Steps to reproduce:

1. Installed Proxy in an environment with 57 hosts. Works normally for a few weeks.
2. Rapid use of diskspace occurs. The culprit is the table proxy_history , which fills the root partition. The size is over 35GB.
3. The Zabbix proxy halts as the root partition is full.

Result:

select count(itemid) from proxy_history;

+---------------+
| count(itemid) |
+---------------+
| 222263503     |
+---------------+

1 row in set (2 min 56.82 sec)

between UNIX timestamps 1563522801 and 1569842893.

Expected:
Consistent use of disk space, not perpetual growth.

Possible cause:

Zabbix sender items in template.