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https://dev.mysql.com/doc/refman/8.0/en/problems-connecting.html
After a fresh installation, if you try to log on to the server as root without using a password, you might get the following error message. $> mysql -u root ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO) It means ... If you encounter problems when you try to connect to the MySQL server, the following items describe some courses of action you can take to correct the ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-programs-ndb-restore.html
It can contain any of the ASCII characters having character codes 32, 35, 38, 40-91, 93, 95, and 97-126; in other words, it can use any printable ASCII characters except for !, ', ", $, %, \, and ^. --core-file Command-Line Format --core-file Write ... The NDB Cluster restoration program is implemented as a separate command-line utility ndb_restore, which can normally be found in the MySQL bin ...
https://dev.mysql.com/doc/refman/8.0/en/server-configuration-validation.html
As of MySQL 8.0.16, MySQL Server supports a --validate-config option that enables the startup configuration to be checked for problems without running the server in normal operational mode: mysqld --validate-config If no errors are found, the ...
https://dev.mysql.com/doc/refman/8.0/en/host-cache.html
The MySQL server maintains an in-memory host cache that contains information about clients: IP address, host name, and error information. The cache contains information about errors that occur during the client connection process. Some errors are ...The Performance Schema host_cache table exposes the contents of the host cache so that it can be examined using SELECT ...
https://dev.mysql.com/doc/refman/8.0/en/replication-options-binary-log.html
If you specify --log-slave-updates or --slave-preserve-commit-order together with --skip-log-bin or --disable-log-bin, a warning or error message is issued. Setting this variable on the source to a value unrecognized by the replica causes the ...
https://dev.mysql.com/doc/refman/8.0/en/added-deprecated-removed.html
check-table-functions: How to proceed when scanning data dictionary for functions used in table constraints and other expressions, and such a function causes an error. innodb_print_ddl_logs: Whether or not to print DDL logs to error log. Options ...
https://dev.mysql.com/doc/refman/8.0/en/bug-reports.html
If the problem occurs during compilation, include the exact error messages and also a few lines of context around the offending code in the file where the error occurs. If you get a parse error for an SQL statement, please check your syntax closely.
https://dev.mysql.com/doc/refman/8.0/en/windows-troubleshooting.html
When installing and running MySQL for the first time, you may encounter certain errors that prevent the MySQL server from starting. This section helps you diagnose and correct some of these errors. Your first resource when troubleshooting server ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-buffer-pool-resize.html
| +----------------------------------+----------------------------------+ From MyQL 8.0.31, you can also monitor an online buffer pool resizing operation using the Innodb_buffer_pool_resize_status_code and Innodb_buffer_pool_resize_status_progress ... You can configure InnoDB buffer pool size offline or while the server is ...
https://dev.mysql.com/doc/refman/8.0/en/create-index.html
For a unique index, an error occurs regardless of SQL mode because reducing the index length might enable insertion of nonunique entries that do not meet the specified uniqueness requirement. An error occurs if a key part definition contains ...