Release Notes for Zabbix 5.0.27rc1

Zabbix Team is pleased to announce the availability of Zabbix 5.0.27rc1.

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 5.0.27rc1. Download it from download.

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

New Features and Improvements

ZBXNEXT-7520 Added template for OPNsense

Bug Fixes

ZBX-21328 Fixed Zabbix agent 2 log and eventlog items behavior to match Zabbix agent when key has been updated
ZBX-21234 Fixed net.dns to return 0 when server is unreachable in Zabbix agent 2
ZBX-21445 Improved performance by only calling res_init() on changed resolv.conf if glibc lower than 2.26 is used
ZBX-21385 Fixed setting of character set for MySQL and MariaDB when utf8mb3 is missing while utf8 is present
ZBX-20975 Fixed PHP TypeError in inaccessible dashboard view
ZBX-19769 Fixed performance when Host API is filtering records by severity or suppressed problems
ZBX-19176 Fixed multiple performance issues in map navigation tree widget and map
ZBX-21295 Changed system.cpu.load[percpu] to split based on online CPUs in Zabbix agent 2
ZBX-18573 Improved performance of directory scanning by Zabbix agent on Windows
ZBX-21138 Blocked housekeeper history/trends record creation on item removal when history/trends housekeeping is disabled
ZBX-20901 Changed host macro in MySQL by Zabbix agent template to use TCP/IP connection method explicitly
ZBX-21344 Changed JS preprocessing in Apache by HTTP/Zabbix agent templates to use ServerActive field from status page primarily
ZBX-21220 Changed uptime item description, removed uptime trigger in Zookeeper by HTTP template
ZBX-20992 Fixed typos and duplications in templates
ZBX-20419 Fixed database deadlocks and MySQL error number calculation to be consistent between logging and recoverability detection logic
ZBX-20656 Updated active proxy throttling to allow task transfer
ZBX-21153 Fixed info collection about access to VMware DS for HV with large number of connected DS
ZBX-4646 Fixed month abbreviation with capital "M"
ZBX-21333 Fixed housekeeper table usage with disabled housekeeping

Installation and Upgrade Notes


See Zabbixマニュアル for full details.


See Upgrade procedure for upgrade options and instructions. For version specific upgrade notes, see Upgrade notes for 5.0.27.

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 営業への問い合わせ for pricing and more details.


Zabbix 5.0 Manual