zabbix报错：
zabbix server is not running:the information displayer may not be current。
环境是centos7。首先进服务器，查看日志
tail -20 /var/log/zabbix/zabbix_server.log

显示：

zbx_mem_realloc(): please increase CacheSize configuration parameter
16541:20200210:100236.335 === memory statistics for configuration cache ===
16541:20200210:100236.335 min chunk size: 18446744073709551615 bytes
16541:20200210:100236.335 max chunk size: 0 bytes
16541:20200210:100236.335 memory of total size 8388232 bytes fragmented into 71313 chunks
16541:20200210:100236.335 of those, 0 bytes are in 0 free chunks
16541:20200210:100236.335 of those, 7247240 bytes are in 71313 used chunks**
__zbx_mem_realloc(): out of memory (requested 16 bytes)
16855:20200210:100555.586 [file:dbconfig.c,line:94]

out of memory please increase CacheSize
根据提示，进行设置

vim /etc/zabbix/zabbix_server.conf

打开zabbix_server.conf找到Option: CacheSize,把原来的# CacheSize=8M前面的#注释去掉,将8M修改为1024,这个1024根据服务器性能修改.

Option: CacheSize
Size of configuration cache, in bytes.
Shared memory size for storing host, item and trigger data.
Mandatory: no
Range: 128K-8G
Default:
CacheSize=1024M

最后重启zabbix服务

systemctl start zabbix_server.service