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https://dev.mysql.com/doc/refman/5.7/en/sys-ps-thread-id.html
Returns the Performance Schema thread ID assigned to a given connection ID, or the thread ID for the current connection if the connection ID is NULL. Parameters in_connection_id BIGINT UNSIGNED: The ID of the connection for which to return the ...
https://dev.mysql.com/doc/refman/5.7/en/sys-wait-classes-global-by-avg-latency.html
These views summarize wait class average latencies, grouped by event class. An event class is determined by stripping from the event name everything after the first three components. The wait_classes_global_by_avg_latency and ...
https://dev.mysql.com/doc/refman/5.7/en/sys-wait-classes-global-by-latency.html
These views summarize wait class total latencies, grouped by event class. An event class is determined by stripping from the event name everything after the first three components. The wait_classes_global_by_latency and ...
https://dev.mysql.com/doc/refman/5.7/en/system-optimization.html
Some system-level factors can affect performance in a major way: If you have enough RAM, you could remove all swap devices. Just remember to take down the server (or lock and flush the relevant tables) before you run myisamchk. Some operating ...
https://dev.mysql.com/doc/refman/5.7/en/thread-pool.html
As more clients connect to the server and execute statements, overall performance degrades. The thread pool plugin provides an alternative thread-handling model designed to reduce overhead and improve performance. The plugin implements a thread pool ... Note MySQL Enterprise Thread Pool is an extension included in MySQL Enterprise Edition, a commercial ...
https://dev.mysql.com/doc/refman/5.7/en/version-tokens.html
Version token lists are established per server (for example, to specify the server assignment or operational state). The following sections describe the elements of Version Tokens, discuss how to install and use it, and provide reference information ... MySQL includes Version Tokens, a feature that enables creation of and synchronization around server tokens that applications can use to prevent accessing incorrect or out-of-date ...
https://dev.mysql.com/doc/refman/5.7/en/information-schema.html
INFORMATION_SCHEMA provides access to database metadata, information about the MySQL server such as the name of a database or table, the data type of a column, or access privileges. Other terms that are sometimes used for this information are data ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-benchmarking.html
If InnoDB is not the default storage engine, you can determine if your database server and applications work correctly with InnoDB by restarting the server with --default-storage-engine=InnoDB on the command line or with ...If a table relies on a ...
https://dev.mysql.com/doc/refman/5.7/en/optimize-numeric.html
If you are using numeric data, it is faster in many cases to access information from a database (using a live connection) than to access a text file. Information in the database is likely to be stored in a more compact format than in the text file, ... For unique IDs or other values that can be represented as either strings or numbers, prefer numeric columns to string ...Since large numeric values ...
https://dev.mysql.com/doc/refman/5.7/en/optimizing-innodb.html
This section explains how to optimize database operations for InnoDB tables. InnoDB is the storage engine that MySQL customers typically use in production databases where reliability and concurrency are important.