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https://dev.mysql.com/doc/refman/8.4/en/upgrade-prerequisites.html
Before upgrading to the latest MySQL 8.4 release, ensure the upgrade readiness of your current MySQL 8.3 or MySQL 8.4 server instance by performing the preliminary checks described below. Tip Consider using the MySQL Shell upgrade checker utility ...
https://dev.mysql.com/doc/refman/8.4/en/view-restrictions.html
This can cause problems in the following circumstances for views with too-long aliases: View definitions fail to replicate to newer replicas that enforce the column-length restriction. The maximum number of tables that can be referenced in the ...
https://dev.mysql.com/doc/mysql-enterprise-backup/8.4/en/advanced.encrypted-binlog-relaylog.html
If you want to use another keyring plugin or component (for example, the backed-up server was using keyring_aws and you want the restored server to use it too, or you simply want to switch to a new component or plugin), a keyring migration can be ...
https://dev.mysql.com/doc/mysql-enterprise-backup/8.4/en/backup-commands-validate.html
To avoid spending excessive time and resources on files that are too heavily corrupted, mysqlbackup stops validating a .ibd file after more than twenty corrupted pages are found in it, and proceeds to the next file instead. To ensure the integrity ...
https://dev.mysql.com/doc/mysql-enterprise-backup/8.4/en/bugs.corruption.html
Here are some suggestions for dealing with it: The problem can occur if the MySQL server is too busy. Try set the value to, for example, “1000”, to allow more rereads during checksum failures before MySQL Enterprise Backup gives up and throws an ...170225 10:46:26 PCR1 ERROR: Page at offset 0 in D:/temp/5.7_source/test/emp2.ibd seems corrupt! A corruption problem can have different ...
https://dev.mysql.com/doc/mysql-enterprise-backup/8.4/en/meb-encrypted-innodb.html
For details on how the MySQL server encrypts and decrypts InnoDB tablespaces, see InnoDB Data-at-Rest Encryption—it explains concepts like master key and tablespace keys, which are important for understanding how MySQL Enterprise Backup works with ...
https://dev.mysql.com/doc/mysql-enterprise-backup/8.4/en/restore-performance.html
Thus, the more critical the data is, the more likely that you might choose not to use compression: accepting a slower, larger backup to ensure that the restore process is as fast and reliable as possible. If the CPU is not too busy (less than 80% ...
https://dev.mysql.com/doc/c-api/8.4/en/mysql-binlog-open.html
Errors CR_FILE_NAME_TOO_LONG The specified binary log file name was too long. int mysql_binlog_open(MYSQL *mysql, MYSQL_RPL *rpl) Description Open a new replication event stream, to read a MySQL server binary log. rpl: A MYSQL_RPL structure that ...
https://dev.mysql.com/doc/c-api/8.4/en/mysql-change-user.html
bool mysql_change_user(MYSQL *mysql, const char *user, const char *password, const char *db) Description Changes the user and causes the database specified by db to become the default (current) database on the connection specified by mysql. In ...
https://dev.mysql.com/doc/extending-mysql/8.4/en/mysql-threads.html
This thread also normally handles alarms and calls process_alarm() to force timeouts on connections that have been idle too long. The MySQL server creates the following threads: Connection manager threads handle client connection requests on the ...