I deployed a Zabbix server using the Docker image zabbix-server-pgsql:7.0.6-alpine.
My server specifications are:
    •    CPU: 24 cores
    •    RAM: 48 GB
    •    Active items in Zabbix: 14,054,522

The problem is that my configuration cache usage exceeds 90%. I reconfigured the Zabbix container by increasing the CacheSize parameter from 20 GB to 30 GB.

However, when I restarted the Zabbix server container, it got stuck at the process:
server #2 started configuration syncer #1.

I also checked the server resource usage. During startup, the Zabbix server consumed almost all available RAM, leaving only around 100 MB, which made the server unresponsive.

I then rolled back the CacheSize parameter to 20 GB, but after restarting, the Zabbix server container was still stuck and continued to consume all available RAM.

I don’t understand how the configuration cache works and why Zabbix is consuming almost all of the RAM. If the RAM usage should match the configured CacheSize, it shouldn’t be using all the available memory. When the Zabbix server container is stopped, there’s still around 40 GB of free RAM.

Is there any workaround to solve this issue?