Ted Yu created FLINK-6359:
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Summary: Utilize Hierarchical Timing Wheels for performant timer
Key: FLINK-6359
URL: https://issues.apache.org/jira/browse/FLINK-6359
Project: Flink
Issue Type: Improvement
Reporter: Ted Yu
In this thread on mailing list:
http://search-hadoop.com/m/Flink/VkLeQPmRa31hd5cw
Gyula Fóra mentioned that timer deletion becomes performance bottleneck due to
the usage of priority queue.
Benjamin has an implementation for Hierarchical Timing Wheels (Apache License) :
https://github.com/ben-manes/caffeine/blob/master/caffeine/src/main/java/com/github/benmanes/caffeine/cache/TimerWheel.java
{code}
* A hierarchical timer wheel to add, remove, and fire expiration events in
amortized O(1) time. The
* expiration events are deferred until the timer is advanced, which is
performed as part of the
* cache's maintenance cycle.
{code}
We should consider porting the above over to facilitate performant timer.
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