Notes 3.1 Installation See the installation_from_source section for full details. 3.2 Version compatibility Older agents from Zabbix 1.0, Zabbix 1.1.x, Zabbix 1.4.x and Zabbix 1.6.x can be used with Zabbix in the release notes of the version. Before running upgrade scripts drop the following indexes: MySQL alter table dhosts drop index dhosts_1; alter table dservices drop index dservices_1; alter table Database upgrade scripts are located in directory upgrades/dbpatches/1.8/: • MySQL: upgrades/dbpatches/1.8/mysql/patch.sql • Oracle: upgrades/dbpatches/1.8/oracle/patch.sql • PostgreSQL: upgrades/dbpatches/1

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1120 13 Version compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . server will also accept historical data from 3.2 (and older) proxies, keeping partial backwards compatibility. • The default data storage period for internal, discovery and agent auto-registration events line parameters: • printing all built-in agent items with values • testing a user parameter with ”mysql.ping” key defined in the specified configuration file • installing a ”Zabbix Agent” service for Windows

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 783 11 Version compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . French 1.2 Daemon improvements 1.3 Miscellaneous improvements Fixed issues with mysql user parameter configuration script mysql.size parameter. It con- tained a complex bash expression and was failing if and graph sections was improved. • All frontend problems visible in Internet Explorer with ”Compatibility mode” enabled have been solved 8.1.7 New translations • American English • Chinese (Taiwan)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1255 13 Version compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . the ”data” element has been removed from all native items related to discovery, for backward compatibility Zabbix will still accept the JSON notation with a ”data” element, though its use is discouraged line parameters: • printing all built-in agent items with values • testing a user parameter with ”mysql.ping” key defined in the specified configuration file • installing a ”Zabbix Agent” service for Windows

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1351 11 Version compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . • remove host • enable host • remove from host group • unlink from template MySQL 8.0 supported Support for MySQL 8.0 has been added. Date-based indices setup for Elasticsearch In order to properly about the oc- curred problem. Database down message from now on consists of the following content: [MySQL|PostgreSQL|Oracle|IBM DB2] database [on :] is not available:

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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1059 12 Version compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . will be set to 0.0001 seconds. 3 Miscellaneous improvements Fixed issues with mysql user parameter configuration script mysql.size parameter. It contained a complex bash expression and was failing if the line parameters: • printing all built-in agent items with values • testing a user parameter with ”mysql.ping” key defined in the specified configuration file • installing a ”Zabbix Agent” service for Windows

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 997 12 Version compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . line parameters: • printing all built-in agent items with values • testing a user parameter with ”mysql.ping” key defined in the specified configuration file • installing a ”Zabbix Agent” service for Windows it by Hostname value from the config file shell> zabbix_agentd --print shell> zabbix_agentd -t "mysql.ping" -c /etc/zabbix/zabbix_agentd.conf shell> zabbix_agentd.exe -i shell> zabbix_agentd.exe -i -m

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 906 12 Version compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . indexes in Zabbix MySQL database schema ** Redundant indexes were removed in several Zabbix MySQL database tables. This should improve performance and slightly reduce the database size for MySQL users in these on child-table columns having foreign key constraints Such indexes were created automatically on MySQL, now they are created also on PostgreSQL, Oracle, DB2 to improve performance of Zabbix server and

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 898 11 Version compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . line parameters: • printing all built-in agent items with values • testing a user parameter with ”mysql.ping” key defined in the specified configuration file • installing a ”Zabbix Agent” service for Windows it by Hostname value from the config file shell> zabbix_agentd --print shell> zabbix_agentd -t "mysql.ping" -c /etc/zabbix/zabbix_agentd.conf shell> zabbix_agentd.exe -i shell> zabbix_agentd.exe -i -m

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1848 11 Version compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1862 4 Monitor MySQL with Zabbix agent 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . passive agent checks A JSON-based protocol for passive agent checks has been implemented. For compatibility with older agents, a failover to the old plaintext protocol has been added. If the agent returns