Run ^DBSIZE Interactively

The following procedure describes the steps necessary to run ^DBSIZE interactively:

Open the Terminal and run the utility from the %SYS namespace:
```
%SYS>Do ^DBSIZE
```

InterSystems IRIS displays the ^DBSIZE main menu:

               Incremental Backup Size Estimator
 
 
What kind of backup:
   1. Full backup of all in-use blocks
   2. Incremental since last backup
   3. Cumulative incremental since last full backup
   4. Exit the backup program
1 =>

Enter the appropriate menu option to select the type of backup for which you want an estimate: full, incremental, or cumulative. The prompts are the same for each type.
At the following prompt either press Enter to suspend updates so that you get a more accurate estimate or enter No to allow updates:
```
Suspend Updates?  Yes=>
```
If you choose to suspend updates, you receive the following message:
```
WARNING: Switch is set and may affect production for up to 30 seconds.
Waiting for disk cleanup to finish... ready.
```

The output first shows you how many InterSystems IRIS blocks you need to do the type of backup you selected. It shows an estimate for each directory in the backup list and a total. The following is an example of the display for a full backup:


                                                     In-Use    Block
Directory                                            Blocks    Size

c:\iris-install\mgr\                                  19,963   (8KB)
c:\iris-install\mgr\irisaudit\                           189   (8KB)
c:\iris-install\mgr\user\                                 61   (8KB)
                                                      --------------
 Total number of database blocks:                     36,228

The display for an incremental and cumulative backup looks similar to this:


                                                     Modified  Block
Directory                                            Blocks    Size
 
c:\iris-install\mgr\                                       5   (8KB)
c:\iris-install\mgr\irisaudit\                             3   (8KB)
c:\iris-install\mgr\user\                                  1   (8KB)
                                                    - --------------
Total number of database blocks:                          10

The utility then displays information about backup disk file space:

Total backup size, including overhead of volume and pass labels:
 
     For a disk file:
          Number of 512-byte blocks:  598,092  (306,223,104 bytes)

Use the ^DBSIZE Function