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https://issues.apache.org/jira/browse/FLINK-34386?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17814681#comment-17814681
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Jufang He commented on FLINK-34386:
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[~pnowojski] could you take a look at this?
> 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
> Priority: Major
>
> 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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