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首页"MySQL 5.6参考手册:技术开发人员必备的关系型数据库管理系统指南"
"MySQL 5.6参考手册:技术开发人员必备的关系型数据库管理系统指南"
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更新于2023-12-19
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MySQL 5.6参考手册是一本分享给IT相关技术开发人员进行参考的重要文档,其英文版文件名为"MySql参考手册-5.6-en.a4.pdf"。MySQL是一个关系型数据库管理系统,由瑞典MySQL AB公司开发,现在属于Oracle旗下产品。MySQL在WEB应用方面广泛应用,被认为是最好的关系型数据库管理系统之一。
该参考手册详细记录了MySQL 5.6版本的信息,包括了MySQL 5.6到5.6.51的内容,以及基于NDB Cluster 7.3和7.4版本的NDB Cluster发布版,从5.6.50-ndb-7.3.31到5.6.50-ndb-7.4.30。手册中也可能包括了一些尚未发布版本的MySQL版本特性的文档,但读者可以通过MySQL 5.6发布说明来获取已发布版本的相关信息。
MySQL 5.6参考手册涵盖了众多功能和特性。它提供了关于MySQL数据库管理系统的全面介绍,包括了数据库的结构、使用、维护以及性能优化等方面的内容。通过该手册,读者可以深入了解MySQL数据库的各种操作和功能,以及如何使用MySQL进行开发和管理。
该手册的目标读者主要是IT相关技术开发人员,包括数据库管理员、系统工程师、软件开发人员等。对于那些希望通过MySQL构建和维护大型和复杂数据库系统的专业人员来说,这本参考手册将是一个非常宝贵的资源。
除了介绍MySQL数据库本身的特性外,该手册还对NDB Cluster进行了详细的介绍。NDB Cluster是MySQL数据库的集群解决方案,具有高可用性和可伸缩性。通过MySQL 5.6参考手册,读者可以了解如何使用NDB Cluster来构建一个强大的、高性能的MySQL集群系统。
总的来说,MySQL 5.6参考手册是一本全面、权威的技术文档,为MySQL数据库管理系统的学习和使用提供了极大的便利。它不仅是一个宝贵的学习资料,也是一个实用的参考工具,对于希望深入了解MySQL数据库管理系统的专业人员来说,是一本不可或缺的工具书。MySQL的流行和应用广泛都离不开这份详尽的参考手册的支持和指导。
MySQL 5.6 Reference Manual
15.4.1 Repairing and Checking CSV Tables ............................................................. 2141
15.4.2 CSV Limitations ............................................................................................ 2141
15.5 The ARCHIVE Storage Engine ................................................................................. 2141
15.6 The BLACKHOLE Storage Engine ........................................................................... 2143
15.7 The MERGE Storage Engine ................................................................................... 2145
15.7.1 MERGE Table Advantages and Disadvantages .............................................. 2148
15.7.2 MERGE Table Problems ............................................................................... 2148
15.8 The FEDERATED Storage Engine ........................................................................... 2150
15.8.1 FEDERATED Storage Engine Overview ......................................................... 2150
15.8.2 How to Create FEDERATED Tables .............................................................. 2151
15.8.3 FEDERATED Storage Engine Notes and Tips ................................................ 2154
15.8.4 FEDERATED Storage Engine Resources ....................................................... 2155
15.9 The EXAMPLE Storage Engine ................................................................................ 2155
15.10 Other Storage Engines .......................................................................................... 2156
15.11 Overview of MySQL Storage Engine Architecture .................................................... 2156
15.11.1 Pluggable Storage Engine Architecture ........................................................ 2156
15.11.2 The Common Database Server Layer .......................................................... 2157
16 High Availability and Scalability ........................................................................................... 2159
16.1 Using ZFS Replication ............................................................................................. 2161
16.1.1 Using ZFS for File System Replication ........................................................... 2162
16.1.2 Configuring MySQL for ZFS Replication ......................................................... 2163
16.1.3 Handling MySQL Recovery with ZFS ............................................................. 2163
16.2 Using MySQL with memcached ................................................................................ 2164
16.2.1 Installing memcached .................................................................................... 2165
16.2.2 Using memcached ........................................................................................ 2166
16.2.3 Developing a memcached Application ............................................................ 2185
16.2.4 Getting memcached Statistics ........................................................................ 2208
16.2.5 memcached FAQ .......................................................................................... 2216
17 Replication ......................................................................................................................... 2221
17.1 Replication Configuration ......................................................................................... 2222
17.1.1 How to Set Up Replication ............................................................................ 2223
17.1.2 Replication Formats ...................................................................................... 2233
17.1.3 Replication with Global Transaction Identifiers ................................................ 2240
17.1.4 Replication and Binary Logging Options and Variables .................................... 2249
17.1.5 Common Replication Administration Tasks ..................................................... 2310
17.2 Replication Implementation ...................................................................................... 2313
