prometheus

Commit Graph

Author	SHA1	Message	Date
Oleg Zaytsev	9ad93ba8df	Optimize l=~".+" matcher (#15474 ) Since dot is matching newline now, `l=~".+"` is "any non empty label value", and #14144 added a specific method in the index for that so we don't need to run the matcher on each one of the label values. Signed-off-by: Oleg Zaytsev <mail@olegzaytsev.com>	1 year ago
Arve Knudsen	06d54fcc6c	[PERF] TSDB: Optimize inverse matching (#14144 ) Simple follow-up to #13620. Modify `tsdb.PostingsForMatchers` to use the optimized tsdb.IndexReader.PostingsForLabelMatching method also for inverse matching. Introduce method `PostingsForAllLabelValues`, to avoid changing the existing method. The performance is much improved for a subset of the cases; there are up to ~60% CPU gains and ~12.5% reduction in memory usage. Remove `TestReader_InversePostingsForMatcherHonorsContextCancel` since `inversePostingsForMatcher` only passes `ctx` to `IndexReader` implementations now. Signed-off-by: Arve Knudsen <arve.knudsen@gmail.com>	1 year ago
Ben Ye	f9057544cb	Fix AllPostings added twice (#13893 ) * handle all postings added twice --------- Signed-off-by: Ben Ye <benye@amazon.com>	1 year ago
György Krajcsovits	a4083f14e8	Fix populateWithDelChunkSeriesIterator corrupting chunk meta When handling recoded histogram chunks the min time of the chunk is updated by mistake. It should only update when the chunk is completely new. Otherwise the ongoing chunk's meta will be later than the previously written samples in it. Same bug as https://github.com/prometheus/prometheus/pull/14629 Signed-off-by: György Krajcsovits <gyorgy.krajcsovits@grafana.com>	1 year ago
Mario Fernandez	5814920601	Fix: optimize .* regexp performance Shortcut for `.*` matches newlines as well. Add preamble change ^(?s: Add test dotAll flag por al regex Add and fix regex tests Signed-off-by: Mario Fernandez <mariofer@redhat.com>	1 year ago
Arve Knudsen	b0aba26ed5	tsdb: Fix ValNone typo in comment Signed-off-by: Arve Knudsen <arve.knudsen@gmail.com>	1 year ago
Bryan Boreham	e04d137649	[PERF] TSDB: Query head and ooo-head together Add `HeadAndOOOQuerier` which iterates just once over series, then where necessary merges chunks from in-order and out-of-order lists. Add a ChunkQuerier for in-order and ooo together Add copy-last-chunk behaviour to HeadAndOOOChunkReader Out-of-order chunk IDs are distinguished from in-order by setting bit 23. Signed-off-by: Bryan Boreham <bjboreham@gmail.com>	1 year ago
Bryan Boreham	da31da3ea6	Refactor: extract selectSeriesSet and selectChunkSeriesSet Signed-off-by: Bryan Boreham <bjboreham@gmail.com>	1 year ago
🌲 Harry 🌊 John 🏔	d5f6887294	Pass limit param as hint to storage.Querier Signed-off-by: 🌲 Harry 🌊 John 🏔 <johrry@amazon.com>	2 years ago
Oleg Zaytsev	64a9abb8be	Change LabelValuesFor() to accept index.Postings (#14280 ) The only call we have to LabelValuesFor() has an index.Postings, and we expand it to pass to this method, which will iterate over the values. That's a waste of resources: we can iterate on the index.Postings directly. If there's any downstream implementation that has a slice of series, they can always do an index.ListPostings from them: doing that is cheaper than expanding an abstract index.Postings. Signed-off-by: Oleg Zaytsev <mail@olegzaytsev.com>	2 years ago
Ben Ye	6683895620	optimize regex matching for empty label values in posting match (#14075 ) Also update tests. Signed-off-by: Ben Ye <benye@amazon.com>	2 years ago
George Krajcsovits	fdaafdb041	tsdb: check for context cancel before regex matching postings (#14096 ) * tsdb: check for context cancel before regex matching postings Regex matching can be heavy if the regex takes a lot of cycles to evaluate and we can get stuck evaluating postings for a long time without this fix. The constant checkContextEveryNIterations=100 may be changed later. Signed-off-by: György Krajcsovits <gyorgy.krajcsovits@grafana.com>	2 years ago
Arve Knudsen	5c4310aa37	[ENHANCEMENT] TSDB: Optimize querying with regexp matchers Add method `PostingsForLabelMatching` to `tsdb.IndexReader`, to obtain postings for labels with a certain name and values accepted by a provided callback, and use it from `tsdb.PostingsForMatchers`. The intention is to optimize regexp matcher paths, especially not having to load all label values before matching on them. Plus tests, and refactor some `tsdb/index.Reader` methods. Benchmarking shows memory reduction up to ~100%, and speedup of up to ~50%. Signed-off-by: Arve Knudsen <arve.knudsen@gmail.com> Co-authored-by: Bartlomiej Plotka <bwplotka@gmail.com>	2 years ago
