Check whether SQL queries are balanced across servers in a cluster

obclient> SELECT/*+ PARALLEL(15)*/t2.zone, t1.svr_ip,  COUNT(*) AS QPS,  
      AVG(t1.elapsed_time), AVG(t1.queue_time)  
      FROM oceanbase.GV$OB_SQL_AUDIT t1, __all_server t2  
      WHERE t1.svr_ip = t2.svr_ip AND IS_EXECUTOR_RPC = 0    
      AND request_time > (time_to_usec(now()) - 1000000)    
      AND request_time < time_to_usec(now())
      GROUP BY t1.svr_ip  ORDER BY t2.zone;

+--------+----------------+------+----------------------+--------------------+
| zone   | svr_ip         | QPS  | avg(t1.elapsed_time) | avg(t1.queue_time) |
+--------+----------------+------+----------------------+--------------------+
| ET2_1  | 10.10.10.1     |  379 |            5067.3034 |            33.7071 |
| ET2_1  | 10.10.10.2     |  507 |            5784.1538 |            12.5878 |
| ET2_1  | 10.10.10.3     |  370 |            5958.2162 |            10.9811 |
| ET2_1  | 10.10.10.4     |  356 |            5730.9972 |            39.4185 |
| ET2_1  | 10.10.10.5     |  369 |            5851.7886 |            64.9621 |
| EU13_2 | 10.10.10.6     |  354 |            6182.6384 |            11.3107 |
| EU13_2 | 10.10.10.7     |  349 |            5881.3209 |            10.7393 |
| EU13_2 | 10.10.10.8     |  347 |            5936.0144 |            11.9049 |
| EU13_2 | 10.10.10.9     |  390 |            5988.4846 |            12.0487 |
| EU13_3 | 10.10.10.10    |  284 |            5657.2218 |            11.7993 |
| EU13_3 | 10.10.10.11    |  372 |            5360.6989 |            11.6290 |
| EU13_3 | 10.10.10.12    |  416 |            4154.2861 |            12.2524 |
| EU13_3 | 10.10.10.13    |  446 |            6487.6009 |            24.5112 |
| EU13_3 | 10.10.10.14    |  364 |            5444.4203 |            12.3462 |
+--------+----------------+------+----------------------+--------------------+