zabbix 数据库问题

 Too many connections
 ::052844.247 Cannot connect to the database. Exiting...
 ::052844.249 server # started [trapper #]
 ::052844.249 Cannot connect to the database. Exiting...
 ::052844.251 server # started [trapper #]
 ::052844.251 server # started [trapper #]
 ::052844.254 server # started [trapper #]
 ::052844.254 server # started [trapper #]
 ::052844.256 [Z3001] connection to database 'zabbix' failed: [] Too many connections
 ::052844.256 Cannot connect to the database. Exiting...
 ::052844.257 [Z3001] connection to database 'zabbix' failed: [] Too many connections
 ::052844.257 Cannot connect to the database. Exiting...
 ::052844.258 [Z3001] connection to database 'zabbix' failed: [] Too many connections
 ::052844.258 Cannot connect to the database. Exiting...
 ::052844.258 server # started [trapper #]
 ::052844.259 [Z3001] connection to database 'zabbix' failed: [] Too many connections
 ::052844.259 Cannot connect to the database. Exiting...
 ::052844.261 server # started [trapper #]
 ::052844.261 [Z3001] connection to database 'zabbix' failed: [] Too many connections
 ::052844.261 Cannot connect to the database. Exiting...
 ::052844.262 [Z3001] connection to database 'zabbix' failed: [] Too many connections
 ::052844.262 Cannot connect to the database. Exiting...
 ::052844.263 [Z3001] connection to database 'zabbix' failed: [] Too many connections
 ::052844.263 Cannot connect to the database. Exiting...
 ::052844.263 server # started [trapper #]
 ::052844.265 [Z3001] connection to database 'zabbix' failed: [] Too many connections
 ::052844.265 Cannot connect to the database. Exiting...
 ::052844.266 One child process died (PID:,exitcode/signal:). Exiting ...
 ::052844.312 server # started [trapper #]
 ::052844.316 syncing trend data...
 ::052844.316 syncing trend data done
 ::052844.316 Zabbix Server stopped. Zabbix 4.2. (revision 2c0e4d1d39).

处理方法：修改mariadb最大连接数

配置/etc/my.cnf
[mysqld]下新添加一行如下参数：
max_connections=300

vi /usr/lib/systemd/system/mariadb.service
取消[Service]前的#号，
[Service]新添加两行如下参数：
LimitNOFILE=10000
LimitNPROC=10000

systemctl --system daemon-reload
systemctl restart mariadb.service