# 国家中心clickhouse服务器产生OLAP Asset High Disk IO Utilization > 90%告警

| ID | Creation Date | Assignee | Status |
|----|----------------|----------|--------|
| OMPUB-1445 | 2024-09-02T20:04:33.000+0800 | 张洪庆 | 已关闭 |


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**zhanghongqing** commented on *2024-09-05T19:21:50.210+0800*:

操作：
  2024.9.4号修改Flink session record写入clickhouse任务批量参数，将batch.size: 100000 改为 batch.size: 200000
结果：   

   2024.9.5号监控到在相同时间段流量峰值，clickhouse服务器磁盘IO下降20%，基本在70%以下，并未再出现 Disk IO Utilization > 90%告警。将在观察一段时间。如果稳定将关闭bug。

clickhouse服务器流量监控：

!image-2024-09-05-19-19-42-091.png|width=1236,height=325!

clickhouse服务器IO监控：

!image-2024-09-05-19-14-50-369.png!



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**zhanghongqing** commented on *2024-09-06T14:28:36.897+0800*:

clickhouse流量监控：
!image-2024-09-06-14-22-22-604.png|width=947,height=276!
clickhouseIO监控：
!image-2024-09-06-14-24-12-603.png!
2024.09.06 clickhouse服务器在流量峰值时，IO使用率连续两天处于70%以下，状态正常。



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