ZBXNEXT-1686 added the new feature "Persistent queue for active items in Zabbix agent 2" . However it is not mentioned anywhere in the documentation that it works only for active items. 2 developers and 1 QA tester spent significant amount of time trying to test persistent buffer before figuring this small detail out. I propose to change the following:
1. following
From:

These parameters are used to configure persistent storage on agent 2. 

To:

These parameters are used to configure persistent storage on agent 2 for active items

.

2. following and 3. following
From:

Enable usage of local persistent storage. 

To:

Enable usage of local persistent storage for active items.