manual:installation:upgrade_notes_440

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manual:installation:upgrade_notes_440 [2019/10/09 06:50]
martins-v real-time export protocol changed
manual:installation:upgrade_notes_440 [2020/05/11 08:34]
martins-v upgrade with MariaDB 10.2.1 and before may fail; compact row format (ZBX-17690)
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 [[:​manual/​appendix/​install/​real_time_export|Real-time export]] now also includes host names, not only the visible host names. Note that the real-time [[:​manual/​appendix/​protocols/​real_time_export|export protocol]] has been changed with host name information now an object, rather than a string/​array. [[:​manual/​appendix/​install/​real_time_export|Real-time export]] now also includes host names, not only the visible host names. Note that the real-time [[:​manual/​appendix/​protocols/​real_time_export|export protocol]] has been changed with host name information now an object, rather than a string/​array.
 +
 +=== Upgrade with MariaDB 10.2.1 and before ===
 +
 +Upgrading Zabbix may fail if database tables were created with MariaDB 10.2.1 and before, because in those versions the default row format is compact. This can be fixed by changing the row format to dynamic (see also [[https://​support.zabbix.com/​browse/​ZBX-17690|ZBX-17690]]).
  
 ==== Informational ==== ==== Informational ====
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 Zabbix screens no longer support the possibility to display another screen as a screen element. After the upgrade, all screen cells containing another screen will be empty. Zabbix screens no longer support the possibility to display another screen as a screen element. After the upgrade, all screen cells containing another screen will be empty.
 +
 +=== Linked template selection ===
 +
 +The auto-select field for selecting linked templates has been removed from host/​template configuration forms. To link templates, click on //Add// and then select templates in the popup window.
  
 === Changed host export format === === Changed host export format ===
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 Realtime fields have been split from the ''​items''​ table into a new table called ''​item_rtdata''​. See also [[:​manual/​introduction/​whatsnew440#​items_table_split|What'​s new in 4.4.0]]. Realtime fields have been split from the ''​items''​ table into a new table called ''​item_rtdata''​. See also [[:​manual/​introduction/​whatsnew440#​items_table_split|What'​s new in 4.4.0]].
 +
 +===Zabbix frontend sets own cookie path===
 +
 +If Zabbix frontend runs behind proxy, cookie path set by Zabbix now needs to be specified in the proxy configuration. See [[manual/​appendix/​other_issues#​using Zabbix frontend behind proxy|using Zabbix frontend behind proxy]] for details.
 +
 +=== 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.