Zabbix server and proxy daemons now have an ability to reload in-memory configuration cache upon request. This can be done by passing parameter -R or --runtime-control and a runtime control option. Currently only one runtime option is supported - config_cache_reload.
Additional benefit when using active Zabbix proxies is that active proxy will request configuration from the Zabbix server upon receiving this request.
When a daemon receives such a request, it also logs it in the logfile. If the request is sent while configuration cache is being updated, it is ignored (but log file entry about signal received is still added).
Support for PostgreSQL 9+ was added.