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15.14.6 InnoDB INFORMATION_SCHEMA Metrics Table

Table des matières

The INNODB_METRICS table provides information about InnoDB performance and resource-related counters.

INNODB_METRICS table columns are shown below. For column descriptions, see Section 25.38.22, “The INFORMATION_SCHEMA INNODB_METRICS Table”.

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

Enabling, Disabling, and Resetting Counters

You can enable, disable, and reset counters using the following variables:

innodb_monitor_enable: Enables counters.
1. SET GLOBAL innodb_monitor_enable = [counter-name|module_name|pattern|all];
innodb_monitor_disable: Disables counters.
1. SET GLOBAL innodb_monitor_disable = [counter-name|module_name|pattern|all];
innodb_monitor_reset: Resets counter values to zero.
1. SET GLOBAL innodb_monitor_reset = [counter-name|module_name|pattern|all];
innodb_monitor_reset_all: Resets all counter values. A counter must be disabled before using innodb_monitor_reset_all.
1. SET GLOBAL innodb_monitor_reset_all = [counter-name|module_name|pattern|all];

Counters and counter modules can also be enabled at startup using the MySQL server configuration file. For example, to enable the log module, metadata_table_handles_opened and metadata_table_handles_closed counters, enter the following line in the [mysqld] section of the MySQL server configuration file.

[mysqld]
innodb_monitor_enable = module_recovery,metadata_table_handles_opened,metadata_table_handles_closed

When enabling multiple counters or modules in a configuration file, specify the innodb_monitor_enable variable followed by counter and module names separated by a comma, as shown above. Only the innodb_monitor_enable variable can be used in a configuration file. The innodb_monitor_disable and innodb_monitor_reset variables are supported on the command line only.

Note

Because each counter adds a degree of runtime overhead, use counters conservatively on production servers to diagnose specific issues or monitor specific functionality. A test or development server is recommended for more extensive use of counters.

Counters

The list of available counters is subject to change. Query the INFORMATION_SCHEMA.INNODB_METRICS table for counters available in your MySQL server version.

The counters enabled by default correspond to those shown in SHOW ENGINE INNODB STATUS output. Counters shown in SHOW ENGINE INNODB STATUS output are always enabled at a system level but can be disable for the INNODB_METRICS table. Counter status is not persistent. Unless configured otherwise, counters revert to their default enabled or disabled status when the server is restarted.

If you run programs that would be affected by the addition or removal of counters, it is recommended that you review the releases notes and query the INNODB_METRICS table to identify those changes as part of your upgrade process.

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)

Counter Modules

Each counter is associated with a particular module. Module names can be used to enable, disable, or reset all counters for a particular subsystem. For example, use module_dml to enable all counters associated with the dml subsystem.

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

Module names can be used with innodb_monitor_enable and related variables.

Module names and corresponding SUBSYSTEM names are listed below.

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)
module_undo (subsystem = undo)

Example 15.11 Working with INNODB_METRICS Table Counters

This example demonstrates enabling, disabling, and resetting a counter, and querying counter data in the INNODB_METRICS table.

