Environment：
3 Con + 30 Com（4.0.1） + 9 ceph

Precondition：
Zabbix agent enabled in node-30,node-31,node-32
Controllers' memory usage are monitored

Steps：

1. Do common operation for 10 days or more
2. Login Zabbix server to observer memory usage of contoller nodes

Expectation：
During long run,controllers' free memory > 20%

Actuality：
During long run,controllers' free memory may be less than 1G
Horizon can't login,Authentication failed easily

Probability：
10/10

Preliminary Analysis:
...