[MySQL] Information Schema - InnoDB 메트릭 테이블

INNODB_METRICS 테이블

INNODB_METRICS 테이블은 InnoDB 성능 리소스 관련 카운터에 대한 정보를 제공합니다.

INNODB_METRICS 테이블 컬럼은 다음과 같습니다.

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

 

 

■ 카운터 활성화, 비활성화 재설정

다음 변수를 사용하여 카운터를 활성화, 비활성화 재설정 있습니다.

+ innodb_monitor_enable: 카운터 활성화
SET GLOBAL innodb_monitor_enable = [counter-name|module_name|pattern|all];

+ innodb_monitor_disable: 카운터 비활성화
SET GLOBAL innodb_monitor_disable = [counter-name|module_name|pattern|all];

+ innodb_monitor_reset: 카운터를 0으로 재설정
SET GLOBAL innodb_monitor_reset = [counter-name|module_name|pattern|all];

+ innodb_monitor_reset_all: 모든 카운터 값을 재설정합니다. innodb_monitor_reset_all을 사용하기 전에 카운터를 비활성화해야합니다.
SET GLOBAL innodb_monitor_reset_all = [counter-name|module_name|pattern|all];

 

카운터 카운터 모듈은 MySQL 서버 구성 파일을 사용하여 시작할 활성화 수도 있습니다. 예를 들어, 로그 모듈 metadata_table_handles_opened metadata_table_handles_closed 카운터를 활성화하려면 MySQL 서버 구성 파일의 [mysqld] 섹션에 다음 줄을 입력합니다.

[mysqld]
innodb_monitor_enable = module_recovery,metadata_table_handles_opened,metadata_table_handles_closed

 

구성 파일에서 여러 카운터 또는 모듈을 활성화할때, 위와 같이 innodb_monitor_enable 변수 뒤에 카운터 모듈 이름을 쉼표로 구분하여 지정합니다. 구성 파일에는 innodb_monitor_enable 변수만 사용할 있습니다. innodb_monitor_disable innodb_monitor_reset 변수는 명령 줄에서만 지원됩니다.

 

참고사항

카운터는 어느 정도의 런타임 오버 헤드를 추가하므로 프로덕션 서버에서 카운터를 보수적으로 사용하여 특정 문제를 진단하거나 특정 기능을 모니터링합니다. 카운터를보다 광범위하게 사용하려면 테스트 또는 개발 서버를 사용하는 것이 좋습니다.

 

■ 카운터

사용 가능한 카운터 목록은 변경될 있습니다. MySQL 서버 버전에서 사용할 수있는 카운터에 대한 INFORMATION_SCHEMA.INNODB_METRICS 테이블을 쿼리합니다.

 

기본적으로 활성화된 카운터는 SHOW ENGINE INNODB STATUS 출력에 표시된 것과 일치합니다. SHOW ENGINE INNODB STATUS 출력에 표시된 카운터는 항상 시스템 수준에서 활성화되지만 INNODB_METRICS 테이블에 대해서는 비활성화 있습니다. 카운터 상태가 지속되지 않습니다. 별도로 구성하지 않는 카운터는 서버가 다시 시작될때 기본 활성화 또는 비활성화 상태로 되돌아갑니다.

 

카운터 추가 또는 제거의 영향을받는 프로그램을 실행하는 경우 릴리스 정보를 검토하고 INNODB_METRICS 테이블을 쿼리하여 업그레이드 프로세스의 일부로 이러한 변경 사항을 식별하는 것이 좋습니다.

 

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_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_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_other                | 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 |
| ddl_background_drop_indexes              | ddl                 | 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_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_checkpoint_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_log_flush_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_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_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_table_locks                         | lock                | disabled |
| lock_table_lock_created                  | lock                | disabled |
| lock_table_lock_removed                  | lock                | disabled |
| lock_table_lock_waits                    | lock                | disabled |
| lock_timeouts                            | lock                | enabled  |
| log_checkpoints                          | recovery            | disabled |
| log_lsn_buf_pool_oldest                  | recovery            | disabled |
| log_lsn_checkpoint_age                   | recovery            | disabled |
| log_lsn_current                          | recovery            | disabled |
| log_lsn_last_checkpoint                  | recovery            | disabled |
| log_lsn_last_flush                       | recovery            | disabled |
| log_max_modified_age_async               | recovery            | disabled |
| log_max_modified_age_sync                | recovery            | disabled |
| log_num_log_io                           | recovery            | disabled |
| log_padded                               | recovery            | enabled  |
| log_pending_checkpoint_writes            | recovery            | disabled |
| log_pending_log_flushes                  | recovery            | disabled |
| log_waits                                | recovery            | enabled  |
| log_writes                               | recovery            | enabled  |
| log_write_requests                       | recovery            | enabled  |
| metadata_table_handles_closed            | metadata            | disabled |
| metadata_table_handles_opened            | metadata            | disabled |
| metadata_table_reference_count           | metadata            | 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 |
| 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_undo_log_pages                     | purge               | disabled |
| purge_upd_exist_or_extern_records        | purge               | disabled |
| trx_active_transactions                  | transaction         | disabled |
| trx_commits_insert_update                | transaction         | disabled |
| trx_nl_ro_commits                        | 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 |
+------------------------------------------+---------------------+----------+
235 rows in set (0.01 sec)

