffer_page_io      | disabled |
| buffer_page_written_rseg_array              | buffer_page_io      | disabled |
| buffer_page_written_system_page             | buffer_page_io      | disabled |
| buffer_page_written_trx_system              | buffer_page_io      | disabled |
| buffer_page_written_undo_log                | buffer_page_io      | disabled |
| buffer_page_written_xdes                    | buffer_page_io      | disabled |
| buffer_page_written_zblob                   | buffer_page_io      | disabled |
| buffer_page_written_zblob2                  | buffer_page_io      | disabled |
| buffer_pool_bytes_data                      | buffer              | enabled  |
| buffer_pool_bytes_dirty                     | buffer              | enabled  |
| buffer_pool_pages_data                      | buffer              | enabled  |
| buffer_pool_pages_dirty                     | buffer              | enabled  |
| buffer_pool_pages_free                      | buffer              | enabled  |
| buffer_pool_pages_misc                      | buffer              | enabled  |
| buffer_pool_pages_total                     | buffer              | enabled  |
| buffer_pool_reads                           | buffer              | enabled  |
| buffer_pool_read_ahead                      | buffer              | enabled  |
| buffer_pool_read_ahead_evicted              | buffer              | enabled  |
| buffer_pool_read_requests                   | buffer              | enabled  |
| buffer_pool_size                            | server              | enabled  |
| buffer_pool_wait_free                       | buffer              | enabled  |
| buffer_pool_write_requests                  | buffer              | enabled  |
| compression_pad_decrements                  | compression         | disabled |
| compression_pad_increments                  | compression         | disabled |
| compress_pages_compressed                   | compression         | disabled |
| compress_pages_decompressed                 | compression         | disabled |
| cpu_n                                       | cpu                 | disabled |
| cpu_stime_abs                               | cpu                 | disabled |
| cpu_stime_pct                               | cpu                 | disabled |
| cpu_utime_abs                               | cpu                 | disabled |
| cpu_utime_pct                               | cpu                 | disabled |
| dblwr_async_requests                        | dblwr               | disabled |
| dblwr_flush_requests                        | dblwr               | disabled |
| dblwr_flush_wait_events                     | dblwr               | disabled |
| dblwr_sync_requests                         | dblwr               | disabled |
| ddl_background_drop_tables                  | ddl                 | disabled |
| ddl_log_file_alter_table                    | ddl                 | disabled |
| ddl_online_create_index                     | ddl                 | disabled |
| ddl_pending_alter_table                     | ddl                 | disabled |
| ddl_sort_file_alter_table                   | ddl                 | disabled |
| dml_deletes                                 | dml                 | enabled  |
| dml_inserts                                 | dml                 | enabled  |
| dml_reads                                   | dml                 | disabled |
| dml_system_deletes                          | dml                 | enabled  |
| dml_system_inserts                          | dml                 | enabled  |
| dml_system_reads                            | dml                 | enabled  |
| dml_system_updates                          | dml                 | enabled  |
| dml_updates                                 | dml                 | enabled  |
| file_num_open_files                         | file_system         | enabled  |
| ibuf_merges                                 | change_buffer       | enabled  |
| ibuf_merges_delete                          | change_buffer       | enabled  |
| ibuf_merges_delete_mark                     | change_buffer       | enabled  |
| ibuf_merges_discard_delete                  | change_buffer       | enabled  |
| ibuf_merges_discard_delete_mark             | change_buffer       | enabled  |
| ibuf_merges_discard_insert                  | change_buffer       | enabled  |
| ibuf_merges_insert                          | change_buffer       | enabled  |
| ibuf_size                                   | change_buffer       | enabled  |
| icp_attempts                                | icp                 | disabled |
| icp_match                                   | icp                 | disabled |
| icp_no_match                                | icp                 | disabled |
| icp_out_of_range                            | icp                 | disabled |
| index_page_discards                         | index               | disabled |
| index_page_merge_attempts                   | index               | disabled |
| index_page_merge_successful                 | index               | disabled |
| index_page_reorg_attempts                   | index               | disabled |
| index_page_reorg_successful                 | index               | disabled |
| index_page_splits                           | index               | disabled |
| innodb_activity_count                       | server              | enabled  |
| innodb_background_drop_table_usec           | server              | disabled |
| innodb_dblwr_pages_written                  | server              | enabled  |
| innodb_dblwr_writes                         | server              | enabled  |
| innodb_dict_lru_count                       | server              | disabled |
