Sihua Zhou created FLINK-8639:
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Summary: Fix always need to seek multiple times when iterator
RocksDBMapState
Key: FLINK-8639
URL: https://issues.apache.org/jira/browse/FLINK-8639
Project: Flink
Issue Type: Improvement
Components: State Backends, Checkpointing
Affects Versions: 1.4.0
Reporter: Sihua Zhou
Assignee: Sihua Zhou
Fix For: 1.5.0
Currently, almost every time we want to iterator a RocksDBMapState we need to
do seek at least 2 times (Seek is a poor performance action for rocksdb cause
it can't use the bloomfilter). This is because `RocksDBMapIterator` use a
`cacheEntries` to cache the seek values every time and the `cacheEntries`'s
init size is 1.
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