lordcheng10 opened a new pull request #14985:
URL: https://github.com/apache/pulsar/pull/14985
### Motivation
We found a problem: even if we adjusted the cache eviction size and time a
lot, there would still be some misscaches when the client restarted.
The current cache eviction strategy is to evict according to the read
position, so there may be a miss cache when the data is pushed again.
In our scenario, there are tens of thousands of clients, and they are
deployed on k8s. In order to save resources, they may dynamically expand or
shrink, so that data re-pushing will happen from time to time.
### Modifications
Therefore, to improve the cache hit rate , I think a new cache eviction
strategy should be added: evict data according to the markdelete position.
### Documentation
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privilege).
Need to update docs?
- [ ] `doc-required`
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- [x] `no-need-doc`
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- [ ] `doc`
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