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  1. MariaDB Server
  2. MDEV-32590

Opened_table_definitions is counted wrong

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Details

    • Bug
    • Status: Confirmed (View Workflow)
    • Minor
    • Resolution: Unresolved
    • 10.4(EOL), 10.5, 10.6, 10.7(EOL), 10.8(EOL), 10.9(EOL), 10.10(EOL), 10.11, 11.0(EOL), 11.1(EOL), 11.2(EOL), 11.3(EOL)
    • 10.11
    • Information Schema
    • Linux n.a.

    Description

      Opened_table_definitions server status is not counted correctly. It should NEVER be smaller than Open_table_definitions. But is is. This means some table definion opens are not counted correctly. It concerns at least sys schema tables (views):

      SQL> SHOW  GLOBAL STATUS LIKE 'open%table%';
      +--------------------------+-------+
      | Variable_name            | Value |
      +--------------------------+-------+
      | Open_table_definitions   | 164   |
      | Opened_table_definitions | 62    | -> 102 missing -> sys tables!
      +--------------------------+-------+
       
      SQL> > SHOW OPEN TABLES;
      +----------+-----------------------------------------------+--------+-------------+
      | Database | Table                                         | In_use | Name_locked |
      +----------+-----------------------------------------------+--------+-------------+
      | sys      | x$user_summary_by_statement_latency           |      0 |           0 |
      | sys      | schema_table_lock_waits                       |      0 |           0 |
      | sys      | x$host_summary_by_statement_latency           |      0 |           0 |
      | sys      | x$ps_digest_95th_percentile_by_avg_us         |      0 |           0 |
      | sys      | memory_global_total                           |      0 |           0 |
      | sys      | x$user_summary                                |      0 |           0 |
      | sys      | x$host_summary                                |      0 |           0 |
      | sys      | schema_object_overview                        |      0 |           0 |
      | sys      | statement_analysis                            |      0 |           0 |
      | sys      | session_ssl_status                            |      0 |           0 |
      | sys      | waits_by_user_by_latency                      |      0 |           0 |
      | sys      | waits_by_host_by_latency                      |      0 |           0 |
      | sys      | innodb_buffer_stats_by_table                  |      0 |           0 |
      | sys      | memory_global_by_current_bytes                |      0 |           0 |
      | sys      | ps_check_lost_instrumentation                 |      0 |           0 |
      | sys      | schema_table_statistics_with_buffer           |      0 |           0 |
      | sys      | processlist                                   |      0 |           0 |
      | sys      | sys_config                                    |      0 |           0 |
      | sys      | host_summary_by_stages                        |      0 |           0 |
      | sys      | user_summary_by_stages                        |      0 |           0 |
      | sys      | x$wait_classes_global_by_latency              |      0 |           0 |
      | sys      | x$memory_global_by_current_bytes              |      0 |           0 |
      | sys      | x$user_summary_by_file_io                     |      0 |           0 |
      | sys      | x$host_summary_by_file_io                     |      0 |           0 |
      | sys      | x$ps_digest_avg_latency_distribution          |      0 |           0 |
      | sys      | statements_with_sorting                       |      0 |           0 |
      | sys      | schema_unused_indexes                         |      0 |           0 |
      | sys      | x$statements_with_temp_tables                 |      0 |           0 |
      | sys      | x$innodb_buffer_stats_by_schema               |      0 |           0 |
      | sys      | statements_with_runtimes_in_95th_percentile   |      0 |           0 |
      | sys      | io_global_by_file_by_bytes                    |      0 |           0 |
      | sys      | x$session                                     |      0 |           0 |
      | sys      | io_global_by_wait_by_bytes                    |      0 |           0 |
      | sys      | x$wait_classes_global_by_avg_latency          |      0 |           0 |
      | sys      | host_summary_by_statement_type                |      0 |           0 |
      | sys      | user_summary_by_statement_type                |      0 |           0 |
      | sys      | x$user_summary_by_file_io_type                |      0 |           0 |
      | sys      | x$host_summary_by_file_io_type                |      0 |           0 |
      | sys      | latest_file_io                                |      0 |           0 |
      | sys      | x$statements_with_full_table_scans            |      0 |           0 |
      | sys      | io_global_by_wait_by_latency                  |      0 |           0 |
      | sys      | statements_with_errors_or_warnings            |      0 |           0 |
      | sys      | io_global_by_file_by_latency                  |      0 |           0 |
      | sys      | schema_table_statistics                       |      0 |           0 |
      | sys      | statements_with_temp_tables                   |      0 |           0 |
      | sys      | x$memory_by_thread_by_current_bytes           |      0 |           0 |
