[comment]: # translation:outdated

[comment]: # ({new-0fc3b56c})
# 22 Заметки по обновлению для 4.0.13

Эта минорная версия не содержит каких-либо заметок по обновлению.

[comment]: # ({/new-0fc3b56c})

[comment]: # ({new-7cf31d66})
#### Item update interval for unreachable hosts

A bug related to item check time on unreachable hosts has been fixed.
This bug was introduced in Zabbix version 3.4.9 or 4.0.0. Now the item
check period is recalculated based on the UnavailableDelay value, not on
the item update period. This can potentially change unreachable poller
performance. For example, if item previously had a delay of 1h then now
it will be checked based on the UnavailableDelay value, not every 1h as
it was (due to bug). Therefore it is recommended to increase
UnavailableDelay value to avoid possible unreachable poller overload.

[comment]: # ({/new-7cf31d66})