17.2.1 Replication Threads ...................................................................................... 2313
17.2.2 Relay Log and Replication Metadata Repositories .......................................... 2316
17.2.3 How Servers Evaluate Replication Filtering Rules ........................................... 2323
17.3 Replication Solutions ............................................................................................... 2328
17.3.1 Using Replication for Backups ....................................................................... 2329
17.3.2 Handling an Unexpected Halt of a Replica Server .......................................... 2332
17.3.3 Using Replication with Different Source and Replica Storage Engines .............. 2334
17.3.4 Using Replication for Scale-Out ..................................................................... 2335
17.3.5 Replicating Different Databases to Different Replicas ...................................... 2337
17.3.6 Improving Replication Performance ................................................................ 2338
17.3.7 Switching Sources During Failover ................................................................ 2339
17.3.8 Setting Up Replication to Use Encrypted Connections .................................... 2341
17.3.9 Semisynchronous Replication ........................................................................ 2343
17.3.10 Delayed Replication .................................................................................... 2347
17.4 Replication Notes and Tips ...................................................................................... 2348
17.4.1 Replication Features and Issues .................................................................... 2348
17.4.2 Replication Compatibility Between MySQL Versions ....................................... 2370
17.4.3 Upgrading a Replication Setup ...................................................................... 2371
17.4.4 Troubleshooting Replication .......................................................................... 2373
17.4.5 How to Report Replication Bugs or Problems ................................................. 2374
18 MySQL NDB Cluster 7.3 and NDB Cluster 7.4 .................................................................... 2377
18.1 NDB Cluster Overview ............................................................................................. 2380
xvi
MySQL 5.6 Reference Manual
18.1.1 NDB Cluster Core Concepts .......................................................................... 2382
18.1.2 NDB Cluster Nodes, Node Groups, Fragment Replicas, and Partitions ............. 2384
18.1.3 NDB Cluster Hardware, Software, and Networking Requirements .................... 2387
18.1.4 What is New in MySQL NDB Cluster ............................................................. 2389
18.1.5 NDB: Added, Deprecated, and Removed Options, Variables, and Parameters .. 2393
18.1.6 MySQL Server Using InnoDB Compared with NDB Cluster ............................. 2398
18.1.7 Known Limitations of NDB Cluster ................................................................. 2400
18.2 NDB Cluster Installation ........................................................................................... 2411
18.2.1 Installation of NDB Cluster on Linux .............................................................. 2413
18.2.2 Installing NDB Cluster on Windows ............................................................... 2420
18.2.3 Initial Configuration of NDB Cluster ............................................................... 2428
18.2.4 Initial Startup of NDB Cluster ........................................................................ 2430
18.2.5 NDB Cluster Example with Tables and Data .................................................. 2431
18.2.6 Safe Shutdown and Restart of NDB Cluster ................................................... 2434
18.2.7 Upgrading and Downgrading NDB Cluster ..................................................... 2435
18.2.8 The NDB Cluster Auto-Installer (DEPRECATED) ............................................ 2437
18.3 Configuration of NDB Cluster ................................................................................... 2449
18.3.1 Quick Test Setup of NDB Cluster .................................................................. 2449
18.3.2 Overview of NDB Cluster Configuration Parameters, Options, and Variables ..... 2451
18.3.3 NDB Cluster Configuration Files .................................................................... 2468
18.3.4 Using High-Speed Interconnects with NDB Cluster ......................................... 2607
18.4 NDB Cluster Programs ............................................................................................ 2608
18.4.1 ndbd — The NDB Cluster Data Node Daemon .............................................. 2608
18.4.2 ndbinfo_select_all — Select From ndbinfo Tables .................................. 2615
18.4.3 ndbmtd — The NDB Cluster Data Node Daemon (Multi-Threaded) ................. 2617
18.4.4 ndb_mgmd — The NDB Cluster Management Server Daemon ......................... 2618
18.4.5 ndb_mgm — The NDB Cluster Management Client ......................................... 2625
