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https://dev.mysql.com/doc/refman/8.0/en/innodb-check-availability.html
Issue the SHOW ENGINES statement to view the available MySQL storage engines.
https://dev.mysql.com/doc/refman/8.0/en/innodb-compression-internals.html
This section describes some internal implementation details about compression for InnoDB tables. The information presented here may be helpful in tuning for performance, but is not necessary to know for basic use of compression. Compression ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-file-defragmenting.html
Another symptom of fragmentation is that a table scan such as this takes more time than it “should” take: SELECT COUNT(*) FROM t WHERE non_indexed_column <> 12345; The preceding query requires MySQL to perform a full table scan, the slowest type ... Random insertions into or deletions from a secondary index can cause the index to become ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-information-schema-understanding-innodb-locking.html
When a transaction updates a row in a table, or locks it with SELECT FOR UPDATE, InnoDB establishes a list or queue of locks on that row. Note This section describes locking information as exposed by the Performance Schema data_locks and ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-memcached-ddl.html
You can access the underlying InnoDB table (which is test.demo_test by default) through standard SQL interfaces. However, there are some restrictions: When querying a table that is also accessed through the memcached interface, remember that ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-memcached-dml.html
Benchmarks suggest that the daemon_memcached plugin speeds up DML operations (inserts, updates, and deletes) more than it speeds up queries. Therefore, consider focussing initial development efforts on write-intensive applications that are ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-memcached-txn.html
mysql> SELECT * FROM innodb_memcache.cache_policies; +--------------+-------------+-------------+---------------+--------------+ | policy_name | get_policy | set_policy | delete_policy | flush_policy | ... Unlike traditional memcached, the ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-moving-data-files-offline.html
To view tablespace file locations, query the Information Schema FILES table: mysql> SELECT TABLESPACE_NAME, FILE_NAME FROM INFORMATION_SCHEMA.FILES \G . The innodb_directories variable, which defines directories to scan at startup for tablespace ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-purge-configuration.html
Running a SELECT query after disabling autocommit, and forgetting to issue an explicit COMMIT or ROLLBACK. InnoDB does not physically remove a row from the database immediately when you delete it with an SQL statement. A row and its index records ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-troubleshooting-datadict.html
mysql> SELECT COUNT(*) FROM sakila.actor; +----------+ | count(*) | +----------+ | 200 | +----------+ . Information about table definitions is stored in the InnoDB data dictionary. If you move data files around, dictionary data can become ...