Liu created FLINK-11050:
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Summary: When IntervalJoin, get left or right buffer's entries
more quickly by assigning lowerBound
Key: FLINK-11050
URL: https://issues.apache.org/jira/browse/FLINK-11050
Project: Flink
Issue Type: Improvement
Components: State Backends, Checkpointing
Affects Versions: 1.7.0, 1.6.2
Reporter: Liu
Fix For: 1.7.1
When IntervalJoin, it is very slow to get left or right buffer's entries.
Because we have to scan all buffer's values, including the deleted values which
are out of time range. These deleted values's processing consumes too much time
in RocksDB's level 0. Since lowerBound is known, it can be optimized by seek
from the timestamp of lowerBound.
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