Improved performance of metric filtering and building history query.

src/datasource-zabbix/zabbixAPI.service.js

@@ -127,7 +127,8 @@ function ZabbixAPIService($q, alertSrv, zabbixAPICoreService) {
       var params = {
         output: ['name', 'host'],
         sortfield: 'name',
-        selectGroups: []
+        selectGroups: [],
+        selectApplications: ['applicationid']
       };
 
       return this.request('host.get', params);
@@ -140,7 +141,8 @@ function ZabbixAPIService($q, alertSrv, zabbixAPICoreService) {
 
         // Hack for supporting different apis (2.2 vs 2.4 vs 3.0)
         selectHost: [],
-        selectHosts: []
+        selectHosts: [],
+        selectItems: ['itemid']
       };
 
       return this.request('application.get', params);
@@ -170,9 +172,12 @@ function ZabbixAPIService($q, alertSrv, zabbixAPICoreService) {
       var params = {
         output: ['name', 'host'],
         sortfield: 'name',
-        selectGroups: [],
+        selectGroups: ['groupid'],
+        selectApplications: ['applicationid'],
         selectItems: [
-          'name', 'key_',
+          'itemid',
+          'name',
+          'key_',
           'value_type',
           'hostid',
           'status',