| innodb_dict_lru_usec                        | server              | disabled |
| innodb_ibuf_merge_usec                      | server              | disabled |
| innodb_master_active_loops                  | server              | disabled |
| innodb_master_idle_loops                    | server              | disabled |
| innodb_master_purge_usec                    | server              | disabled |
| innodb_master_thread_sleeps                 | server              | disabled |
| innodb_mem_validate_usec                    | server              | disabled |
| innodb_page_size                            | server              | enabled  |
| innodb_rwlock_sx_os_waits                   | server              | enabled  |
| innodb_rwlock_sx_spin_rounds                | server              | enabled  |
| innodb_rwlock_sx_spin_waits                 | server              | enabled  |
| innodb_rwlock_s_os_waits                    | server              | enabled  |
| innodb_rwlock_s_spin_rounds                 | server              | enabled  |
| innodb_rwlock_s_spin_waits                  | server              | enabled  |
| innodb_rwlock_x_os_waits                    | server              | enabled  |
| innodb_rwlock_x_spin_rounds                 | server              | enabled  |
| innodb_rwlock_x_spin_waits                  | server              | enabled  |
| lock_deadlocks                              | lock                | enabled  |
| lock_deadlock_false_positives               | lock                | enabled  |
| lock_deadlock_rounds                        | lock                | enabled  |
| lock_rec_grant_attempts                     | lock                | enabled  |
| lock_rec_locks                              | lock                | disabled |
| lock_rec_lock_created                       | lock                | disabled |
| lock_rec_lock_removed                       | lock                | disabled |
| lock_rec_lock_requests                      | lock                | disabled |
| lock_rec_lock_waits                         | lock                | disabled |
| lock_rec_release_attempts                   | lock                | enabled  |
| lock_row_lock_current_waits                 | lock                | enabled  |
| lock_row_lock_time                          | lock                | enabled  |
| lock_row_lock_time_avg                      | lock                | enabled  |
| lock_row_lock_time_max                      | lock                | enabled  |
| lock_row_lock_waits                         | lock                | enabled  |
| lock_schedule_refreshes                     | lock                | enabled  |
| lock_table_locks                            | lock                | disabled |
| lock_table_lock_created                     | lock                | disabled |
| lock_table_lock_removed                     | lock                | disabled |
| lock_table_lock_waits                       | lock                | disabled |
| lock_threads_waiting                        | lock                | enabled  |
| lock_timeouts                               | lock                | enabled  |
| log_checkpoints                             | log                 | disabled |
| log_concurrency_margin                      | log                 | disabled |
| log_flusher_no_waits                        | log                 | disabled |
| log_flusher_waits                           | log                 | disabled |
| log_flusher_wait_loops                      | log                 | disabled |
| log_flush_avg_time                          | log                 | disabled |
| log_flush_lsn_avg_rate                      | log                 | disabled |
| log_flush_max_time                          | log                 | disabled |
| log_flush_notifier_no_waits                 | log                 | disabled |
| log_flush_notifier_waits                    | log                 | disabled |
| log_flush_notifier_wait_loops               | log                 | disabled |
| log_flush_total_time                        | log                 | disabled |
| log_free_space                              | log                 | disabled |
| log_full_block_writes                       | log                 | disabled |
| log_lsn_archived                            | log                 | disabled |
| log_lsn_buf_dirty_pages_added               | log                 | disabled |
| log_lsn_buf_pool_oldest_approx              | log                 | disabled |
| log_lsn_buf_pool_oldest_lwm                 | log                 | disabled |
| log_lsn_checkpoint_age                      | log                 | disabled |
| log_lsn_current                             | log                 | disabled |
| log_lsn_last_checkpoint                     | log                 | disabled |
| log_lsn_last_flush                          | log                 | disabled |
| log_max_modified_age_async                  | log                 | disabled |
| log_max_modified_age_sync                   | log                 | disabled |
| log_next_file                               | log                 | disabled |
| log_on_buffer_space_no_waits                | log                 | disabled |
| log_on_buffer_space_waits                   | log                 | disabled |
| log_on_buffer_space_wait_loops              | log                 | disabled |
| log_on_file_space_no_waits                  | log                 | disabled |
| log_on_file_space_waits                     | log                 | disabled |
| log_on_file_space_wait_loops                | log                 | disabled |
| log_on_flush_no_waits                       | log                 | disabled |
| log_on_flush_waits                          | log                 | disabled |
