Daniel Dai created HIVE-16520:
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Summary: Cache hive metadata in metastore
Key: HIVE-16520
URL: https://issues.apache.org/jira/browse/HIVE-16520
Project: Hive
Issue Type: New Feature
Components: Metastore
Reporter: Daniel Dai
Assignee: Daniel Dai
During Hive 2 benchmark, we find Hive metastore operation take a lot of time
and thus slow down Hive compilation. In some extreme case, it takes much longer
than the actual query run time. Especially, we find the latency of cloud db is
very high and 90% of total query runtime is waiting for metastore SQL database
operations. Based on this observation, the metastore operation performance will
be greatly enhanced if we have a memory structure which cache the database
query result.
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