The buf-map BASIC program displays a visual map of the file system, indicating which frames are currently being held in the RAM buffer area, and updates the display every few seconds.
For Windows: Not Supported
The buffer map is laid out as a grid of frame addresses for the entire system (bottom left-hand corner is minfid and top right-hand corner is maxfid), and displays which FIDs are currently active in the buffers.
The buffer displays a number between 0 through 7, which indicates the buffer’s state. The values are shown in the upper right-hand corner as a reminder.
buf-map {minfid-maxfid} {(options)}
| minfid | Lowest FID number to be included in the result. | |
| maxfid | Highest FID number to be included in the result. | |
| options | s | Samples about 10% of the memory, rather than reading all buffers in memory. This option provides a quick snapshot of the memory usage, but is less accurate. |
buf-map 1-358398. fid loaded : 8740. 8742 buffers. Type H for help. - - - - - - - - - - - - - - - - - - - - - - - 1 : 5 : R 2265 2 : W 6 : RW 3 : B 7 : RB 6 4 : BW 8 : RCW 6 - - - - - - - - - - - - - - - - - - - - 5 6 1700 5 5 5 5 5 5 5 - - - - - - - - - - - - - - - - - - 5 1135 5 5 5 5 5 - - - - - - - - - - - - - - - - - - 5 -570 5 56 5 1 5 56 5 11 5 16 5 5111 15 +- - - -+- - - -+ - - - -+ - - - - +- - - -+- - - - + Range 1 to 358398. Press X to stop.. 0000
The diagram above displays the different states of the buffers in memory by a number displayed in the state table below.
With the s option, only a sample is taken.
Refer’cd Batch Write-req State 0 0 0 1 Available 0 0 1 2 0 1 0 3 Available 0 1 1 4 1 0 0 5 1 0 1 6 1 1 0 7 1 1 1 8
During the sampling, enter one of these options:
| h | Displays this screen. |
| s | Stops sampling and display results. |
| x | Exits the process. |