Alan Protasio	d15869af32	Avoid creating new slices for labels values on postings for matchers (#13958 ) * Avoid creating new slices for labels values on postings for matchers Signed-off-by: alanprot <alanprot@gmail.com> * refactor Signed-off-by: alanprot <alanprot@gmail.com> --------- Signed-off-by: alanprot <alanprot@gmail.com>	2 years ago
Matthieu MOREL	6f595c6762	golangci-lint: enable whitespace linter (#13905 ) Signed-off-by: Matthieu MOREL <matthieu.morel35@gmail.com>	2 years ago
machine424	f477e0539a	Move from golang.org/x/exp/slices into slices now that we only support Go >= 1.21 Prevent adding back golang.org/x/exp/slices. Signed-off-by: machine424 <ayoubmrini424@gmail.com>	2 years ago
Marco Pracucci	501bc6419e	Add ShardedPostings() support to TSDB (#10421 ) This PR is a reference implementation of the proposal described in #10420. In addition to what described in #10420, in this PR I've introduced labels.StableHash(). The idea is to offer an hashing function which doesn't change over time, and that's used by query sharding in order to get a stable behaviour over time. The implementation of labels.StableHash() is the hashing function used by Prometheus before stringlabels, and what's used by Grafana Mimir for query sharding (because built before stringlabels was a thing). Follow up work As mentioned in #10420, if this PR is accepted I'm also open to upload another foundamental piece used by Grafana Mimir query sharding to accelerate the query execution: an optional, configurable and fast in-memory cache for the series hashes. Signed-off-by: Marco Pracucci <marco@pracucci.com>	2 years ago
Marco Pracucci	ec9cada56e	Remove unused isRegexMetaCharacter() Signed-off-by: Marco Pracucci <marco@pracucci.com>	2 years ago
Marco Pracucci	515890ec53	Use Matcher.SetMatches() Signed-off-by: Marco Pracucci <marco@pracucci.com>	2 years ago
Filip Petkovski	583f3e587c	Optimize histogram iterators (#13340 ) Optimize histogram iterators Histogram iterators allocate new objects in the AtHistogram and AtFloatHistogram methods, which makes calculating rates over long ranges expensive. In #13215 we allowed an existing object to be reused when converting an integer histogram to a float histogram. This commit follows the same idea and allows injecting an existing object in the AtHistogram and AtFloatHistogram methods. When the injected value is nil, iterators allocate new histograms, otherwise they populate and return the injected object. The commit also adds a CopyTo method to Histogram and FloatHistogram which is used in the BufferedIterator to overwrite items in the ring instead of making new copies. Note that a specialized HPoint pool is needed for all of this to work (`matrixSelectorHPool`). --------- Signed-off-by: Filip Petkovski <filip.petkovsky@gmail.com> Co-authored-by: George Krajcsovits <krajorama@users.noreply.github.com>	2 years ago
Oleg Zaytsev	ed172a6667	Optimize label values with matchers by taking shortcuts (#13426 ) Don't calculate postings beforehand: we may not need them. If all matchers are for the requested label, we can just filter its values. Also, if there are no values at all, no need to run any kind of logic. Also add more labelValuesWithMatchers benchmarks Signed-off-by: Oleg Zaytsev <mail@olegzaytsev.com>	2 years ago
Matthieu MOREL	8f6cf3aabb	tsdb: use Go standard errors Signed-off-by: Matthieu MOREL <matthieu.morel35@gmail.com>	2 years ago
Fiona Liao	ce126230e7	Fix chunks iterator bug when tombstone covers a whole chunk (#13209 ) When no samples are returned in a chunk because all the samples have been deleted, the chunk iterator then stops without iterating through any remaining chunks. Signed-off-by: Fiona Liao <fiona.y.liao@gmail.com>	2 years ago
Fiona Liao	5bee0cfce2	Change `ChunkReader.Chunk()` to `ChunkOrIterable()` The ChunkReader interface's Chunk() has been changed to ChunkOrIterable(). This is a precursor to OOO native histogram support - with OOO native histograms, the chunks.Meta passed to Chunk() can result in multiple chunks being returned rather than just a single chunk (e.g. if oooMergedChunk has a counter reset in the middle). To support this, ChunkOrIterable() requires either a single chunk or an iterable to be returned. If an iterable is returned, the caller has the responsibility of converting the samples from the iterable into possibly multiple chunks. The OOOHeadChunkReader now returns an iterable rather than a chunk to prepare for the native histograms case. Also as a beneficial side effect, oooMergedChunk and boundedChunk has been simplified as they only need to implement the Iterable interface now, not the full Chunk interface. --------- Signed-off-by: Fiona Liao <fiona.y.liao@gmail.com> Co-authored-by: George Krajcsovits <krajorama@users.noreply.github.com>	2 years ago