18.4.6 ndb_blob_tool — Check and Repair BLOB and TEXT columns of NDB
Cluster Tables ......................................................................................................... 2627
18.4.7 ndb_config — Extract NDB Cluster Configuration Information ...................... 2629
18.4.8 ndb_cpcd — Automate Testing for NDB Development ................................... 2638
18.4.9 ndb_delete_all — Delete All Rows from an NDB Table ............................. 2638
18.4.10 ndb_desc — Describe NDB Tables ............................................................ 2638
18.4.11 ndb_drop_index — Drop Index from an NDB Table ................................... 2643
18.4.12 ndb_drop_table — Drop an NDB Table ................................................... 2644
18.4.13 ndb_error_reporter — NDB Error-Reporting Utility ................................. 2644
18.4.14 ndb_index_stat — NDB Index Statistics Utility ......................................... 2646
18.4.15 ndb_move_data — NDB Data Copy Utility ................................................. 2651
18.4.16 ndb_print_backup_file — Print NDB Backup File Contents ................... 2653
18.4.17 ndb_print_file — Print NDB Disk Data File Contents .............................. 2653
18.4.18 ndb_print_frag_file — Print NDB Fragment List File Contents .............. 2654
18.4.19 ndb_print_schema_file — Print NDB Schema File Contents .................. 2655
18.4.20 ndb_print_sys_file — Print NDB System File Contents ......................... 2655
18.4.21 ndb_redo_log_reader — Check and Print Content of Cluster Redo Log .... 2655
18.4.22 ndb_restore — Restore an NDB Cluster Backup ....................................... 2658
18.4.23 ndb_select_all — Print Rows from an NDB Table ................................... 2678
18.4.24 ndb_select_count — Print Row Counts for NDB Tables ........................... 2681
18.4.25 ndb_setup.py — Start browser-based Auto-Installer for NDB Cluster
(DEPRECATED) ...................................................................................................... 2681
18.4.26 ndb_show_tables — Display List of NDB Tables ....................................... 2684
18.4.27 ndb_size.pl — NDBCLUSTER Size Requirement Estimator ...................... 2686
18.4.28 ndb_waiter — Wait for NDB Cluster to Reach a Given Status ..................... 2689
18.4.29 Options Common to NDB Cluster Programs — Options Common to NDB
Cluster Programs .................................................................................................... 2691
18.5 Management of NDB Cluster ................................................................................... 2696
18.5.1 Commands in the NDB Cluster Management Client ........................................ 2697
18.5.2 NDB Cluster Log Messages .......................................................................... 2701
18.5.3 Event Reports Generated in NDB Cluster ...................................................... 2715
xvii
MySQL 5.6 Reference Manual
18.5.4 Summary of NDB Cluster Start Phases .......................................................... 2725
18.5.5 Performing a Rolling Restart of an NDB Cluster ............................................. 2727
18.5.6 NDB Cluster Single User Mode ..................................................................... 2729
18.5.7 Adding NDB Cluster Data Nodes Online ........................................................ 2729
18.5.8 Online Backup of NDB Cluster ...................................................................... 2740
18.5.9 MySQL Server Usage for NDB Cluster .......................................................... 2744
18.5.10 NDB Cluster Disk Data Tables .................................................................... 2746
18.5.11 Online Operations with ALTER TABLE in NDB Cluster .................................. 2753
18.5.12 Distributed Privileges Using Shared Grant Tables ......................................... 2756
18.5.13 NDB API Statistics Counters and Variables .................................................. 2759
18.5.14 ndbinfo: The NDB Cluster Information Database ........................................... 2769
18.5.15 Quick Reference: NDB Cluster SQL Statements ........................................... 2809
18.5.16 NDB Cluster Security Issues ....................................................................... 2811
18.6 NDB Cluster Replication .......................................................................................... 2818
18.6.1 NDB Cluster Replication: Abbreviations and Symbols ..................................... 2820
18.6.2 General Requirements for NDB Cluster Replication ........................................ 2820
18.6.3 Known Issues in NDB Cluster Replication ...................................................... 2821
18.6.4 NDB Cluster Replication Schema and Tables ................................................. 2828
18.6.5 Preparing the NDB Cluster for Replication ..................................................... 2830
18.6.6 Starting NDB Cluster Replication (Single Replication Channel) ........................ 2832
18.6.7 Using Two Replication Channels for NDB Cluster Replication .......................... 2833
