Phoenix provides metrics to understand insights during execution of a SQL query both at individual SQL and client JVM level, I want to check if there any document explaining what a each metric mean and what indicates a query execution went fine or had issues. for eg: below are the Queries in sequence that were fired using a standalone program with metrics response in a hbase cluster with phoenix Query Start Time: 2018-09-04 09:10:58,536 Query End Time: 2018-09-04 09:12:52,932 Time taken to query: ~ 2minutes Below are the phoenix metrics Mutation Write Metrings PhoenixRuntime.getWriteMetricsForMutationsSinceLastReset(connection) >>> {UPSRT_TABLE={MUTATION_COMMIT_TIME=9325278, MUTATION_BATCH_SIZE=8097788, MUTATION_BYTES=23708733912}} Mutation Read Metrings PhoenixRuntime.getReadMetricsForMutationsSinceLastReset(connection) >>> {SLET_TABLE={TASK_QUEUE_WAIT_TIME=29384207, SCAN_BYTES=17973054976, TASK_END_TO_END_TIME=41399954, TASK_EXECUTED_COUNTER=712, TASK_EXECUTION_TIME=12015738, TASK_REJECTED_COUNTER=0}} Global Metrics PhoenixRuntime.getGlobalPhoenixClientMetrics() >>> MUTATION_BATCH_SIZE :: 8097788 MUTATION_BYTES :: 23708733912 MUTATION_COMMIT_TIME :: 9325278 QUERY_TIME :: 0 NUM_PARALLEL_SCANS :: 712 SCAN_BYTES :: 17973054976 SPOOL_FILE_SIZE :: 0 MEMORY_CHUNK_BYTES :: 0 MEMORY_WAIT_TIME :: 0 TASK_QUEUE_WAIT_TIME :: 29384207 TASK_END_TO_END_TIME :: 41399954 TASK_EXECUTION_TIME :: 12015738 MUTATION_SQL_COUNTER :: 95 SELECT_SQL_COUNTER :: 0 TASK_EXECUTED_COUNTER :: 712 TASK_REJECTED_COUNTER :: 0 QUERY_TIMEOUT_COUNTER :: 0 QUERY_FAILED_COUNTER :: 0 SPOOL_FILE_COUNTER :: 0 OPEN_PHOENIX_CONNECTIONS_COUNTER :: 1 Q: How to understand below metrics TASK_QUEUE_WAIT_TIME = 29384207 milliseconds (~490 minutes) TASK_EXECUTION_TIME = 12015738 milliseconds (~200 minutes) But query itself completed in ~ 2 minutes It is also noticed that OPEN_PHOENIX_CONNECTIONS_COUNTER kept on increasing by 10 for each of the Query that is fired subsequently i.e. "OPEN_PHOENIX_CONNECTIONS_COUNTER = 11" , "OPEN_PHOENIX_CONNECTIONS_COUNTER = 21 " etc.,though there were no other noticeable logs indicating some error, w hat does this mean? ... View more