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https://dev.mysql.com/doc/refman/8.0/en/mysql-shell-tutorial-javascript-indexes-create.html
Without an index, MySQL must begin with the first document and then read through the entire collection to find the relevant fields. If a collection is large and queries on a specific field are common, then consider creating an index on a specific ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-shell-tutorial-python-documents-index.html
Without an index, MySQL must begin with the first document and then read through the entire collection to find the relevant fields. If a collection is large and queries on a specific field are common, then consider creating an index on a specific ...
https://dev.mysql.com/doc/refman/8.0/en/password-logging.html
Passwords can be written as plain text in SQL statements such as CREATE USER, GRANT and SET PASSWORD. PASSWORD ...) Passwords in those statements are rewritten to not appear literally in statement text written to the general query log, slow query ...If such statements are logged by the MySQL server as written, passwords in them become visible to anyone with access to the ...
https://dev.mysql.com/doc/refman/8.0/en/replication-features-row-searches.html
If there are suitable indexes, one index is selected from the candidates, in the following priority order: A primary key. If the row is found in the hash table, the record in the target table is updated, and the row is deleted from the hash table.
https://dev.mysql.com/doc/refman/8.0/en/replication-features-sql-mode.html
Using different server SQL mode settings on the source and the replica may cause the same INSERT statements to be handled differently on the source and the replica, leading the source and replica to diverge. For best results, you should always use ...This advice applies whether you are using statement-based or row-based ...
https://dev.mysql.com/doc/refman/8.0/en/replication-features-variables.html
In addition, the enabling this variable has different effects with regard to temporary tables, table locking, and the SET PASSWORD statement in different MySQL versions. In statement-based replication, session variables are not replicated properly ...sql_mode is also replicated except for the NO_DIR_IN_CREATE mode; the replica always preserves its own value for NO_DIR_IN_CREATE, regardless of changes to it on the ...
https://dev.mysql.com/doc/refman/8.0/en/replication-solutions-diffengines.html
If you are already running a replication solution and want to convert your existing tables to another engine type, follow these steps: Stop the replica from running replication updates: mysql> STOP SLAVE; Or from MySQL 8.0.22: mysql> STOP REPLICA; ... It does not matter for the replication process whether the original table on the source and the replicated table on the replica use different storage engine ...
https://dev.mysql.com/doc/refman/8.0/en/which-version.html
When preparing to install MySQL, decide which version and distribution format (binary or source) to use. The naming scheme in MySQL 8.0 uses release names that consist of three numbers and an optional suffix (for example, mysql-8.0.34). Taken ...
https://dev.mysql.com/doc/refman/8.0/en/sys-io-global-by-wait-by-bytes.html
These views summarize global I/O consumers to display amount of I/O and time waiting for I/O, grouped by event. By default, rows are sorted by descending total I/O (bytes read and written). The io_global_by_wait_by_bytes and ...avg_read The average ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-innodb-tablestats-table.html
MODIFIED_COUNTER The number of rows modified by DML operations, such as INSERT, UPDATE, DELETE, and also cascade operations from foreign keys. The rate at which the AUTOINC value changes depends on how many times auto-increment numbers have been ...