18.6.8 Implementing Failover with NDB Cluster Replication ....................................... 2834
18.6.9 NDB Cluster Backups With NDB Cluster Replication ....................................... 2836
18.6.10 NDB Cluster Replication: Bidrectional and Circular Replication ...................... 2842
18.6.11 NDB Cluster Replication Conflict Resolution ................................................. 2845
18.7 NDB Cluster Release Notes ..................................................................................... 2859
19 Partitioning ......................................................................................................................... 2861
19.1 Overview of Partitioning in MySQL ........................................................................... 2863
19.2 Partitioning Types .................................................................................................... 2865
19.2.1 RANGE Partitioning ...................................................................................... 2867
19.2.2 LIST Partitioning ........................................................................................... 2871
19.2.3 COLUMNS Partitioning ................................................................................. 2873
19.2.4 HASH Partitioning ......................................................................................... 2881
19.2.5 KEY Partitioning ........................................................................................... 2884
19.2.6 Subpartitioning .............................................................................................. 2885
19.2.7 How MySQL Partitioning Handles NULL ........................................................ 2888
19.3 Partition Management .............................................................................................. 2893
19.3.1 Management of RANGE and LIST Partitions .................................................. 2894
19.3.2 Management of HASH and KEY Partitions ..................................................... 2899
19.3.3 Exchanging Partitions and Subpartitions with Tables ....................................... 2900
19.3.4 Maintenance of Partitions .............................................................................. 2905
19.3.5 Obtaining Information About Partitions ........................................................... 2906
19.4 Partition Pruning ...................................................................................................... 2908
19.5 Partition Selection .................................................................................................... 2912
19.6 Restrictions and Limitations on Partitioning ............................................................... 2917
19.6.1 Partitioning Keys, Primary Keys, and Unique Keys ......................................... 2924
19.6.2 Partitioning Limitations Relating to Storage Engines ........................................ 2927
19.6.3 Partitioning Limitations Relating to Functions .................................................. 2928
19.6.4 Partitioning and Locking ................................................................................ 2930
20 Stored Objects ................................................................................................................... 2933
20.1 Defining Stored Programs ........................................................................................ 2934
20.2 Using Stored Routines ............................................................................................. 2935
20.2.1 Stored Routine Syntax .................................................................................. 2936
20.2.2 Stored Routines and MySQL Privileges ......................................................... 2936
20.2.3 Stored Routine Metadata .............................................................................. 2937
20.2.4 Stored Procedures, Functions, Triggers, and LAST_INSERT_ID() .................... 2937
20.3 Using Triggers ......................................................................................................... 2937
20.3.1 Trigger Syntax and Examples ........................................................................ 2938
xviii
MySQL 5.6 Reference Manual
20.3.2 Trigger Metadata .......................................................................................... 2941
20.4 Using the Event Scheduler ...................................................................................... 2942
20.4.1 Event Scheduler Overview ............................................................................ 2942
20.4.2 Event Scheduler Configuration ...................................................................... 2943
20.4.3 Event Syntax ................................................................................................ 2945
20.4.4 Event Metadata ............................................................................................ 2945
20.4.5 Event Scheduler Status ................................................................................. 2946
20.4.6 The Event Scheduler and MySQL Privileges .................................................. 2947
