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Posted to issues-all@impala.apache.org by "Joe McDonnell (Jira)" <ji...@apache.org> on 2023/03/23 17:10:00 UTC

[jira] [Created] (IMPALA-12022) Keep metrics about wait times for metastoreDdlLock_

Joe McDonnell created IMPALA-12022:
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             Summary: Keep metrics about wait times for metastoreDdlLock_
                 Key: IMPALA-12022
                 URL: https://issues.apache.org/jira/browse/IMPALA-12022
             Project: IMPALA
          Issue Type: Improvement
          Components: Catalog
    Affects Versions: Impala 4.3.0
            Reporter: Joe McDonnell


CatalogOpExecutor's metastoreDdlLock_ is used to synchronize operations to create/drop objects in HMS with the local state of the catalog. If the HMS is slow for any reason, threads doing create/drop operations will end up blocking on metastoreDdlLock_. It would be useful to keep track of the time spent waiting on this lock, as a high value could indicate HMS slowness.



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