Jeanette Tan	52eb303031	Refactor assigning MinTime in histogram chunks Signed-off-by: Jeanette Tan <jeanette.tan@grafana.com>	2 years ago
Jeanette Tan	27abf09e7f	Fix missing MinTime in histogram chunks Signed-off-by: Jeanette Tan <jeanette.tan@grafana.com>	2 years ago
Goutham Veeramachaneni	86729d4d7b	Update exp package (#12650 )	2 years ago
Alan Protasio	959c98441b	Add context argument to tsdb.PostingsForMatchers Signed-off-by: Alan Protasio <alanprot@gmail.com>	2 years ago
zenador	69edd8709b	Add warnings (and annotations) to PromQL query results (#12152 ) Return annotations (warnings and infos) from PromQL queries This generalizes the warnings we have already used before (but only for problems with remote read) as "annotations". Annotations can be warnings or infos (the latter could be false positives). We do not treat them different in the API for now and return them all as "warnings". It would be easy to distinguish them and return infos separately, should that appear useful in the future. The new annotations are then used to create a lot of warnings or infos during PromQL evaluations. Partially these are things we have wanted for a long time (e.g. inform the user that they have applied `rate` to a metric that doesn't look like a counter), but the new native histograms have created even more needs for those annotations (e.g. if a query tries to aggregate float numbers with histograms). The annotations added here are not yet complete. A prominent example would be a warning about a range too short for a rate calculation. But such a warnings is more tricky to create with good fidelity and we will tackle it later. Another TODO is to take annotations into account when evaluating recording rules. --------- Signed-off-by: Jeanette Tan <jeanette.tan@grafana.com>	2 years ago
Arve Knudsen	156222cc50	Add context argument to LabelQuerier.LabelValues (#12665 ) Add context argument to LabelQuerier.LabelValues and LabelQuerier.SortedLabelValues. Signed-off-by: Arve Knudsen <arve.knudsen@gmail.com>	2 years ago
Arve Knudsen	a964349e97	Add context argument to LabelQuerier.LabelNames (#12666 ) Signed-off-by: Arve Knudsen <arve.knudsen@gmail.com>	2 years ago
Arve Knudsen	4451ba10b4	Add context argument to IndexReader.Postings (#12667 ) Signed-off-by: Arve Knudsen <arve.knudsen@gmail.com>	2 years ago
Arve Knudsen	6daee89e5f	Add context argument to Querier.Select (#12660 ) Signed-off-by: Arve Knudsen <arve.knudsen@gmail.com>	2 years ago
Dimitar Dimitrov	b40865833d	PostingsForMatchers race with creating new series (#12558 ) Signed-off-by: Dimitar Dimitrov <dimitar.dimitrov@grafana.com>	2 years ago
Bryan Boreham	bdc7983956	TSDB: re-use iterator when moving between series Signed-off-by: Bryan Boreham <bjboreham@gmail.com>	2 years ago
George Krajcsovits	6cd2d1621f	Hide histogram chunk append and reset header internals (#12352 ) tsdb: Hide histogram chunk append and reset header internals Signed-off-by: György Krajcsovits <gyorgy.krajcsovits@grafana.com> Signed-off-by: George Krajcsovits <krajorama@users.noreply.github.com>	2 years ago
Patrick Oyarzun	68e5937474	Apply relevant label matchers in LabelValues before fetching extra postings (#12274 ) * Apply matchers when fetching label values Signed-off-by: Patrick Oyarzun <patrick.oyarzun@grafana.com> * Avoid extra copying of label values Signed-off-by: Patrick Oyarzun <patrick.oyarzun@grafana.com> --------- Signed-off-by: Patrick Oyarzun <patrick.oyarzun@grafana.com>	2 years ago
Alan Protasio	73078bf738	Opmizing Group Regex (#12375 ) Signed-off-by: Alan Protasio <alanprot@gmail.com>	3 years ago
Alan Protasio	8c5d4b4add	Opmize MatchNotEqual (#12377 ) Signed-off-by: Alan Protasio <alanprot@gmail.com>	3 years ago
George Krajcsovits	92d6980360	Fix populateWithDelChunkSeriesIterator and gauge histograms (#12330 ) Use AppendableGauge to detect corrupt chunk with gauge histograms. Detect if first sample is a gauge but the chunk is not set up to contain gauge histograms. Signed-off-by: György Krajcsovits <gyorgy.krajcsovits@grafana.com> Signed-off-by: George Krajcsovits <krajorama@users.noreply.github.com>	3 years ago