20.5 Using Views ............................................................................................................ 2949
20.5.1 View Syntax ................................................................................................. 2949
20.5.2 View Processing Algorithms .......................................................................... 2950
20.5.3 Updatable and Insertable Views .................................................................... 2951
20.5.4 The View WITH CHECK OPTION Clause ...................................................... 2953
20.5.5 View Metadata .............................................................................................. 2953
20.6 Stored Object Access Control .................................................................................. 2953
20.7 Stored Program Binary Logging ............................................................................... 2957
20.8 Restrictions on Stored Programs .............................................................................. 2962
20.9 Restrictions on Views .............................................................................................. 2966
21 INFORMATION_SCHEMA Tables ....................................................................................... 2969
21.1 Introduction ............................................................................................................. 2970
21.2 The INFORMATION_SCHEMA CHARACTER_SETS Table ....................................... 2973
21.3 The INFORMATION_SCHEMA COLLATIONS Table ................................................. 2973
21.4 The INFORMATION_SCHEMA COLLATION_CHARACTER_SET_APPLICABILITY
Table .............................................................................................................................. 2974
21.5 The INFORMATION_SCHEMA COLUMNS Table ..................................................... 2974
21.6 The INFORMATION_SCHEMA COLUMN_PRIVILEGES Table .................................. 2977
21.7 The INFORMATION_SCHEMA ENGINES Table ....................................................... 2977
21.8 The INFORMATION_SCHEMA EVENTS Table ......................................................... 2978
21.9 The INFORMATION_SCHEMA GLOBAL_STATUS and SESSION_STATUS Tables .... 2982
21.10 The INFORMATION_SCHEMA GLOBAL_VARIABLES and SESSION_VARIABLES
Tables ............................................................................................................................. 2982
21.11 The INFORMATION_SCHEMA KEY_COLUMN_USAGE Table ................................ 2982
21.12 The INFORMATION_SCHEMA OPTIMIZER_TRACE Table ..................................... 2984
21.13 The INFORMATION_SCHEMA PARAMETERS Table ............................................. 2984
21.14 The INFORMATION_SCHEMA PARTITIONS Table ................................................ 2985
21.15 The INFORMATION_SCHEMA PLUGINS Table ...................................................... 2989
21.16 The INFORMATION_SCHEMA PROCESSLIST Table ............................................. 2990
21.17 The INFORMATION_SCHEMA PROFILING Table .................................................. 2991
21.18 The INFORMATION_SCHEMA REFERENTIAL_CONSTRAINTS Table .................... 2992
21.19 The INFORMATION_SCHEMA ROUTINES Table ................................................... 2993
21.20 The INFORMATION_SCHEMA SCHEMATA Table .................................................. 2995
21.21 The INFORMATION_SCHEMA SCHEMA_PRIVILEGES Table ................................. 2996
21.22 The INFORMATION_SCHEMA STATISTICS Table ................................................. 2997
21.23 The INFORMATION_SCHEMA TABLES Table ....................................................... 2998
21.24 The INFORMATION_SCHEMA TABLESPACES Table ............................................ 3002
21.25 The INFORMATION_SCHEMA TABLE_CONSTRAINTS Table ................................ 3002
21.26 The INFORMATION_SCHEMA TABLE_PRIVILEGES Table .................................... 3003
21.27 The INFORMATION_SCHEMA TRIGGERS Table ................................................... 3003
21.28 The INFORMATION_SCHEMA USER_PRIVILEGES Table ..................................... 3005
21.29 The INFORMATION_SCHEMA VIEWS Table ......................................................... 3006
21.30 INFORMATION_SCHEMA InnoDB Tables .............................................................. 3007
21.30.1 The INFORMATION_SCHEMA INNODB_BUFFER_PAGE Table ................... 3007
21.30.2 The INFORMATION_SCHEMA INNODB_BUFFER_PAGE_LRU Table .......... 3010
21.30.3 The INFORMATION_SCHEMA INNODB_BUFFER_POOL_STATS Table ...... 3013
21.30.4 The INFORMATION_SCHEMA INNODB_CMP and INNODB_CMP_RESET
Tables ..................................................................................................................... 3016
21.30.5 The INFORMATION_SCHEMA INNODB_CMPMEM and
INNODB_CMPMEM_RESET Tables ........................................................................ 3017
xix
MySQL 5.6 Reference Manual
21.30.6 The INFORMATION_SCHEMA INNODB_CMP_PER_INDEX and
INNODB_CMP_PER_INDEX_RESET Tables ........................................................... 3019
21.30.7 The INFORMATION_SCHEMA INNODB_FT_BEING_DELETED Table .......... 3020
