Release 10.1A: OpenEdge Data Management:
Database Administration
Buffer Cache
Displays status information about buffers. Figure 19–22 shows a sample Buffer Cache Status display.
Figure 19–22: PROMON Buffer Cache Status display
The display contains the following fields:
- Total buffers — The total number of buffers in the buffer cache.
- Hash Table Size — The size of the buffer hash table.
- Used Buffers — The number of buffers currently in use.
- Empty Buffers — The number of empty buffers.
- On lru Chain — The number of buffers on the least recently used (LRU) chain.
- On apw queue — The number of buffers on the page writer queue.
- On ckp queue — The number of buffers on the checkpoint queue.
- Modified buffers — The number of dirty (modified) buffers.
- Marked for ckp — The number of buffers currently marked for checkpoint.
- Last checkpoint number — The most recent checkpoint number. As checkpoints begin, they are assigned a sequential number from the start of the session. The number is also the number of checkpoints that have occurred.
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