These columns further identify file system cylinder split/migrate (CylMigr) overhead performed when cylinders can not accommodate new data.
Only logical I/Os and the amount moved (KB) for data blocks are identified. Each cylinder migration event implies one logical read and three logical writes of the cylinder index. Only permanent tables (including append and transient journal tables) are migrated.
|Column Name||Mode||Description||Data Type|
|FileDbCylMigrKB||count||KB moved by FileDbCylMigrIOs.||FLOAT|
|FileDbCylMigrIO||count||Number of data block logical I/Os due to cylinder migration.||FLOAT|