| log_on_flush_wait_loops                     | log                 | disabled |
| log_on_recent_closed_wait_loops             | log                 | disabled |
| log_on_recent_written_wait_loops            | log                 | disabled |
| log_on_write_no_waits                       | log                 | disabled |
| log_on_write_waits                          | log                 | disabled |
| log_on_write_wait_loops                     | log                 | disabled |
| log_padded                                  | log                 | disabled |
| log_partial_block_writes                    | log                 | disabled |
| log_waits                                   | log                 | enabled  |
| log_writer_no_waits                         | log                 | disabled |
| log_writer_on_archiver_waits                | log                 | disabled |
| log_writer_on_file_space_waits              | log                 | disabled |
| log_writer_waits                            | log                 | disabled |
| log_writer_wait_loops                       | log                 | disabled |
| log_writes                                  | log                 | enabled  |
| log_write_notifier_no_waits                 | log                 | disabled |
| log_write_notifier_waits                    | log                 | disabled |
| log_write_notifier_wait_loops               | log                 | disabled |
| log_write_requests                          | log                 | enabled  |
| log_write_to_file_requests_interval         | log                 | disabled |
| metadata_table_handles_closed               | metadata            | disabled |
| metadata_table_handles_opened               | metadata            | disabled |
| metadata_table_reference_count              | metadata            | disabled |
| module_cpu                                  | cpu                 | disabled |
| module_dblwr                                | dblwr               | disabled |
| module_page_track                           | page_track          | disabled |
| os_data_fsyncs                              | os                  | enabled  |
| os_data_reads                               | os                  | enabled  |
| os_data_writes                              | os                  | enabled  |
| os_log_bytes_written                        | os                  | enabled  |
| os_log_fsyncs                               | os                  | enabled  |
| os_log_pending_fsyncs                       | os                  | enabled  |
| os_log_pending_writes                       | os                  | enabled  |
| os_pending_reads                            | os                  | disabled |
| os_pending_writes                           | os                  | disabled |
| page_track_checkpoint_partial_flush_request | page_track          | disabled |
| page_track_full_block_writes                | page_track          | disabled |
| page_track_partial_block_writes             | page_track          | disabled |
| page_track_resets                           | page_track          | disabled |
| purge_del_mark_records                      | purge               | disabled |
| purge_dml_delay_usec                        | purge               | disabled |
| purge_invoked                               | purge               | disabled |
| purge_resume_count                          | purge               | disabled |
| purge_stop_count                            | purge               | disabled |
| purge_truncate_history_count                | purge               | disabled |
| purge_truncate_history_usec                 | purge               | disabled |
| purge_undo_log_pages                        | purge               | disabled |
| purge_upd_exist_or_extern_records           | purge               | disabled |
| sampled_pages_read                          | sampling            | disabled |
| sampled_pages_skipped                       | sampling            | disabled |
| trx_active_transactions                     | transaction         | disabled |
| trx_allocations                             | transaction         | disabled |
| trx_commits_insert_update                   | transaction         | disabled |
| trx_nl_ro_commits                           | transaction         | disabled |
| trx_on_log_no_waits                         | transaction         | disabled |
| trx_on_log_waits                            | transaction         | disabled |
| trx_on_log_wait_loops                       | transaction         | disabled |
| trx_rollbacks                               | transaction         | disabled |
| trx_rollbacks_savepoint                     | transaction         | disabled |
| trx_rollback_active                         | transaction         | disabled |
| trx_ro_commits                              | transaction         | disabled |
| trx_rseg_current_size                       | transaction         | disabled |
| trx_rseg_history_len                        | transaction         | enabled  |
| trx_rw_commits                              | transaction         | disabled |
| trx_undo_slots_cached                       | transaction         | disabled |
| trx_undo_slots_used                         | transaction         | disabled |
| undo_truncate_count                         | undo                | disabled |
| undo_truncate_done_logging_count            | undo                | disabled |
| undo_truncate_start_logging_count           | undo                | disabled |
| undo_truncate_usec                          | undo                | disabled |
+---------------------------------------------+---------------------+----------+
314 rows in set (0.00 sec)

