Lists the Myisam configuration metrics and provides a brief description of each.
Table 5.16 Myisam Configuration Metrics
| Name | Description |
|---|---|
| Concurrent Insert (Total) | Permits INSERT and SELECT statements to run concurrently for MyISAM tables that have no free blocks in the middle of the data file. |
| Delay Key Write (Total) | Delayed key writing causes key buffers not to be flushed between writes for MyISAM tables. |
| Keep Files On Create Enabled (Total) | Whether to overwrite MyISAM MYD/MYI files or return an error if no DATA DIRECTORY / INDEX DIRECTORY option is set, and the files already exist. |
| Key Buffer Size (Total) | The size of the buffer used for MyISAM index blocks. |
| Key Cache Age Threshold (Total) | Controls the demotion of buffers from the hot sublist of a MyISAM key cache to the warm sublist. |
| Key Cache Block Size (Total) | The size in bytes of blocks in the MyISAM key cache. |
| Key Cache Division Limit (Total) | The division point between the hot and warm sublists of the MyISAM key cache buffer list. |
| Myisam Data Pointer Size (Total) | The default pointer size, in bytes, to be used by CREATE TABLE for MyISAM tables when no MAX_ROWS option is specified. |
| Myisam Max Sort File Size (Total) | The maximum size of the temporary file that MySQL is permitted to use while re-creating a MyISAM index (during REPAIR TABLE, ALTER TABLE, or LOAD DATA INFILE). |
| Myisam Mmap Size (Total) | The maximum amount of memory to use for memory mapping compressed MyISAM files. |
| Myisam Recover Options (Total) | Sets the MyISAM storage engine recovery mode. |
| Myisam Repair Threads (Total) | If this value is greater than 1, MyISAM table indexes are created in parallel (each index in its own thread) during the Repair by sorting process. |
| Myisam Sort Buffer Size (Total) | The size of the buffer that is allocated when sorting MyISAM indexes during a REPAIR TABLE or when creating indexes with CREATE INDEX or ALTER TABLE. |
| Myisam Stats Method (Total) | How the server treats NULL values when collecting statistics about the distribution of index values for MyISAM tables. |
| Myisam Use Mmap Enabled (Total) | Use memory mapping for reading and writing MyISAM tables. |
| Skip External Locking Enabled (Total) | Do not use external locking (system locking) to lock MyISAMtable files. |