Alan Protasio	c0f1abb574	MatchNotRegexp optimization Signed-off-by: Alan Protasio <alanprot@gmail.com>	3 years ago
beorn7	5b53aa1108	style: Replace `else if` cascades with `switch` Wiser coders than myself have come to the conclusion that a `switch` statement is almost always superior to a statement that includes any `else if`. The exceptions that I have found in our codebase are just these two: * The `if else` is followed by an additional statement before the next condition (separated by a `;`). * The whole thing is within a `for` loop and `break` statements are used. In this case, using `switch` would require tagging the `for` loop, which probably tips the balance. Why are `switch` statements more readable? For one, fewer curly braces. But more importantly, the conditions all have the same alignment, so the whole thing follows the natural flow of going down a list of conditions. With `else if`, in contrast, all conditions but the first are "hidden" behind `} else if `, harder to spot and (for no good reason) presented differently from the first condition. I'm sure the aforemention wise coders can list even more reasons. In any case, I like it so much that I have found myself recommending it in code reviews. I would like to make it a habit in our code base, without making it a hard requirement that we would test on the CI. But for that, there has to be a role model, so this commit eliminates all `if else` occurrences, unless it is autogenerated code or fits one of the exceptions above. Signed-off-by: beorn7 <beorn@grafana.com>	3 years ago
beorn7	c3c7d44d84	lint: Adjust to the lint warnings raised by current versions of golint-ci We haven't updated golint-ci in our CI yet, but this commit prepares for that. There are a lot of new warnings, and it is mostly because the "revive" linter got updated. I agree with most of the new warnings, mostly around not naming unused function parameters (although it is justified in some cases for documentation purposes – while things like mocks are a good example where not naming the parameter is clearer). I'm pretty upset about the "empty block" warning to include `for` loops. It's such a common pattern to do something in the head of the `for` loop and then have an empty block. There is still an open issue about this: https://github.com/mgechev/revive/issues/810 I have disabled "revive" altogether in files where empty blocks are used excessively, and I have made the effort to add individual `// nolint:revive` where empty blocks are used just once or twice. It's borderline noisy, though, but let's go with it for now. I should mention that none of the "empty block" warnings for `for` loop bodies were legitimate. Signed-off-by: beorn7 <beorn@grafana.com>	3 years ago
Matthieu MOREL	fb3eb21230	enable gocritic, unconvert and unused linters Signed-off-by: Matthieu MOREL <matthieu.morel35@gmail.com>	3 years ago
Alex Le	1936868e9d	Allow populate block logic in compact to be overriden outside Prometheus (#11711 ) Signed-off-by: Alex Le <leqiyue@amazon.com> Signed-off-by: Alex Le <emoc1989@gmail.com>	3 years ago
Alan Protasio	6ddadd98b4	Optimization on `mergedStringIter` (#12132 ) Optimization on NewMergedStringIter Signed-off-by: Alan Protasio <alanprot@gmail.com>	3 years ago
Ganesh Vernekar	0c0c2af7f5	Do not re-encode head chunk in ChunkQuerier Signed-off-by: Ganesh Vernekar <ganeshvern@gmail.com>	3 years ago
Oleg Zaytsev	de93a279a0	Shortcut postings for matchers when empty postings are selected (#11813 ) * Add more benchmark cases * Add shortcuts for empty postings Signed-off-by: Oleg Zaytsev <mail@olegzaytsev.com>	3 years ago
Bryan Boreham	e61348d9f3	tsdb/index: fast-track postings for label="" We need to special-case ""="" too, which is used in some tests to mean "everything". Signed-off-by: Bryan Boreham <bjboreham@gmail.com>	3 years ago
Bryan Boreham	cf92cd2688	tsdb: sort values for Postings only when required In the head and in v1 postings on disk, it makes no difference whether postings are sorted. Only for v2 does the code step through in order. So, move the sorting to where it is required, and thus skip it entirely in the head. Label values in on-disk blocks are already sorted, but `slices.Sort` is very fast on already-sorted data so we don't bother checking. Signed-off-by: Bryan Boreham <bjboreham@gmail.com>	3 years ago

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129 Commits (9ad93ba8df6de2a9ad752e2e53a1bdbf99f34db4)