Модули счетчиков

Каждый счетчик связан с определенным модулем. Имена модулей можно использовать для включения, отключения или сброса всех счетчиков для конкретной подсистемы. Например, используйте module_dml для включения всех счетчиков, связанных с подсистемой dml. 

mysql> SET GLOBAL innodb_monitor_enable = module_dml;

mysql> SELECT name, subsystem, status FROM INFORMATION_SCHEMA.INNODB_METRICS
       WHERE subsystem ='dml';
+-------------+-----------+---------+
| name        | subsystem | status  |
+-------------+-----------+---------+
| dml_reads   | dml       | enabled |
| dml_inserts | dml       | enabled |
| dml_deletes | dml       | enabled |
| dml_updates | dml       | enabled |
+-------------+-----------+---------+

Имена модулей могут использоваться с innodb_monitor_enable и связанными переменными.

Ниже приведен список имён модулей и соответствующих имён SUBSYSTEM.

  • module_adaptive_hash (подсистема = adaptive_hash_index)

  • module_buffer (подсистема = buffer)

  • module_buffer_page (подсистема = buffer_page_io)

  • module_compress (подсистема = compression)

  • module_ddl (подсистема = ddl)

  • module_dml (подсистема = dml)

  • module_file (подсистема = file_system)

  • module_ibuf_system (подсистема = change_buffer)

  • module_icp (подсистема = icp)

  • module_index (подсистема = index)

  • module_innodb (подсистема = innodb)

  • module_lock (подсистема = lock)

  • module_log (подсистема = log)

  • module_metadata (подсистема = metadata)

  • module_os (подсистема = os)

  • module_purge (подсистема = purge)

  • module_trx (подсистема = transaction)

  • module_undo (подсистема = undo)

Пример 17.11 Работа со счетчиками таблицы INNODB_METRICS

Этот пример демонстрирует включение, отключение, сброс счетчика и запросы данных счетчика в таблице INNODB_METRICS.

  1. Создайте простую таблицу InnoDB: 

    mysql> USE test;
Database changed

mysql> CREATE TABLE t1 (c1 INT) ENGINE=INNODB;
Query OK, 0 rows affected (0.02 sec)

  2. Включите счетчик dml_inserts. 

    mysql> SET GLOBAL innodb_monitor_enable = dml_inserts;
Query OK, 0 rows affected (0.01 sec)

    Описание счетчика dml_inserts можно найти в столбце COMMENT таблицы INNODB_METRICS: 

    mysql> SELECT NAME, COMMENT FROM INFORMATION_SCHEMA.INNODB_METRICS WHERE NAME="dml_inserts";
+-------------+-------------------------+
| NAME        | COMMENT                 |
+-------------+-------------------------+
| dml_inserts | Number of rows inserted |
+-------------+-------------------------+

  3. Запросите данные счетчика dml_inserts из таблицы INNODB_METRICS. Так как операции DML не выполнялись, значения счетчика равны нулю или NULL. Значения TIME_ENABLED и TIME_ELAPSED указывают на время последнего включения счетчика и прошедшее с того времени количество секунд. 

    mysql>  SELECT * FROM INFORMATION_SCHEMA.INNODB_METRICS WHERE NAME="dml_inserts" \G
*************************** 1. row ***************************
           NAME: dml_inserts
      SUBSYSTEM: dml
          COUNT: 0
      MAX_COUNT: 0
      MIN_COUNT: NULL
      AVG_COUNT: 0
    COUNT_RESET: 0
MAX_COUNT_RESET: 0
MIN_COUNT_RESET: NULL
AVG_COUNT_RESET: NULL
   TIME_ENABLED: 2014-12-04 14:18:28
  TIME_DISABLED: NULL
   TIME_ELAPSED: 28
     TIME_RESET: NULL
         STATUS: enabled
           TYPE: status_counter
        COMMENT: Number of rows inserted

  4. Вставьте три строки данных в таблицу. 

    mysql> INSERT INTO t1 values(1);
Query OK, 1 row affected (0.00 sec)

mysql> INSERT INTO t1 values(2);
Query OK, 1 row affected (0.00 sec)

mysql> INSERT INTO t1 values(3);
Query OK, 1 row affected (0.00 sec)

  5. Еще раз запросите данные счетчика dml_inserts из таблицы INNODB_METRICS. Теперь несколько значений счетчиков увеличились, в том числе COUNT, MAX_COUNT, AVG_COUNT и COUNT_RESET. Обратитесь к определению таблицы INNODB_METRICS для получения описания этих значений. 

    mysql>  SELECT * FROM INFORMATION_SCHEMA.INNODB_METRICS WHERE NAME="dml_inserts"\G
*************************** 1. row ***************************
           NAME: dml_inserts
      SUBSYSTEM: dml
          COUNT: 3
      MAX_COUNT: 3
      MIN_COUNT: NULL
      AVG_COUNT: 0.046153846153846156
    COUNT_RESET: 3
MAX_COUNT_RESET: 3
MIN_COUNT_RESET: NULL
AVG_COUNT_RESET: NULL
   TIME_ENABLED: 2014-12-04 14:18:28
  TIME_DISABLED: NULL
   TIME_ELAPSED: 65
     TIME_RESET: NULL
         STATUS: enabled
           TYPE: status_counter
        COMMENT: Number of rows inserted

