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https://dev.mysql.com/doc/refman/8.0/en/monitor-innodb-mutex-waits-performance-schema.html
For example, to disable InnoDB mutex wait event instruments related to full-text search, add the following rule: performance-schema-instrument='wait/synch/mutex/innodb/fts%=OFF' Note Rules with a longer prefix such as wait/synch/mutex/innodb/fts% ...
https://dev.mysql.com/doc/refman/8.0/en/myisamchk-other-options.html
This improves join performance by enabling the join optimizer to better choose the order in which to join the tables and which indexes it should use. --block-search=offset, -b offset Command-Line Format --block-search=offset Type Numeric Find the ...
https://dev.mysql.com/doc/refman/8.0/en/optimize-table.html
To keep the index maintenance period to a reasonable time, set the innodb_ft_num_word_optimize option to specify how many words to update in the search index, and run a sequence of OPTIMIZE TABLE statements until the search index is fully updated.
https://dev.mysql.com/doc/refman/8.0/en/optimizer-features-to-trace.html
They are: Greedy search: With an N-table join, this could explore factorial(N) plans. These switches are listed here: greedy_search: Greedy search is not traced. dynamic_range: Only the first call to the range optimizer on this JOIN_TAB::SQL_SELECT ... Some features in the optimizer can be invoked many times during statement optimization and execution, and thus can make the trace grow beyond ...
https://dev.mysql.com/doc/refman/8.0/en/string-comparison-functions.html
To search for \, specify it as \\\\; this is because the backslashes are stripped once by the parser and again when the pattern match is made, leaving a single backslash to be matched against. This differs from comparisons performed with the = ...
https://dev.mysql.com/doc/refman/8.0/en/faqs-mysql-cluster.html
See MySQL Cluster Manager 8.0.43 User Manual, for more information about this tool. When I run the SHOW command in the NDB Cluster management client, I see a line of output that looks like this: A.10.8. The loading process terminates prematurely and ... In the following section, we answer questions that are frequently asked about MySQL NDB Cluster and the NDB storage ...
https://dev.mysql.com/doc/refman/8.0/en/partitioning-limitations.html
As discussed elsewhere in this Manual (see Section 7.1.11, “Server SQL Modes”), the results of many MySQL functions and operators may change according to the server SQL mode. This section discusses current restrictions and limitations on MySQL ...The following constructs are not permitted in partitioning expressions: Stored procedures, stored functions, loadable functions, or ...
https://dev.mysql.com/doc/refman/8.0/en/replication-administration-skip.html
For instructions to do this, see Section 9.5, “Point-in-Time (Incremental) Recovery”. Does the transaction that stopped replication need to be applied on the replica? If so, either make the appropriate corrections and reapply the transaction, or ... If replication stops due to an issue with an event in a replicated transaction, you can resume replication by skipping the failed transaction on the ...
https://dev.mysql.com/doc/refman/8.0/en/xml-functions.html
Some basic information about XPath syntax and usage is provided later in this section; however, an in-depth discussion of these topics is beyond the scope of this manual, and you should refer to the XML Path Language (XPath) 1.0 standard for ...Note ...
https://dev.mysql.com/doc/refman/8.0/en/solaris-installation.html
Check the notes and hints at the end of this section for Solaris specific notes that you may need before or after installation. Note MySQL 5.7 has a dependency on the Oracle Developer Studio Runtime Libraries; but this does not apply to MySQL 8.0.