      | sys      | x$statements_with_runtimes_in_95th_percentile |      0 |           0 |
      | sys      | x$statement_analysis                          |      0 |           0 |
      | sys      | wait_classes_global_by_avg_latency            |      0 |           0 |
      | sys      | user_summary_by_file_io_type                  |      0 |           0 |
      | sys      | host_summary_by_file_io_type                  |      0 |           0 |
      | sys      | x$processlist                                 |      0 |           0 |
      | sys      | statements_with_full_table_scans              |      0 |           0 |
      | sys      | x$waits_by_user_by_latency                    |      0 |           0 |
      | sys      | x$waits_by_host_by_latency                    |      0 |           0 |
      | sys      | host_summary                                  |      0 |           0 |
      | sys      | user_summary                                  |      0 |           0 |
      | sys      | x$io_global_by_wait_by_bytes                  |      0 |           0 |
      | sys      | version                                       |      0 |           0 |
      | sys      | x$statements_with_errors_or_warnings          |      0 |           0 |
      | sys      | x$io_global_by_file_by_bytes                  |      0 |           0 |
      | sys      | x$latest_file_io                              |      0 |           0 |
      | sys      | x$innodb_buffer_stats_by_table                |      0 |           0 |
      | sys      | session                                       |      0 |           0 |
      | sys      | x$host_summary_by_statement_type              |      0 |           0 |
      | sys      | x$user_summary_by_statement_type              |      0 |           0 |
      | sys      | schema_redundant_indexes                      |      0 |           0 |
      | sys      | x$schema_table_statistics_with_buffer         |      0 |           0 |
      | sys      | x$host_summary_by_stages                      |      0 |           0 |
      | sys      | x$io_global_by_wait_by_latency                |      0 |           0 |
      | sys      | wait_classes_global_by_latency                |      0 |           0 |
      | sys      | x$user_summary_by_stages                      |      0 |           0 |
      | sys      | x$io_global_by_file_by_latency                |      0 |           0 |
      | sys      | x$memory_global_total                         |      0 |           0 |
      | sys      | x$schema_tables_with_full_table_scans         |      0 |           0 |
      | sys      | innodb_lock_waits                             |      0 |           0 |
      | sys      | innodb_buffer_stats_by_schema                 |      0 |           0 |
      | sys      | schema_auto_increment_columns                 |      0 |           0 |
      | sys      | x$schema_table_lock_waits                     |      0 |           0 |
      | sys      | x$schema_flattened_keys                       |      0 |           0 |
      | sys      | x$memory_by_host_by_current_bytes             |      0 |           0 |
      | sys      | x$memory_by_user_by_current_bytes             |      0 |           0 |
      | sys      | memory_by_thread_by_current_bytes             |      0 |           0 |
      | sys      | x$io_by_thread_by_latency                     |      0 |           0 |
      | sys      | x$waits_global_by_latency                     |      0 |           0 |
      | sys      | schema_index_statistics                       |      0 |           0 |
      | sys      | x$ps_schema_table_statistics_io               |      0 |           0 |
      | sys      | memory_by_host_by_current_bytes               |      0 |           0 |
      | sys      | memory_by_user_by_current_bytes               |      0 |           0 |
      | sys      | metrics                                       |      0 |           0 |
      | sys      | x$statements_with_sorting                     |      0 |           0 |
      | sys      | host_summary_by_file_io                       |      0 |           0 |
      | sys      | x$schema_table_statistics                     |      0 |           0 |
      | sys      | x$schema_index_statistics                     |      0 |           0 |
      | sys      | schema_tables_with_full_table_scans           |      0 |           0 |
      | sys      | io_by_thread_by_latency                       |      0 |           0 |
      | sys      | waits_global_by_latency                       |      0 |           0 |
      | sys      | x$innodb_lock_waits                           |      0 |           0 |
      | sys      | user_summary_by_file_io                       |      0 |           0 |
      | sys      | user_summary_by_statement_latency             |      0 |           0 |
      | sys      | host_summary_by_statement_latency             |      0 |           0 |
      | mysql    | servers                                       |      0 |           0 |
      | foodmart | sessions                                      |      0 |           0 |
      | foodmart | reserve_employee                              |      0 |           0 |
      | world    | Country                                       |      0 |           0 |
      | mysql    | procs_priv                                    |      0 |           0 |
      | mysql    | table_stats                                   |      0 |           0 |