  6. Сбросьте счетчик dml_inserts и снова запросите данные счетчика dml_inserts из таблицы INNODB_METRICS. Значения %_RESET, которые были сообщены ранее, такие как COUNT_RESET и MAX_RESET, сброшены до нуля. Значения, такие как COUNT, MAX_COUNT и AVG_COUNT, которые кумулируют данные с момента включения счетчика, не затрагиваются сбросом. 

    mysql> SET GLOBAL innodb_monitor_reset = dml_inserts;
Query OK, 0 rows affected (0.00 sec)

mysql> SELECT * FROM INFORMATION_SCHEMA.INNODB_METRICS WHERE NAME="dml_inserts"\G
*************************** 1. row ***************************
           NAME: dml_inserts
      SUBSYSTEM: dml
          COUNT: 3
      MAX_COUNT: 3
      MIN_COUNT: NULL
      AVG_COUNT: 0.03529411764705882
    COUNT_RESET: 0
MAX_COUNT_RESET: 0
MIN_COUNT_RESET: NULL
AVG_COUNT_RESET: 0
   TIME_ENABLED: 2014-12-04 14:18:28
  TIME_DISABLED: NULL
   TIME_ELAPSED: 85
     TIME_RESET: 2014-12-04 14:19:44
         STATUS: enabled
           TYPE: status_counter
        COMMENT: Number of rows inserted

  7. Для сброса всех значений счетчиков необходимо сначала отключить счетчик. Отключение счетчика устанавливает значение STATUS в disabled. 

    mysql> SET GLOBAL innodb_monitor_disable = dml_inserts;
Query OK, 0 rows affected (0.00 sec)

mysql> SELECT * FROM INFORMATION_SCHEMA.INNODB_METRICS WHERE NAME="dml_inserts"\G
*************************** 1. row ***************************
           NAME: dml_inserts
      SUBSYSTEM: dml
          COUNT: 3
      MAX_COUNT: 3
      MIN_COUNT: NULL
      AVG_COUNT: 0.030612244897959183
    COUNT_RESET: 0
MAX_COUNT_RESET: 0
MIN_COUNT_RESET: NULL
AVG_COUNT_RESET: 0
   TIME_ENABLED: 2014-12-04 14:18:28
  TIME_DISABLED: 2014-12-04 14:20:06
   TIME_ELAPSED: 98
     TIME_RESET: NULL
         STATUS: disabled
           TYPE: status_counter
        COMMENT: Number of rows inserted
    Примечание

    Поддерживается сопоставление с подстановочными символами для имён счетчиков и модулей. Например, вместо указания полного имени счетчика dml_inserts можно указать dml_i%. Также можно включать, отключать или сбрасывать несколько счетчиков или модулей одновременно, используя сопоставление с подстановочными символами. Например, укажите dml_%, чтобы включить, отключить или сбросить все счетчики, начинающиеся с dml_.

  8. После отключения счетчика можно сбросить все значения счетчиков, используя опцию innodb_monitor_reset_all. Все значения устанавливаются в ноль или NULL. 

    mysql> SET GLOBAL innodb_monitor_reset_all = dml_inserts;
Query OK, 0 rows affected (0.00 sec)

mysql> SELECT * FROM INFORMATION_SCHEMA.INNODB_METRICS WHERE NAME="dml_inserts"\G
*************************** 1. row ***************************
           NAME: dml_inserts
      SUBSYSTEM: dml
          COUNT: 0
      MAX_COUNT: NULL
      MIN_COUNT: NULL
      AVG_COUNT: NULL
    COUNT_RESET: 0
MAX_COUNT_RESET: NULL
MIN_COUNT_RESET: NULL
AVG_COUNT_RESET: NULL
   TIME_ENABLED: NULL
  TIME_DISABLED: NULL
   TIME_ELAPSED: NULL
     TIME_RESET: NULL
         STATUS: disabled
           TYPE: status_counter
        COMMENT: Number of rows inserted

© 2025 Oracle
Licensed under the GPLv2 License.
https://docs.oracle.com/cd/E17952_01/mysql-9.2-en/innodb-information-schema-metrics-table.html

Spec-Zone.ru

Настройки Оффлайн Что нового Помощь О нас
Spec-Zone .ru
спецификации, руководства, описания, API