 

▶︎ 카운터 모듈

카운터는 특정 모듈과 연결됩니다. 모듈 이름을 사용하여 특정 하위 시스템에 대한 모든 카운터를 활성화, 비활성화 또는 재설정 있습니다. 예를 들어 module_dml 사용하여 dml 하위 시스템과 연결된 모든 카운터를 활성화합니다.

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 |
+-------------+-----------+---------+

 

모듈 이름은 innodb_monitor_enable 관련 변수와 함께 사용할 있습니다.

모듈 이름과 해당 SUBSYSTEM 이름이 아래에 나열되어 있습니다.

+ module_adaptive_hash (subsystem = adaptive_hash_index)
+ module_buffer (subsystem = buffer)
+ module_buffer_page (subsystem = buffer_page_io)
+ module_compress (subsystem = compression)
+ module_ddl (subsystem = ddl)
+ module_dml (subsystem = dml)
+ module_file (subsystem = file_system)
+ module_ibuf_system (subsystem = change_buffer)
+ module_icp (subsystem = icp)
+ module_index (subsystem = index)
+ module_innodb (subsystem = innodb)
+ module_lock (subsystem = lock)
+ module_log (subsystem = recovery)
+ module_metadata (subsystem = metadata)
+ module_os (subsystem = os)
+ module_purge (subsystem = purge)
+ module_trx (subsystem = transaction)

 

• 예제 1 : Working with INNODB_METRICS Table Counters

예는 카운터를 활성화, 비활성화 재설정하고 INNODB_METRICS 테이블에서 카운터 데이터를 쿼리하는 방법을 보여줍니다.

 

1. 간단한 InnoDB 테이블을 만듭니다.

mysql> USE test;
Database changed

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

 

2. dml_inserts 카운터를 활성화 합니다.

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

 

dml_inserts 카운터에 대한 설명은 INNODB_METRICS 테이블의 COMMENT 컬럼에서 찾을 있습니다.

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

 

3. INNODB_METRICS 테이블에서 dml_inserts 카운터 데이터를 쿼리합니다. DML 작업이 수행되지 않았기 때문에 카운터 값은 0 또는 NULL입니다. TIME_ENABLED TIME_ELAPSED 값은 카운터가 마지막으로 활성화 된시기와 이후로 경과 시간 () 나타냅니다.

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. 테이블에 데이터를 3줄정도 입력합니다.

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. INNODB_METRICS 테이블에서 dml_inserts 카운터 데이터를 다시 쿼리합니다. 이제 COUNT, MAX_COUNT, AVG_COUNT COUNT_RESET 포함하여 많은 카운터 값이 증가했습니다. 이러한 값에 대한 설명은 INNODB_METRICS 테이블 정의를 참조합니다.

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. dml_inserts 카운터를 재설정하고 INNODB_METRICS 테이블에서 dml_inserts 카운터 데이터를 다시 쿼리합니다. 이전에 보고된 %_RESET ( : COUNT_RESET MAX_RESET) 다시 0으로 설정됩니다. 카운터가 활성화 시점부터 데이터를 누적 수집하는 COUNT, MAX_COUNT AVG_COUNT 같은 값은 재설정의 영향을 받지 않습니다.

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. 모든 카운터 값을 재설정하려면 먼저 카운터를 비활성화해야합니다. 카운터를 비활성화하면 STATUS 값이 비활성화로 설정됩니다.

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

 

+ 참고사항

카운터 모듈 이름에 대해 와일드 카드 일치가 지원됩니다. 예를 들어 전체 dml_inserts 카운터 이름을 지정하는 대신 dml_i% 지정할 있습니다. 와일드 카드 일치를 사용하여 번에 여러 카운터 또는 모듈을 활성화, 비활성화 또는 재설정 수도 있습니다. 예를 들어 dml_ 시작하는 모든 카운터를 활성화, 비활성화 또는 재설정하려면 dml_% 지정합니다.

 

8. 카운터가 비활성화 innodb_monitor_reset_all 옵션을 사용하여 모든 카운터 값을 재설정 있습니다. 모든 값은 0 또는 NULL로 설정됩니다.

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