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https://issues.apache.org/jira/browse/FLINK-11852?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16786624#comment-16786624
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chunpinghe commented on FLINK-11852:
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you are right,it's meaningful!
> Improve Processing function example
> -----------------------------------
>
> Key: FLINK-11852
> URL: https://issues.apache.org/jira/browse/FLINK-11852
> Project: Flink
> Issue Type: Improvement
> Components: Documentation
> Affects Versions: 1.7.2
> Reporter: Flavio Pompermaier
> Priority: Minor
>
> In the processing function documentation
> ([https://ci.apache.org/projects/flink/flink-docs-stable/dev/stream/operators/process_function.html)]
> there's an "abusive" usage of the timers since a new timer is registered for
> every new tuple coming in. This could cause problems in terms of allocated
> objects and could burden the overall application.
> It could worth to mention this problem and remove useless timers, e.g.:
>
> {code:java}
> CountWithTimestamp current = state.value();
> if (current == null) {
> current = new CountWithTimestamp();
> current.key = value.f0;
> } else {
> ctx.timerService().deleteEventTimeTimer(current.lastModified + timeout);
> }{code}
>
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