The Prometheus monitoring system and time series database.

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beorn7 a7c519930e histograms: Add Compact method to the normal integer Histogram And use the new method to call to compact Histograms during parsing. This happens for both `Histogram` and `FloatHistogram`. In this way, if targets decide to optimize the exposition size by merging spans with empty buckets in between, we still get a normalized results. It will also normalize away any valid but weird representations like empty spans, spans with offset zero, and empty buckets at the start or end of a span. The implementation seemed easy at first as it just turns the `compactBuckets` helper into a generic function (which now got its own file). However, the integer Histograms have delta buckets instead of absolute buckets, which had to be treated specially in the generic `compactBuckets` function. To make sure it works, I have added plenty of explicit tests for `Histogram` in addition to the `FloatHistogram` tests. I have also updated the doc comment for the `Compact` method. Based on the insights now expressed in the doc comment, compacting with a maxEmptyBuckets > 0 is rarely useful. Therefore, this commit also sets the value to 0 in the two cases we were using 3 so far. We might still want to reconsider, so I don't want to remove the maxEmptyBuckets parameter right now. Signed-off-by: beorn7 <beorn@grafana.com>		2 years ago
..
README.md	Move packages out of deprecated pkg directory	3 years ago
interface.go	histograms: parse float histograms from proto definition (#11149 )	2 years ago
interface_test.go	Improve content-type error handling	3 years ago
openmetricslex.l	Move packages out of deprecated pkg directory	3 years ago
openmetricslex.l.go	refactor (package model): move from github.com/pkg/errors to 'errors' and 'fmt' packages (#10747 )	2 years ago
openmetricsparse.go	histograms: parse float histograms from proto definition (#11149 )	2 years ago
openmetricsparse_test.go	Merge branch 'main' into sparsehistogram	2 years ago
promlex.l	refactor (package model): move from github.com/pkg/errors to 'errors' and 'fmt' packages (#10747 )	2 years ago
promlex.l.go	refactor (package model): move from github.com/pkg/errors to 'errors' and 'fmt' packages (#10747 )	2 years ago
promparse.go	histograms: parse float histograms from proto definition (#11149 )	2 years ago
promparse_test.go	refactor (package model): move from github.com/pkg/errors to 'errors' and 'fmt' packages (#10747 )	2 years ago
promtestdata.nometa.txt	Move packages out of deprecated pkg directory	3 years ago
promtestdata.txt	Move packages out of deprecated pkg directory	3 years ago
protobufparse.go	histograms: Add Compact method to the normal integer Histogram	2 years ago
protobufparse_test.go	histograms: parse float histograms from proto definition (#11149 )	2 years ago

README.md

Making changes to textparse lexers

In the rare case that you need to update the textparse lexers, edit promlex.l or openmetricslex.l and then run the following command: golex -o=promlex.l.go promlex.l

Note that you need golex installed: go get -u modernc.org/golex