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https://dev.mysql.com/doc/refman/8.4/en/xml-functions.html
No warnings or errors are issued by the server if a variable has the wrong type or has previously not been assigned a value. This also means the user is fully responsible for any typographical errors, since no warnings are given if (for example) ...
https://dev.mysql.com/doc/relnotes/mysql-cluster/8.4/en/news-8-4-3.html
(Bug #36508565) A race condition sometimes occurred between the watchdog thread and the signal execution thread trying to start node failure handling in parallel. (Bug #36694848) Bugs Fixed NDB Cluster APIs: Using NdbRecord and OO_SETVALUE from the ... MySQL NDB Cluster 8.4.3 is a new LTS release of NDB 8.4, based on MySQL Server 8.4 and including features in version 8.4 of the NDB storage engine, as well as fixing recently discovered bugs in previous NDB Cluster ...
https://dev.mysql.com/doc/mysql-monitor/8.0/en/mem-mysql-instance-dashboard-layout.html
Last Error Date Date and time of the last occurrence of this error. If the agent did not shutdown properly, if its host shutdown unexpectedly, or due to a network fault, the state displayed is TIMEDOUT. Last Seen Time and date at which the agent ...
https://dev.mysql.com/doc/refman/8.4/en/innodb-system-tablespace.html
For example, this tablespace has one auto-extending data file: innodb_data_home_dir = innodb_data_file_path = /ibdata/ibdata1:10M:autoextend Suppose that the data file has grown to 988MB over time. If you encounter this error, restore the previous ... The system tablespace is the storage area for the change ...
https://dev.mysql.com/doc/refman/8.4/en/mysql-cluster-programs-ndbmtd.html
This can be done by setting an appropriate value in the config.ini file for the MaxNoOfExecutionThreads configuration parameter or the ThreadConfig configuration parameter. Trace files are generated by critical errors in ndbmtd processes in a ...
https://dev.mysql.com/doc/mysql-enterprise-backup/8.4/en/meb-troubleshooting.html
You can query those tables to monitor ongoing backup jobs, see how much time has been used for various stages, and check if any errors have occurred. If mysqlbackup encounters problems during operating system calls, it returns the corresponding OS ... To troubleshoot issues regarding backup and restore with the MySQL Enterprise Backup product, consider the following aspects: Before troubleshooting any problem, familiarize yourself with the known limits and restrictions on the product, in Appendix B, Limitations of MySQL Enterprise ...
https://dev.mysql.com/doc/c-api/8.4/en/c-api-building-clients.html
For example: gcc -o progname progname.o `mysql_config --libs` If an error occurs at link time that the floor symbol is undefined, link to the math library by adding -lm to the end of the compile/link line. For the MySQL C client library from a ...
https://dev.mysql.com/doc/relnotes/connector-j/en/news-8-0-22.html
(WL #13780) When trying to open multiple connections to a MySQL server using Connector/J with a named pipe on Windows systems, the attempt sometimes failed with the "All pipe instances are busy" error. Deprecation and Removal Notes Functionality ...
https://dev.mysql.com/doc/mysql-monitor/8.0/en/mem-advisors-thresholds.html
For example, the InnoDB buffer pool, MyISAM key cache, and the SQL query cache might require some time to fill up with application data, after which the cached data boosts performance. For this reason, this advisor has a second part: ... Each ...
https://dev.mysql.com/doc/mysql-monitor/8.0/en/mem-creating-advisors-overview.html
The MySQL functions LEAST(), LOCATE(), ABS(), MOD(), NOW() (returns time since Unix epoch UTC in seconds), UNIX_TIMESTAMP (technically a no-op), and INTERVAL [n] SECOND, MINUTE, HOUR, WEEK, MONTH. Comparisons with MySQL timestamps and datetimes ...