      | mysql    | index_stats                                   |      0 |           0 |
      | mysql    | plugin                                        |      0 |           0 |
      | foodmart | employee                                      |      0 |           0 |
      | foodmart | product                                       |      0 |           0 |
      | foodmart | category                                      |      0 |           0 |
      | foodmart | currency                                      |      0 |           0 |
      | mysql    | time_zone_transition                          |      0 |           0 |
      | foodmart | promotion                                     |      0 |           0 |
      | mysql    | time_zone_leap_second                         |      0 |           0 |
      | world    | CountryLanguage                               |      0 |           0 |
      | mysql    | time_zone                                     |      0 |           0 |
      | foodmart | days                                          |      0 |           0 |
      | mysql    | wsrep_streaming_log                           |      0 |           0 |
      | foodmart | salary                                        |      0 |           0 |
      | mysql    | help_category                                 |      0 |           0 |
      | foodmart | department                                    |      0 |           0 |
      | mysql    | general_log                                   |      0 |           0 |
      | mysql    | user                                          |      0 |           0 |
      | mysql    | roles_mapping                                 |      0 |           0 |
      | mysql    | time_zone_transition_type                     |      0 |           0 |
      | mysql    | proxies_priv                                  |      0 |           0 |
      | mysql    | event                                         |      0 |           0 |
      | mysql    | columns_priv                                  |      0 |           0 |
      | mysql    | wsrep_cluster_members                         |      0 |           0 |
      | percona  | checksums                                     |      0 |           0 |
      | world    | City                                          |      0 |           0 |
      | mysql    | proc                                          |      0 |           0 |
      | mysql    | help_keyword                                  |      0 |           0 |
      | mysql    | func                                          |      0 |           0 |
      | foodmart | sales_fact                                    |      0 |           0 |
      | mysql    | time_zone_name                                |      0 |           0 |
      | mysql    | db                                            |      0 |           0 |
      | mysql    | slow_log                                      |      0 |           0 |
      | foodmart | time_by_day                                   |      0 |           0 |
      | foodmart | inventory_fact                                |      0 |           0 |
      | foodmart | store                                         |      0 |           0 |
      | foodmart | account                                       |      0 |           0 |
      | foodmart | position                                      |      0 |           0 |
      | foodmart | product_class                                 |      0 |           0 |
      | mysql    | column_stats                                  |      0 |           0 |
      | mysql    | help_topic                                    |      0 |           0 |
      | foodmart | warehouse_class                               |      0 |           0 |
      | mysql    | wsrep_allowlist                               |      0 |           0 |
      | foodmart | expense_fact                                  |      0 |           0 |
      | mysql    | help_relation                                 |      0 |           0 |
      | test     | test                                          |      0 |           0 |
      | mysql    | global_priv                                   |      0 |           0 |
      | mysql    | tables_priv                                   |      0 |           0 |
      | mysql    | wsrep_cluster                                 |      0 |           0 |
      | foodmart | warehouse                                     |      0 |           0 |
      | foodmart | basket                                        |      0 |           0 |
      | foodmart | region                                        |      0 |           0 |
      | foodmart | customer                                      |      0 |           0 |
      | mysql    | gtid_slave_pos                                |      0 |           0 |
      | mysql    | innodb_table_stats                            |      0 |           0 |
      | mysql    | innodb_index_stats                            |      0 |           0 |
      | mysql    | transaction_registry                          |      0 |           0 |
      +----------+-----------------------------------------------+--------+-------------+
      

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            Unassigned Unassigned
            oli Oli Sennhauser
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            Dates

              Created:
              Updated:

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