DATASTATISTICSRESET 
The system table SYSINFO.DATASTATISTICSRESET describes the current fill level of the database and the maximum fill level since the last RESET ALL STATISTICS or RESET DATASTATISTICS.
Structure
RESETDATE |
TIMESTAMP |
Time of the last RESET for these entries |
USABLESIZE |
FIXED(20) |
Data area available for data (KB) |
MAXUSEDSIZE |
FIXED(20) |
Maximum data area used for data at a savepoint (KB) |
MAXUSEDPERMANENTSIZE |
FIXED(20) |
Maximum data area used for permanent data at a savepoint (KB) |
MAXUSEDTEMPORARYSIZE |
FIXED(20) |
Maximum data area used for temporary data at a savepoint (KB) |