To display a database summary:
In the Database Manager, in Ribbon view, on the Home tab, in the Diagnostics group, click Summary.
- Or -
In Classic view, on the Database menu, click Summary.
The Database Summary for Node dialog box appears.
The Database Summary lists the database blocks by block type. By scrolling through the list box, you can see how many blocks are used and allocated for each block type.
- Database– displays the name of the database.
- Size– indicates the number of bytes actually in use by the database.
- SN– displays the serial number of the database generated anytime a block is added to or deleted from the database. Allows you to determine if the database has been changed (by adding or deleting a database block) since you last saved it. To do this, record the serial number when you finish making changes to the database. You can later compare that number with the number displayed in the Database Summary dialog box.
- I/O Count– displays the number of allocated blocks that use I/O. The block types are AA, AI, AO, AR, BB, DA, DC, DI, DO, DR, MDI, and TX.
- Type– displays the type of block.
- Used– lists the number of blocks that exists for each block type.
- Allocated– lists the number of blocks allocated per block type. Each SCADA node automatically pre-allocates a specific number of blocks for each block type to make efficient use of memory and improve performance. The number of block allocated equals the number of blocks of one type that fits in four kilobytes of memory. Since blocks vary in size according to their type, the exact number of blocks varies for each block type.
