hetu-core/hetu-docs/en/sql/jmx.md

JMX

Synopsis

SELECT * FROM jmx.current."table_name";

Description

All JMX metrics are stored as tables in schema current of catalog jmx. table_name must be put in quotation mark.

Users need to find the table corresponding to the jmx metrics first, and then run SELECT queries to view these metrics.

Examples

View row data cache stats:

    SELECT * FROM jmx.current."io.prestosql.orc:name=hive,type=rowdatacachestatslister";

View bloom filter cache stats:

    SELECT * FROM jmx.current."io.prestosql.orc:name=hive,type=bloomfiltercachestatslister";