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Add APM instrumentation #702
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Looks good from the Go Agent usage angle, just a couple of minor comments.
categories.go
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func (filter categoriesFilter) Filter(ctx context.Context, packages util.Packages) map[string]util.Package { | ||
span, _ := apm.StartSpan(ctx, "FilterPackages", "custom") |
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I would suggest changing all the span types from "custom" to "app". This should work better with the "time spent by span type" chart in APM:
Transaction time is countered under "app", and if you add spans with type "app" then they will add to this. i.e. it's best practice (probably not written down anywhere) to use "app" for spans related to application code.
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Changed 👍
Btw, when initializing the service (here), I am using "backend.init" as transaction type, is this ok?
Are there some guidelines or list of recommended values for transaction and span types?
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That is okay, and I don't think it particularly matters. HTTP requests will be given the transaction type "request". I'm not aware of any guidance for transaction types for this kind of program initialisation.
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LGTM as long as CI is happy. Do we need to modify Dockerfiles in Package Storage too?
Yes, next step would be to see where we send the data, and configure the registries used in production. |
In #670 we are planning to introduce some refactors, in part motivated by performance issues. Introduce some instrumentation to evaluate what parts of the service require more performance tunning. And in the future to be able to compare the impact of the applied changes.
With this instrumentation we can collect traces such as this one:
Checklist:
/categories
, tests failing.