Столкнулся одновременно со множеством проблем в Zabbix. Выключил мониторинг практически всех хостов, но проблема не ушла. На данный момент из около 30.
Zabbix server: Utilization of trapper processes over 75%
Zabbix server: Utilization of task manager processes over 75%
Zabbix server: Utilization of proxy poller processes over 75%
Zabbix server: Utilization of trigger housekeeper processes over 75%
Zabbix server: Utilization of housekeeper processes over 75%
Zabbix server: Utilization of history poller processes over 75%
Zabbix server: Utilization of availability manager processes over 75%