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Posted to issues@impala.apache.org by "Yida Wu (Jira)" <ji...@apache.org> on 2022/12/07 22:22:00 UTC

[jira] [Created] (IMPALA-11782) Reduce size for each codegen cache entry in NORMAL mode

Yida Wu created IMPALA-11782:
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             Summary: Reduce size for each codegen cache entry in NORMAL mode
                 Key: IMPALA-11782
                 URL: https://issues.apache.org/jira/browse/IMPALA-11782
             Project: IMPALA
          Issue Type: Improvement
          Components: Backend
            Reporter: Yida Wu


We added support for codegen cache in IMPALA-11470, however in NORMAL mode, the size of each codegen cache entry is large because the key we use is the bitcode of the whole llvm module which is very large, one possible solution is to use the query plan plus other elements which could affect the codegen functions to be the key, from the prototype, it can reduce the cache size significantly, but one thing we need to confirm is the safety of using such keys.



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