Jesus Camacho Rodriguez created HIVE-18259:
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Summary: Automatic cleanup of invalidation cache for materialized
views
Key: HIVE-18259
URL: https://issues.apache.org/jira/browse/HIVE-18259
Project: Hive
Issue Type: Improvement
Components: Materialized views
Affects Versions: 3.0.0
Reporter: Jesus Camacho Rodriguez
Assignee: Jesus Camacho Rodriguez
HIVE-14498 introduces the invalidation cache for materialized views, which
keeps track of the transactions executed on a given table to infer whether
materialized view contents are outdated or not.
Currently, the cache keeps information of transactions in memory to guarantee
quick response time, i.e., quick resolution about the view freshness, at query
rewriting time. This information can grow large, thus we would like to run a
thread that cleans useless transactions from the cache, i.e., transactions that
do invalidate any materialized view in the system, at an interval defined by a
property.
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