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https://dev.mysql.com/doc/refman/8.0/en/subquery-optimization-with-exists.html
Most optimizations cannot deal with predicates that may be turned on and off at query execution time, so they assume any trigcond(X) to be an unknown function and ignore it. WHERE subquery_where) MySQL evaluates queries “from outside to inside.” ... Certain optimizations are applicable to comparisons that use the IN (or =ANY) operator to test subquery ...
https://dev.mysql.com/doc/refman/8.0/en/windows-installation.html
To accommodate the RESTART statement, the MySQL server forks when run as a service or standalone, to enable a monitor process to supervise the server process. This is due to the fingerprinting mechanism used by the virus-scanning software, and the ...MySQL Installer Method The simplest and recommended method is to download MySQL Installer (for Windows) and let it install and configure a specific version of MySQL Server as follows: Download MySQL Installer from https://dev.mysql.com/downloads/installer/ and execute ...
https://dev.mysql.com/doc/refman/8.0/en/audit-log-filtering.html
The filtering functions just described affect audit filtering immediately and update the audit log tables in the mysql system database that store filters and user accounts (see Audit Log Tables). It is also possible to modify the audit log tables ...
https://dev.mysql.com/doc/refman/8.0/en/create-table-ndb-comment-options.html
This may be suitable for short-lived data which is frequently updated, and where the loss of all data in the unlikely event of a total cluster failure is acceptable. Table-level options for controlling read from any replica and partition balance can ... NDB_COLUMN Options NDB_TABLE Options It is possible to set a number of options specific to NDB Cluster in the table comment or column comments of an NDB ...
https://dev.mysql.com/doc/refman/8.0/en/error-log-priority-based-filtering.html
The log_filter_internal log filter component implements a simple form of log filtering based on error event priority and error code. To affect how log_filter_internal permits or suppresses error, warning, and information events intended for the ...
https://dev.mysql.com/doc/refman/8.0/en/faqs-thread-pool.html
What is the Thread Pool and what problem does it solve? A.15.2. How does the Thread Pool limit and manage concurrent sessions and transactions for optimal performance and throughput? A.15.3. The default thread-handling model in MySQL Server executes ...How is the Thread Pool different from the client side Connection Pool? ...
https://dev.mysql.com/doc/refman/8.0/en/data-masking.html
If you are using MySQL Enterprise Data Masking and De-Identification for the first time, consider installing the components for access to the ongoing enhancements only available with component infrastructure. Note MySQL Enterprise Data Masking and ...Substitution of data by data from dictionaries stored in the ...
https://dev.mysql.com/doc/refman/8.0/en/charset-database.html
For stored routines (procedures and functions), the database character set and collation in effect at routine creation time are used as the character set and collation of character data parameters for which the declaration includes no CHARACTER SET ... Every database has a database character set and a database ...To see the default collation for each character set, use the SHOW CHARACTER ...
https://dev.mysql.com/doc/refman/8.0/en/binary-varbinary.html
The BINARY and VARBINARY types are similar to CHAR and VARCHAR, except that they store binary strings rather than nonbinary strings. This means they have the binary character set and collation, and comparison and sorting are based on the numeric ...
https://dev.mysql.com/doc/refman/8.0/en/optimize-overview.html
As you work on database performance, you start by learning the high-level rules and guidelines for the software side, and measuring performance using wall-clock time. This time improves slowly with new disks and is very hard to optimize for a single ... Database performance depends on several factors at the database level, such as tables, queries, and configuration ...In practice, the advanced ...