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https://dev.mysql.com/doc/refman/5.7/en/information-schema-table-reference.html
The following table summarizes all available INFORMATION_SCHEMA tables. For greater detail, see the individual table descriptions. Table 24.1 INFORMATION_SCHEMA Tables Table Name Description Introduced Deprecated CHARACTER_SETS Available character ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-auto-increment-handling.html
The exception is for “mixed-mode inserts”, where the user provides explicit values for an AUTO_INCREMENT column for some, but not all, rows in a multiple-row “simple insert”. Specifying NULL or 0 for the AUTO_INCREMENT column In all lock ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-buffer-pool.html
A page can be read because it is required for a user-initiated operation such as an SQL query, or as part of a read-ahead operation performed automatically by InnoDB. If the page was read because it was required by a user-initiated operation, the ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-compression-tuning.html
In addition to user data, the page format includes some internal system data that is not compressed. This is often especially the case when running in a multi-user environment with fast, multi-core CPUs. Most often, the internal optimizations ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-file-format-compatibility-checking-table-access.html
All tables using any file format supported by a release can be read or written (assuming the user has sufficient privileges). Users are strongly urged not to use database files that contain Barracuda file format tables with releases of InnoDB older ... When a table is first accessed, InnoDB (including some releases prior to InnoDB 1.0) checks that the file format of the tablespace in which the table is stored is fully ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-file-space.html
Whether the freed space becomes available for other users depends on whether the pattern of deletes frees individual pages or extents to the tablespace. Dropping a table or deleting all rows from it is guaranteed to release the space to other users, ... The data files that you define in the configuration file using the innodb_data_file_path configuration option form the InnoDB system ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-information-schema-fulltext_index-tables.html
The VALUE column is empty if there is no user-defined stopword table. INNODB_FT_BEING_DELETED: Provides a snapshot of the INNODB_FT_DELETED table; it is used only during an OPTIMIZE TABLE maintenance operation. When OPTIMIZE TABLE is run, the ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-information-schema-system-tables.html
The first index is GEN_CLUST_INDEX, which is a clustered index created by InnoDB if the table does not have a user-defined clustered index. You can extract metadata about schema objects managed by InnoDB using InnoDB INFORMATION_SCHEMA system ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-introduction.html
Key Advantages of InnoDB Its DML operations follow the ACID model, with transactions featuring commit, rollback, and crash-recovery capabilities to protect user data. Row-level locking and Oracle-style consistent reads increase multi-user ... InnoDB ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-locking-reads.html
Here, LOCK IN SHARE MODE is not a good solution because if two users read the counter at the same time, at least one of them ends up in deadlock when it attempts to update the counter. If you query data and then insert or update related data within ...