Cassandra优化之查询超时优化

1、ReadTimeout-1200

cqlsh:spacewalk> select count(*) from rhnpackagecapability;
ReadTimeout: Error from server: code=1200 [Coordinator node timed out waiting for replica nodes‘ responses] message="Operation timed out - received only 1 responses." info={‘received_responses‘: 1, ‘required_responses‘: 1, ‘consistency‘: ‘ONE‘}
cqlsh:spacewalk> exit

遇到此报错，只需增加以下几个参数的值：

[root@db03 ~]# vi /etc/cassandra/default.conf/cassandra.yaml
read_request_timeout_in_ms: 600000
range_request_timeout_in_ms: 600000
slow_query_log_timeout_in_ms: 600000
[root@db03 ~]# systemctl restart cassandra

修改完成后，重启cassandra服务。再次查询，结果如下图：

2、Client request timeout

系统默认的客户端请求时间是10秒，如果遇到此报错，需增加客户端请求超时。如下：

[root@db03 ~]# vi .cassandra/cqlshrc 
...
[connection]
request_timeout = 600
....

后续遇到类似错误还会继续更新此博文。

Cassandra优化之查询超时优化

原文：https://blog.51cto.com/candon123/2440776