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A load balancer’s analytics show the requests that pass through it, from its access logs: how many there are, how fast they’re answered, which status codes they get and where they come from. They’re on the load balancer’s Overview tab, under the traffic diagram.

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Open the analytics

In the sidebar, click Load balancers, then click the load balancer. Scroll the Overview tab down to Analytics. The traffic diagram on the same tab shows a separate number: the average response time over the past hour for the load balancer and for each destination. It doesn’t follow the analytics time range. See The Overview tab.

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Choose a time range

Open the Time range picker and choose a preset, or set a custom start and end date and time. With a preset, Live shows next to the picker and the charts move forward on their own. To zoom in, drag across a chart: the selection becomes a custom range for every chart. Hovering a chart shows the values at that time on every chart at once. The range and filters are part of the page’s address, so a copied link opens the same view.

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Filter the charts

Click Add filter, then choose a Field, a Condition and a Value. Every filter applies to every chart on the page; add more to narrow them further, and remove one with the x on it.

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What the analytics show

Three numbers sum up the range: The charts under them:
The Status codes chart of a load balancer, with responses grouped from 1xx to 5xxThe Status codes chart of a load balancer, with responses grouped from 1xx to 5xx
In Requests by country, hover a country in the list and click Filter to show only its requests, or Exclude to leave them out: both add a Country filter. Use the map’s zoom buttons to look closer.
Requests by country: a world map with the destinations marked and the countries ranked by requests, one country pointed atRequests by country: a world map with the destinations marked and the countries ranked by requests, one country pointed at

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Find a slow or failing destination

1

Find when it started

Add a Status code filter, greater than or equals 500, or look at Response time, and drag across the chart to zoom in on the problem.
2

Find the destination

Add a Destination filter for each destination in turn, with equals, to see which one returns the errors or answers slowly.
3

Take it out of rotation

Disable that destination to stop its traffic while you fix it, then enable it again.
For an application destination, its own analytics and logs show what happened inside it.