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https://issues.apache.org/jira/browse/FLINK-9423?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16488706#comment-16488706
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ASF GitHub Bot commented on FLINK-9423:
---------------------------------------
Github user sihuazhou commented on a diff in the pull request:
https://github.com/apache/flink/pull/6062#discussion_r190517336
--- Diff:
flink-streaming-java/src/main/java/org/apache/flink/streaming/api/operators/InternalTimer.java
---
@@ -23,8 +23,8 @@
/**
* Internal interface for in-flight timers.
*
- * @param <K> type of the timer key.
- * @param <N> type of the timer namespace.
+ * @param <K> Type of the keys to which timers are scoped. + * @param <K>
type of the timer key.
--- End diff --
Does this comment mean `@param <K> Type of the keys to which timers are
scoped.`?
> Implement efficient deletes for heap based timer service
> --------------------------------------------------------
>
> Key: FLINK-9423
> URL: https://issues.apache.org/jira/browse/FLINK-9423
> Project: Flink
> Issue Type: Improvement
> Components: Streaming
> Affects Versions: 1.6.0
> Reporter: Stefan Richter
> Assignee: Stefan Richter
> Priority: Major
>
> The current data structures in the `HeapInternalTimerService` are not able to
> support efficient timer deletes, the complexity is currently O\(n\), where n
> is the number of registered timers.
>
> We can keep track of timer's positions in the priority queue and (in
> combination with the already existing set/map) have a more efficient
> algorithm for deletes.
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