Li Zhiming created KUDU-3181:
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Summary: Compilation manager queue may have too many tasks
Key: KUDU-3181
URL: https://issues.apache.org/jira/browse/KUDU-3181
Project: Kudu
Issue Type: Bug
Components: codegen
Reporter: Li Zhiming
Attachments: heap.svg
When a client frequently scanning for thousands of diffrent columns, the
code_cache_hits rate is quite low. Then compilation task is frequently
submitted to queue, but the compiler manager thread cannot consumes the queue
quick enough. The queue could accumulate tons of entries, each of which retains
a copy of schema meta data, so a lot of memeory is consumed for a long time.
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