I have some questions about derby cache page, anyone can help me?
1. Derby writes out dirty pages through two ways:
- A background thread writes out dirty pages based on some
algorithm such as LRU.
- Checkpointing process writes out all the dirty pages.
I want to know after a dirty page has been written out, the
page will be discarded? or the status of the page will be set
as "clean"?
2. If a cache page has been updated serval times, is there any
information can indicate the log instance for every update?
or just the last update?
Thanks.
Raymond
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