The _ActSpace VST displays space allocation information, including the number of database extends, the number of times a block was used from and returned to the free chain, the number of times space was allocated for a record (from the rm chain or from the free chain) the number of bytes allocated for record fragments, the number of rm blocks examined or removed, the number of blocks added to the front or back of the rm chain, the number of moved blocks, the number of locked chain entries, the number of transactions committed, and database up time.1

Field name Data type Description
_Space-AllocNewRm INT64 Number of times space was allocated for a record or record fragment
_Space-BackAdd INT64 Number of blocks added to the back of the rm chain
_Space-BytesAlloc INT64 Number of bytes allocated for record fragments
_Space-DbExd INT64 Number of times the database was extended
_Space-Examined INT64 Number of blocks examined in the rm chain while looking for space for a record fragment
_Space-FromFree INT64 Number of times space was allocated from the free chain
_Space-FromRm INT64 Number of times space was allocated from the rm chain
_Space-Front2Back INT64 Number of blocks moved from the front to the back of the rm chain
_Space-FrontAdd INT64 Number of blocks added to the front of the rm chain
_Space-Locked INT64 Number of locked rm entries removed
_Space-Removed INT64 Number of blocks removed from the rm chain
_Space-RetFree INT64 Number of times a block was returned to the free chain
_Space-TakeFree INT64 Number of times a block was used from the free chain
_Space-Trans INT64 Number of transactions committed
_Space-UpTime INTEGER Number of seconds the database was up