Create a simple InnoDB table:
1. mysql> USE test;
2. Database changed
4. mysql> CREATE TABLE t1 (c1 INT) ENGINE=INNODB;
5. Query OK, 0 rows affected (0.02 sec)
Enable the dml_inserts counter.
1. mysql> SET GLOBAL innodb_monitor_enable = dml_inserts;
2. Query OK, 0 rows affected (0.01 sec)
A description of the dml_inserts counter can be found in the COMMENT column of the INNODB_METRICS table:
1. mysql> SELECT NAME, COMMENT FROM INFORMATION_SCHEMA.INNODB_METRICS WHERE NAME="dml_inserts";
2. +-------------+-------------------------+
3. | NAME | COMMENT |
4. +-------------+-------------------------+
5. | dml_inserts | Number of rows inserted |
6. +-------------+-------------------------+
Query the INNODB_METRICS table for the dml_inserts counter data. Because no DML operations have been performed, the counter values are zero or NULL. The TIME_ENABLED and TIME_ELAPSED values indicate when the counter was last enabled and how many seconds have elapsed since that time.
1. mysql> SELECT * FROM INFORMATION_SCHEMA.INNODB_METRICS WHERE NAME="dml_inserts" \G
2. *************************** 1. row ***************************
3. NAME: dml_inserts
4. SUBSYSTEM: dml
5. COUNT: 0
6. MAX_COUNT: 0
7. MIN_COUNT: NULL
8. AVG_COUNT: 0
9. COUNT_RESET: 0
10. MAX_COUNT_RESET: 0
11. MIN_COUNT_RESET: NULL
12. AVG_COUNT_RESET: NULL
13. TIME_ENABLED: 2014-12-04 14:18:28
14. TIME_DISABLED: NULL
15. TIME_ELAPSED: 28
16. TIME_RESET: NULL
17. STATUS: enabled
18. TYPE: status_counter
19. COMMENT: Number of rows inserted
Insert three rows of data into the table.
1. mysql> INSERT INTO t1 values(1);
2. Query OK, 1 row affected (0.00 sec)
4. mysql> INSERT INTO t1 values(2);
5. Query OK, 1 row affected (0.00 sec)
7. mysql> INSERT INTO t1 values(3);
8. Query OK, 1 row affected (0.00 sec)
Query the INNODB_METRICS table again for the dml_inserts counter data. A number of counter values have now incremented including COUNT, MAX_COUNT, AVG_COUNT, and COUNT_RESET. Refer to the INNODB_METRICS table definition for descriptions of these values.
1. mysql> SELECT * FROM INFORMATION_SCHEMA.INNODB_METRICS WHERE NAME="dml_inserts"\G
2. *************************** 1. row ***************************
3. NAME: dml_inserts
4. SUBSYSTEM: dml
5. COUNT: 3
6. MAX_COUNT: 3
7. MIN_COUNT: NULL
8. AVG_COUNT: 0.046153846153846156
9. COUNT_RESET: 3
10. MAX_COUNT_RESET: 3
11. MIN_COUNT_RESET: NULL
12. AVG_COUNT_RESET: NULL
13. TIME_ENABLED: 2014-12-04 14:18:28
14. TIME_DISABLED: NULL
15. TIME_ELAPSED: 65
16. TIME_RESET: NULL
17. STATUS: enabled
18. TYPE: status_counter
19. COMMENT: Number of rows inserted
Reset the dml_inserts counter and query the INNODB_METRICS table again for the dml_inserts counter data. The %_RESET values that were reported previously, such as COUNT_RESET and MAX_RESET, are set back to zero. Values such as COUNT, MAX_COUNT, and AVG_COUNT, which cumulatively collect data from the time the counter is enabled, are unaffected by the reset.
1. mysql> SET GLOBAL innodb_monitor_reset = dml_inserts;
2. Query OK, 0 rows affected (0.00 sec)
4. mysql> SELECT * FROM INFORMATION_SCHEMA.INNODB_METRICS WHERE NAME="dml_inserts"\G
5. *************************** 1. row ***************************
6. NAME: dml_inserts
7. SUBSYSTEM: dml
8. COUNT: 3
9. MAX_COUNT: 3
10. MIN_COUNT: NULL
11. AVG_COUNT: 0.03529411764705882
12. COUNT_RESET: 0
13. MAX_COUNT_RESET: 0
14. MIN_COUNT_RESET: NULL
15. AVG_COUNT_RESET: 0
16. TIME_ENABLED: 2014-12-04 14:18:28
17. TIME_DISABLED: NULL
18. TIME_ELAPSED: 85
19. TIME_RESET: 2014-12-04 14:19:44
20. STATUS: enabled
21. TYPE: status_counter
22. COMMENT: Number of rows inserted
To reset all counter values, you must first disable the counter. Disabling the counter sets the STATUS value to disabled.
1. mysql> SET GLOBAL innodb_monitor_disable = dml_inserts;
2. Query OK, 0 rows affected (0.00 sec)
4. mysql> SELECT * FROM INFORMATION_SCHEMA.INNODB_METRICS WHERE NAME="dml_inserts"\G
5. *************************** 1. row ***************************
6. NAME: dml_inserts
7. SUBSYSTEM: dml
8. COUNT: 3
9. MAX_COUNT: 3
10. MIN_COUNT: NULL
11. AVG_COUNT: 0.030612244897959183
12. COUNT_RESET: 0
13. MAX_COUNT_RESET: 0
14. MIN_COUNT_RESET: NULL
15. AVG_COUNT_RESET: 0
16. TIME_ENABLED: 2014-12-04 14:18:28
17. TIME_DISABLED: 2014-12-04 14:20:06
18. TIME_ELAPSED: 98
19. TIME_RESET: NULL
20. STATUS: disabled
21. TYPE: status_counter
22. COMMENT: Number of rows inserted
Note

Wildcard match is supported for counter and module names. For example, instead of specifying the full dml_inserts counter name, you can specify dml_i%. You can also enable, disable, or reset multiple counters or modules at once using a wildcard match. For example, specify dml_% to enable, disable, or reset all counters that begin with dml_.
After the counter is disabled, you can reset all counter values using the innodb_monitor_reset_all option. All values are set to zero or NULL.
1. mysql> SET GLOBAL innodb_monitor_reset_all = dml_inserts;
2. Query OK, 0 rows affected (0.00 sec)
4. mysql> SELECT * FROM INFORMATION_SCHEMA.INNODB_METRICS WHERE NAME="dml_inserts"\G
5. *************************** 1. row ***************************
6. NAME: dml_inserts
7. SUBSYSTEM: dml
8. COUNT: 0
9. MAX_COUNT: NULL
10. MIN_COUNT: NULL
11. AVG_COUNT: NULL
12. COUNT_RESET: 0
13. MAX_COUNT_RESET: NULL
14. MIN_COUNT_RESET: NULL
15. AVG_COUNT_RESET: NULL
16. TIME_ENABLED: NULL
17. TIME_DISABLED: NULL
18. TIME_ELAPSED: NULL
19. TIME_RESET: NULL
20. STATUS: disabled
21. TYPE: status_counter
22. COMMENT: Number of rows inserted

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15.14.6 InnoDB INFORMATION_SCHEMA Metrics Table

Enabling, Disabling, and Resetting Counters

Counters

Counter Modules

Références

Paramètres du site

Fonctions utilisateur×

15.14.6 InnoDB INFORMATION_SCHEMA Metrics Table

Enabling, Disabling, and Resetting Counters

Counters

Counter Modules

Références

Dans ce chapitre

Etiquettes

Statistiques