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Posted to dev@flink.apache.org by "Zou (Jira)" <ji...@apache.org> on 2022/07/26 10:35:00 UTC

[jira] [Created] (FLINK-28691) Improve cache hit rate of generated class

Zou created FLINK-28691:
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             Summary: Improve cache hit rate of generated class
                 Key: FLINK-28691
                 URL: https://issues.apache.org/jira/browse/FLINK-28691
             Project: Flink
          Issue Type: Sub-task
          Components: Table SQL / Runtime
            Reporter: Zou


In OLAP scenarios, compiling generated classes is very frequent, it will consume a lot of CPU and large amount of generated classes will also takes up a lot of space in metaspace, which will lead to frequent Full GC.

As we use a self-incrementing counter in CodeGenUtils#newName, it means we could not get the same generated class between two queries even when they are exactly the same. Maybe we could share the same generated class between different queries if they has the same logic, it will be good for job latency and resource consumption. 



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