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https://dev.mysql.com/doc/refman/9.7/en/show-engine.html
SHOW ENGINE engine_name {STATUS | MUTEX} SHOW ENGINE displays operational information about a storage engine. The statement has these variants: SHOW ENGINE INNODB STATUS SHOW ENGINE INNODB MUTEX SHOW ENGINE PERFORMANCE_SCHEMA STATUS SHOW ENGINE ...
https://dev.mysql.com/doc/refman/9.7/en/srjs-api-prepared-statements.html
The prepared statement API allows supported SQL statements (see SQL Syntax Permitted in Prepared Statements) to be re-executed without incurring the cost of parsing and optimization each time. The question mark or interrogation point (?) is used as ...
https://dev.mysql.com/doc/refman/9.7/en/srjs-examples.html
This section contains examples illustrating a number of different aspects of using JavaScript programs under various circumstances. The following example demonstrates the use of a JavaScript stored function with table column values. Next, we create ...
https://dev.mysql.com/doc/refman/9.7/en/sys-host-summary-by-file-io-type.html
These views summarize file I/O, grouped by host and event type. By default, rows are sorted by host and descending total I/O latency. The host_summary_by_file_io_type and x$host_summary_by_file_io_type views have these columns: host The host from ...
https://dev.mysql.com/doc/refman/9.7/en/sys-host-summary-by-stages.html
By default, rows are sorted by host and descending total latency. The host_summary_by_stages and x$host_summary_by_stages views have these columns: host The host from which the client connected. Rows for which the HOST column in the underlying ...
https://dev.mysql.com/doc/refman/9.7/en/sys-user-summary-by-file-io-type.html
These views summarize file I/O, grouped by user and event type. By default, rows are sorted by user and descending total latency. The user_summary_by_file_io_type and x$user_summary_by_file_io_type views have these columns: user The client user ...
https://dev.mysql.com/doc/refman/9.7/en/sys-user-summary-by-stages.html
By default, rows are sorted by user and descending total stage latency. The user_summary_by_stages and x$user_summary_by_stages views have these columns: user The client user name. Rows for which the USER column in the underlying Performance Schema ...
https://dev.mysql.com/doc/refman/9.7/en/table-locking.html
InnoDB tables use row-level locking so that multiple sessions and applications can read from and write to the same table simultaneously, without making each other wait or producing inconsistent results. For this storage engine, avoid using the LOCK ...
https://dev.mysql.com/doc/refman/9.7/en/window-function-descriptions.html
This section describes nonaggregate window functions that, for each row from a query, perform a calculation using rows related to that row. Most aggregate functions also can be used as window functions; see Section 14.19.1, “Aggregate Function ...
https://dev.mysql.com/doc/refman/9.7/en/mysql-cluster-install-example-data.html
Note The information in this section applies to NDB Cluster running on both Unix and Windows platforms. Working with database tables and data in NDB Cluster is not much different from doing so in standard MySQL. There are two key points to keep in ...