[jira] [Created] (FLINK-16038) Expose hitRate metric for JDBCLookupFunction

[Shang Yuanchun (Jira)]

Benchao Li created FLINK-16038:
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             Summary: Expose hitRate metric for JDBCLookupFunction
                 Key: FLINK-16038
                 URL: https://issues.apache.org/jira/browse/FLINK-16038
             Project: Flink
          Issue Type: Improvement
          Components: Connectors / JDBC
    Affects Versions: 1.10.0
            Reporter: Benchao Li


{{hitRate}} is a key metric for a cache. Exposing {{hitRate}} for {{JDBCLookupFunction}} can give users an intuitive understanding about the cache stat.

cc [~lzljs3620320] [~jark]



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