prometheus

Commit Graph

Author	SHA1	Message	Date
George Krajcsovits	00ab05c3b9	Native histograms: fix spurios counter reset when merging recoded chunk to normal chunk (#14513 ) * chunkenc: allow missing empty buckets on histogram append Allow appending to chunks when the histogram to be added is missing some buckets, but the missing buckets are empty in the chunk. For example bucket at index 5 is present in the chunk, but its value is 0 and the new histogram doesn't have a bucket at index 5. This fixes an issue of merging chunks where one chunk was recoded to retroactively have some empty buckets in all the histograms and we are merging in a histogram that doesn't have the empty bucket (because it was not recoded yet). The operation alters the histogram that is being added, however this has already been the case when appending gauge histograms. Thus the test TestHistogramSeriesToChunks in storage package is changed to explicitly test what happened to the appended histogram - Compact(0) call is removed. The new expandIntSpansAndBuckets and expandFloatSpansAndBuckets functions are a merge of expandSpansForward and counterResetInAnyBucket and counterResetInAnyFloatBucket. Signed-off-by: György Krajcsovits <gyorgy.krajcsovits@grafana.com>	4 months ago
Jeanette Tan	9adc1699c3	fix according to code review Signed-off-by: Jeanette Tan <jeanette.tan@grafana.com>	6 months ago
György Krajcsovits	bcafa5f1f9	Merge remote-tracking branch 'upstream/main' into update-nhcb	7 months ago
Matthieu MOREL	6f595c6762	golangci-lint: enable whitespace linter (#13905 ) Signed-off-by: Matthieu MOREL <matthieu.morel35@gmail.com>	8 months ago
George Krajcsovits	4eab18abd6	[nhcb branch] Use single bit to differentiate between optimized bounds and floats (#13828 ) * Use single bit to differentiate between optimized bounds and floats Use one bit to decide what kind of data to read/write. This reduces storage need of floats from 72 bits to 65 bits and makes the integers store in 5 to 32 bits instead of 16. Signed-off-by: György Krajcsovits <gyorgy.krajcsovits@grafana.com> Signed-off-by: Jeanette Tan <jeanette.tan@grafana.com> Signed-off-by: György Krajcsovits <gyorgy.krajcsovits@grafana.com> Signed-off-by: Jeanette Tan <jeanette.tan@grafana.com> Signed-off-by: George Krajcsovits <krajorama@users.noreply.github.com> Co-authored-by: Jeanette Tan <jeanette.tan@grafana.com>	8 months ago
zenador	4acbb7dea6	Add custom buckets to native histogram chunks encoding (#13706 ) * add custom bounds to chunks encoding * change custom buckets schema number * rename custom bounds to custom values Signed-off-by: Jeanette Tan <jeanette.tan@grafana.com>	8 months ago
Oleksandr Redko	fa90ca46e5	ci(lint): enable godot; append dot at the end of comments Signed-off-by: Oleksandr Redko <Oleksandr_Redko@epam.com>	1 year ago
György Krajcsovits	b2fa4d910a	Fix more counterResetInAnyBucket edgecases Case a) empty span is at the beginning of the spans. Case b) two consequtive empty spans with positive offsets. Signed-off-by: György Krajcsovits <gyorgy.krajcsovits@grafana.com>	1 year ago
György Krajcsovits	c6618729c9	Fix HistogramAppender.Appendable array out of bound error The code did not handle spans with 0 length properly. Spans with length zero are now skipped in the comparison. Span index check not done against length-1, since length is a unit32, thus subtracting 1 leads to 2^32, not -1. Fixes and unit tests for both integer and float histograms added. Signed-off-by: György Krajcsovits <gyorgy.krajcsovits@grafana.com>	2 years ago
beorn7	1cfc8f65a3	histograms: Return actually useful counter reset hints This is a bit more conservative than we could be. As long as a chunk isn't the first in a block, we can be pretty sure that the previous chunk won't disappear. However, the incremental gain of returning NotCounterReset in these cases is probably very small and might not be worth the code complications. Wwith this, we now also pay attention to an explicitly set counter reset during ingestion. While the case doesn't show up in practice yet, there could be scenarios where the metric source knows there was a counter reset even if it might not be visible from the values in the histogram. It is also useful for testing. Signed-off-by: beorn7 <beorn@grafana.com>	2 years ago
beorn7	57c18420ab	histograms: General readability tweaks - Adjust doc comments to go1.19 style. - Break down some overly long lines. - Minor doc comment tweaks and fixes. - Some renaming. Some rationales for the last point: I have renamed “interjections” into “inserts”, mostly because it is shorter, and the word shows up a lot by now (and the concept is cryptic enough to not obfuscate it even more with abbreviations). I have also tried to find more descriptive naming for the “compare spans” functions. Signed-off-by: beorn7 <beorn@grafana.com>	2 years ago
