https://dev.mysql.com/innodb-row-format.html
Tables that use the REDUNDANT row format store the first 768 bytes of variable-length column values (VARCHAR, VARBINARY, and BLOB and TEXT types) in the index record within the B-tree node, with the remainder stored on overflow pages. This works ...
https://dev.mysql.com/memory-use.html
For each concurrent thread, a table structure, column structures for each column, and a buffer of size 3 * N are allocated (where N is the maximum row length, not counting BLOB columns). A BLOB column requires five to eight bytes plus the length of ... MySQL allocates buffers and caches to improve performance of database ...
https://dev.mysql.com/innodb-buffer-page-lru-table.html
The INNODB_BUFFER_PAGE_LRU table provides information about the pages in the InnoDB buffer pool; in particular, how they are ordered in the LRU list that determines which pages to evict from the buffer pool when it becomes full. The ...
https://dev.mysql.com/innodb-buffer-page-table.html
The INNODB_BUFFER_PAGE table provides information about each page in the InnoDB buffer pool. For related usage information and examples, see Section 15.14.5, “InnoDB INFORMATION_SCHEMA Buffer Pool Tables”. Do not query this table on a ...
https://dev.mysql.com/mysql-cluster-programs-ndb-restore.html
All NDB 8.0 releases --rewrite-database=olddb,newdb Restores to a database with a different name than the original All NDB 8.0 releases --skip-broken-objects Causes missing blob tables in the backup file to be ignored. When converting between ...
https://dev.mysql.com/c-api-data-structures.html
(The BLOB_FLAG and TIMESTAMP_FLAG flags are unneeded.) ENUM and SET values are returned as strings. This enables you to distinguish BINARY from CHAR, VARBINARY from VARCHAR, and the BLOB types from the TEXT types. This section describes C API data ...
https://dev.mysql.com/mysql-cluster-ndbinfo-operations-per-fragment.html
This currently has the following formats: Base table: - DbName/def/TblName BLOB table: - DbName/def/NDB$BLOB_BaseTblId_ColNo Ordered index: - sys/def/BaseTblId/IndexName Unique index: - sys/def/BaseTblId/IndexName$unique The $unique suffix shown for ... The operations_per_fragment table provides information about the operations performed on individual fragments and fragment replicas, as well as about some of the results from these ...
https://dev.mysql.com/storage-requirements.html
This figure excludes BLOB or TEXT columns, which contribute only 9 to 12 bytes toward this size. For BLOB and TEXT data, the information is stored internally in a different area of memory than the row buffer. VARCHAR, VARBINARY, and the BLOB and ...
https://dev.mysql.com/data-type-defaults.html
The BLOB, TEXT, GEOMETRY, and JSON data types cannot be assigned a default value. Data type specifications can have explicit or implicit default values. A DEFAULT value clause in a data type specification explicitly indicates a default value for a ...
https://dev.mysql.com/glossary.html
off-page column A column containing variable-length data (such as BLOB and VARCHAR) that is too long to fit on a B-tree page. overflow page Separately allocated disk pages that hold variable-length columns (such as BLOB and VARCHAR) that are too ...
