January 2019
Intermediate to advanced
490 pages
15h 37m
English
Content preview from Serverless Programming Cookbook
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Metrics
A metric is a time-ordered set of data points that is published to CloudWatch. A metric can be considered as a variable to monitor and the data points represent the values of that variable over a given time. The default metrics available for AWS Lambda functions include Invocations, Errors, DeadLetterErrors, Duration, Throttles, IteratorAge, ConcurrentExecutions, and UnreservedConcurrentExecutions.
Metrics are defined by a name, a namespace, and zero or more dimensions. For example, for the metric Invocations that we saw in this recipe, the namespace is AWS/Lambda. The dimensions are name–value pairs that can be associated with a CloudWatch metric. We can specify up to 10 dimensions for a given metric. The dimensions available for ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.