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From yunfan123 <yunfanfight...@foxmail.com>
Subject Flink takes too much memory in record serializer.
Date Tue, 14 Nov 2017 10:11:24 GMT
In the class org.apache.flink.runtime.io.network.api.writer.RecordWriter, it
has same number of serializers with the numChannels.
If I first operator has 500 parallels and the next operator has 1000
parallels.
And every message in flink is 2MB.
The job takes 500 * 1000 * 2MB as 1TB memory in totally!!!
Can I do anything to reduce the memory usage.



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