运行如下语句可以查看集群 SQL 请求流量是否均衡：

    1. obclient>SELECT/*+ PARALLEL(15)*/t2.zone, t1.svr_ip,  COUNT(*) AS QPS,  
    2.       AVG(t1.elapsed_time), AVG(t1.queue_time)  
    3.       FROM oceanbase.gv$sql_audit t1, __all_server t2  
    4.       WHERE t1.svr_ip = t2.svr_ip AND IS_EXECUTOR_RPC = 0    
    5.       AND request_time > (time_to_usec(now()) - 1000000)    
    6.       AND request_time < time_to_usec(now())
    7.       GROUP BY t1.svr_ip  ORDER BY t2.zone;
    9. +--------+----------------+------+----------------------+--------------------+
    10. | zone   | svr_ip         | QPS  | avg(t1.elapsed_time) | avg(t1.queue_time) |
    11. +--------+----------------+------+----------------------+--------------------+
    12. | ET2_1  | 10.103.224.119 |  379 |            5067.3034 |            33.7071 |
    13. | ET2_1  | 10.103.226.124 |  507 |            5784.1538 |            12.5878 |
    14. | ET2_1  | 10.103.228.177 |  370 |            5958.2162 |            10.9811 |
    15. | ET2_1  | 10.103.229.107 |  356 |            5730.9972 |            39.4185 |
    16. | ET2_1  | 10.103.229.94  |  369 |            5851.7886 |            64.9621 |
    17. | EU13_2 | 10.183.78.113  |  354 |            6182.6384 |            11.3107 |
    18. | EU13_2 | 10.183.78.86   |  349 |            5881.3209 |            10.7393 |
    19. | EU13_2 | 10.183.79.56   |  347 |            5936.0144 |            11.9049 |
    20. | EU13_2 | 10.183.85.152  |  390 |            5988.4846 |            12.0487 |
    21. | EU13_3 | 10.183.76.140  |  284 |            5657.2218 |            11.7993 |
    22. | EU13_3 | 10.183.78.165  |  372 |            5360.6989 |            11.6290 |
    23. | EU13_3 | 10.183.79.198  |  416 |            4154.2861 |            12.2524 |
    24. | EU13_3 | 10.183.86.65   |  446 |            6487.6009 |            24.5112 |
    25. | EU13_3 | 11.180.113.7   |  364 |            5444.4203 |            12.3462 |
    26. +--------+----------------+------+----------------------+--------------------+