8 Queue

Overview

In the Administration → Queue section items that are waiting to be updated are displayed.

Ideally, when you open this section it should all be "green" meaning no items in the queue. If all items are updated without delay, there are none waiting. However, due to lacking server performance, connection problems or problems with agents, some items may get delayed and the information is displayed in this section. For more details, see the Queue section.

From the dropdown in the upper right corner you can select:

• queue overview by item type
• queue overview by proxy
• list of delayed items

Overview by item type

In this screen it is easy to locate if the problem is related to one or several item types.

Each line contains an item type. Each column shows the number of waiting items - waiting for 5-10 seconds/10-30 seconds/30-60 seconds/1-5 minutes/5-10 minutes or over 10 minutes respectively.

Overview by proxy

In this screen it is easy to locate if the problem is related to one of the proxies or the server.

Each line contains a proxy, with the server last in the list. Each column shows the number of waiting items - waiting for 5-10 seconds/10-30 seconds/30-60 seconds/1-5 minutes/5-10 minutes or over 10 minutes respectively.

List of waiting items

In this screen, each waiting item is listed.

In the host column, hosts monitored by proxy are prefixed with the proxy name (since Zabbix 2.4.0).

Displayed data:

Possible error messages

You may encounter a situation when no data is displayed and the following error message appears:

Error message in this case is the following:

Cannot display item queue. Permission denied

This happens when PHP configuration parameters $ZBX_SERVER_PORT or $ZBX_SERVER in zabbix.conf.php point to existing Zabbix server which uses different database.