Release Notes for Zabbix 3.0.20

Zabbix Team is pleased to announce the availability of Zabbix 3.0.20.

Zabbix is an enterprise-class open source distributed monitoring solution. Zabbix is released under the GPL, thus it is free of charge for both commercial and non-commercial use. A complete text of the license is available at

This document contains the release notes for Zabbix 3.0.20. Download it from downloads.

The following sections describe the release in details and provide late-breaking or other information that supplements its main documentation.

Bug Fixes

fixed the disk usage counters reading for ESX/ESXi hosts
fixed timeselector period used to select 'all' values of particular item
fixed agent compilation error on AlphaServer Tru64 5.1B
fixed possible data loss due to MariaDB server restart
fixed crash of poller processes in ODBC checks, simplified code
fixed link "show value mappings", which leads to no permission page
improved function parameter parsing for trigger functions
removed redundant code in event details screen
improved error message handling in zbx_function_find()
added limit ZBX_HISTORY_PERIOD for {ITEM.VALUE} macro resolving in trigger name
fixed internal item parameter that does not match documentation

Installation and Upgrade Notes


See Zabbix Manual for full details.


Recompile Zabbix binaries and update front-end PHP files. Execute a database patch if migrating from Zabbix 1.8.x. See Zabbix Manual for a detailed upgrade procedure.

Commercial support

Zabbix Company provides a full range of Professional Services. We also provide trouble-free Upgrade Service for easy migration from earlier versions of Zabbix. Please contact Sales for pricing and more details.


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