beorn7	6dcd03dbf3	tsdb: Add integer gauge histogram support This follows what #11783 has done for float gauge histograms. Signed-off-by: beorn7 <beorn@grafana.com>	2 years ago
Ganesh Vernekar	8ad0d2d5d7	tsdb: Find union of two sets of histogram spans Signed-off-by: Ganesh Vernekar <ganeshvern@gmail.com>	2 years ago
Ganesh Vernekar	d7f5129042	tsdb: Add logic to determine appendable gauge float histograms This is to check if a gauge histogram can be appended to the given chunk. If not, it tells what changes to make to the chunk and the histogram if possible. Signed-off-by: Ganesh Vernekar <ganeshvern@gmail.com>	2 years ago
Ganesh Vernekar	6fd89a6fd2	Add chunk encoding for float histogram (#11716 ) Signed-off-by: Marc Tudurí <marctc@protonmail.com> Signed-off-by: Ganesh Vernekar <ganeshvern@gmail.com> Co-authored-by: Marc Tudurí <marctc@protonmail.com>	2 years ago
Signed-off-by: Jesus Vazquez	3362bf6d79	Fix merge conflicts Signed-off-by: Jesus Vazquez <jesus.vazquez@grafana.com> Signed-off-by: Ganesh Vernekar <ganeshvern@gmail.com> Co-authored-by: Ganesh Vernekar <ganeshvern@gmail.com>	2 years ago
beorn7	0876d57aea	chunkenc: Add test for chunk layout encoding And fix a bug exposed by it... Signed-off-by: beorn7 <beorn@grafana.com>	3 years ago
beorn7	ad9b4c2b68	Fix typos Signed-off-by: beorn7 <beorn@grafana.com>	3 years ago
beorn7	d31bb75dc4	Use VarbitUint rather than VarbitInt to encode len(spans) Signed-off-by: beorn7 <beorn@grafana.com>	3 years ago
beorn7	3179215a59	Encode zero threshold first This guaranees that the zero threshold is byte-aligned. Not sure if that helps in any way, but at least it won't harm. Signed-off-by: beorn7 <beorn@grafana.com>	3 years ago
beorn7	c5522677bf	Improve encoding of zero threshold Signed-off-by: beorn7 <beorn@grafana.com>	3 years ago
beorn7	7093b089f2	Use more varbit in histogram chunks This adds bit buckets for larger numbers to varbit encoding and also an unsigned version of varbit encoding. Then, varbit encoding is used for all the histogram chunk data instead of varint. Signed-off-by: beorn7 <beorn@grafana.com>	3 years ago
Ganesh Vernekar	dcaf568279	Metadata -> Layout renaming Signed-off-by: Ganesh Vernekar <ganeshvern@gmail.com>	3 years ago
beorn7	7a8bb8222c	Style cleanup of all the changes in sparsehistogram so far A lot of this code was hacked together, literally during a hackathon. This commit intends not to change the code substantially, but just make the code obey the usual style practices. A (possibly incomplete) list of areas: * Generally address linter warnings. * The `pgk` directory is deprecated as per dev-summit. No new packages should be added to it. I moved the new `pkg/histogram` package to `model` anticipating what's proposed in #9478. * Make the naming of the Sparse Histogram more consistent. Including abbreviations, there were just too many names for it: SparseHistogram, Histogram, Histo, hist, his, shs, h. The idea is to call it "Histogram" in general. Only add "Sparse" if it is needed to avoid confusion with conventional Histograms (which is rare because the TSDB really has no notion of conventional Histograms). Use abbreviations only in local scope, and then really abbreviate (not just removing three out of seven letters like in "Histo"). This is in the spirit of https://github.com/golang/go/wiki/CodeReviewComments#variable-names * Several other minor name changes. * A lot of formatting of doc comments. For one, following https://github.com/golang/go/wiki/CodeReviewComments#comment-sentences , but also layout question, anticipating how things will look like when rendered by `godoc` (even where `godoc` doesn't render them right now because they are for unexported types or not a doc comment at all but just a normal code comment - consistency is queen!). * Re-enabled `TestQueryLog` and `TestEndopints` (they pass now, leaving them disabled was presumably an oversight). * Bucket iterator for histogram.Histogram is now created with a method. * HistogramChunk.iterator now allows iterator recycling. (I think @dieterbe only commented it out because he was confused by the question in the comment.) * HistogramAppender.Append panics now because we decided to treat staleness marker differently. Signed-off-by: beorn7 <beorn@grafana.com>	3 years ago

24 Commits (6ca5b9cd40c5bd4e64fe3b281463a73f1035141b)