Jufang He created FLINK-34386:
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Summary: Add RocksDB bloom filter metrics
Key: FLINK-34386
URL: https://issues.apache.org/jira/browse/FLINK-34386
Project: Flink
Issue Type: Improvement
Components: Runtime / State Backends
Affects Versions: 1.18.0
Reporter: Jufang He
In our production environment，with RocksDB bloom filter enabled, the
performance optimization effect on task state reading is obvious. However,
there is a lack of usage metrics for bloom filter, If these Metrics are
reported via Metrics reporter, it is easy to monitor the effectiveness of bloom
filter optimization.
And these metrics are available from rocksdb Statistics:
BLOOM_FILTER_USEFUL: times bloom filter has avoided file reads.
BLOOM_FILTER_FULL_POSITIVE: times bloom FullFilter has not avoided the reads.
BLOOM_FILTER_FULL_TRUE_POSITIVE: times bloom FullFilter has not avoided the
reads and data actually exist.
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