lordcheng10 commented on a change in pull request #13679:
URL: https://github.com/apache/pulsar/pull/13679#discussion_r826545913
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File path:
managed-ledger/src/main/java/org/apache/bookkeeper/mledger/impl/EntryCacheManager.java
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@@ -45,9 +45,9 @@
@SuppressWarnings("checkstyle:javadoctype")
public class EntryCacheManager {
- private final long maxSize;
- private final long evictionTriggerThreshold;
- private final double cacheEvictionWatermark;
+ private volatile long maxSize;
+ private volatile long evictionTriggerThreshold;
+ private volatile double cacheEvictionWatermark;
Review comment:
> I am concerned about the cost of this change. These three variables
are read each time that a message is written to the cache. While I see the
generic benefit of increasing configurability, I don't think we should do so in
a way that adds cost (even small costs) to the write path.
Do you have some good ideas? Regarding the need to provide a dynamic
configuration cache, but also to solve the problems you mentioned.
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