21.30.8 The INFORMATION_SCHEMA INNODB_FT_CONFIG Table ........................ 3021
21.30.9 The INFORMATION_SCHEMA INNODB_FT_DEFAULT_STOPWORD Table . 3022
21.30.10 The INFORMATION_SCHEMA INNODB_FT_DELETED Table .................... 3023
21.30.11 The INFORMATION_SCHEMA INNODB_FT_INDEX_CACHE Table ............ 3024
21.30.12 The INFORMATION_SCHEMA INNODB_FT_INDEX_TABLE Table ............. 3025
21.30.13 The INFORMATION_SCHEMA INNODB_LOCKS Table .............................. 3027
21.30.14 The INFORMATION_SCHEMA INNODB_LOCK_WAITS Table .................... 3028
21.30.15 The INFORMATION_SCHEMA INNODB_METRICS Table .......................... 3029
21.30.16 The INFORMATION_SCHEMA INNODB_SYS_COLUMNS Table ................ 3031
21.30.17 The INFORMATION_SCHEMA INNODB_SYS_DATAFILES Table ............... 3032
21.30.18 The INFORMATION_SCHEMA INNODB_SYS_FIELDS Table ..................... 3032
21.30.19 The INFORMATION_SCHEMA INNODB_SYS_FOREIGN Table .................. 3033
21.30.20 The INFORMATION_SCHEMA INNODB_SYS_FOREIGN_COLS Table ....... 3034
21.30.21 The INFORMATION_SCHEMA INNODB_SYS_INDEXES Table .................. 3034
21.30.22 The INFORMATION_SCHEMA INNODB_SYS_TABLES Table .................... 3036
21.30.23 The INFORMATION_SCHEMA INNODB_SYS_TABLESPACES Table ......... 3037
21.30.24 The INFORMATION_SCHEMA INNODB_SYS_TABLESTATS View ............. 3038
21.30.25 The INFORMATION_SCHEMA INNODB_TRX Table .................................. 3039
21.31 INFORMATION_SCHEMA NDB Cluster Tables ....................................................... 3042
21.31.1 The INFORMATION_SCHEMA FILES Table ................................................ 3042
21.31.2 The INFORMATION_SCHEMA ndb_transid_mysql_connection_map Table .... 3047
21.32 INFORMATION_SCHEMA Thread Pool Tables ....................................................... 3048
21.32.1 The INFORMATION_SCHEMA TP_THREAD_GROUP_STATE Table ............ 3049
21.32.2 The INFORMATION_SCHEMA TP_THREAD_GROUP_STATS Table ............ 3050
21.32.3 The INFORMATION_SCHEMA TP_THREAD_STATE Table ......................... 3052
21.33 INFORMATION_SCHEMA Connection-Control Tables ............................................. 3053
21.33.1 The INFORMATION_SCHEMA
CONNECTION_CONTROL_FAILED_LOGIN_ATTEMPTS Table ............................... 3053
21.34 INFORMATION_SCHEMA MySQL Enterprise Firewall Tables .................................. 3053
21.34.1 The INFORMATION_SCHEMA MYSQL_FIREWALL_USERS Table .............. 3054
21.34.2 The INFORMATION_SCHEMA MYSQL_FIREWALL_WHITELIST Table ........ 3054
21.35 Extensions to SHOW Statements ........................................................................... 3054
22 MySQL Performance Schema ............................................................................................. 3057
22.1 Performance Schema Quick Start ............................................................................ 3059
22.2 Performance Schema Build Configuration ................................................................. 3064
22.3 Performance Schema Startup Configuration .............................................................. 3065
22.4 Performance Schema Runtime Configuration ............................................................ 3067
22.4.1 Performance Schema Event Timing ............................................................... 3068
22.4.2 Performance Schema Event Filtering ............................................................. 3071
22.4.3 Event Pre-Filtering ........................................................................................ 3073
22.4.4 Pre-Filtering by Instrument ............................................................................ 3073
22.4.5 Pre-Filtering by Object .................................................................................. 3075
22.4.6 Pre-Filtering by Thread ................................................................................. 3076
22.4.7 Pre-Filtering by Consumer ............................................................................. 3077
22.4.8 Example Consumer Configurations ................................................................ 3080
22.4.9 Naming Instruments or Consumers for Filtering Operations ............................. 3084
22.4.10 Determining What Is Instrumented ............................................................... 3085
22.5 Performance Schema Queries ................................................................................. 3085
22.6 Performance Schema Instrument Naming Conventions .............................................. 3085
22.7 Performance Schema Status Monitoring ................................................................... 3088
22.8 Performance Schema Atom and Molecule Events ..................................................... 3091
22.9 Performance Schema Tables for Current and Historical Events .................................. 3091
22.10 Performance Schema Statement Digests ................................................................ 3093
22.11 Performance Schema General Table Characteristics ............................................... 3096
22.12 Performance Schema Table Descriptions ................................................................ 3097
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