Information schema is out of date: schema failed to update in 1 lease, please make sure TiDB can connect to TiKV"]

业务是周日晚上开始使用的, 周一正常使用,今天凌晨三点多有个数仓的拉数据任务,将集群拉的负载比较高,开始频繁报 schema is out of date ,tikv机器内存被打满, 11点左右恢复后, 下午偶尔还是报这个 schema is out of date 错误。