Sum over range vector?

[Dave Cadwallader]

Let's say I have a gauge called "foo".  I can get the sum of all values of foo since the beginning of time using:

sum(foo)

But let's say I want to get the sum of all values of foo, from the past 5 min.  I tried:

sum(foo[5m])

...but I got an error: "expected type instant vector in aggregation expression, got range vector"

Is there a way to sum across a range vector, or a different approach to achieve my goal?

Thanks!

[Dave Cadwallader]

Just realized that sum(foo) doesn't give me the sum of all values since the beginning of time, but only the most recent value.  So I think I have a misunderstanding about how sum works.

[Ben Kochie]

You can use sum_over_time(foo[5m]) to add up all the values in a metric over time.

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[Dave Cadwallader]

Brilliant! I somehow missed this in the docs, but I see it now.  Thanks.  

On Wednesday, January 3, 2018 at 11:03:15 AM UTC-7, Ben Kochie wrote:

You can use sum_over_time(foo[5m]) to add up all the values in a metric over time.

On Wed, Jan 3, 2018 at 6:59 PM, Dave Cadwallader <dcadwa...@gmail.com> wrote:

Just realized that sum(foo) doesn't give me the sum of all values since the beginning of time, but only the most recent value.  So I think I have a misunderstanding about how sum works.

On Wednesday, January 3, 2018 at 10:55:08 AM UTC-7, Dave Cadwallader wrote:

Let's say I have a gauge called "foo".  I can get the sum of all values of foo since the beginning of time using:

sum(foo)

But let's say I want to get the sum of all values of foo, from the past 5 min.  I tried:

sum(foo[5m])

...but I got an error: "expected type instant vector in aggregation expression, got range vector"

Is there a way to sum across a range vector, or a different approach to achieve my goal?

Thanks!

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