The Prometheus monitoring system and time series database.

prometheus hacktoberfest metrics alerting graphing monitoring time-series

Filip Petkovski be7a4c9b83 Ignore stale histograms for counter reset detection The histogram stats decoder keeps track of the last seen histogram sample in order to properly detect counter resets. We are seeing an issue where a histogram with UnknownResetHint gets treated as a counter reset when it follows a stale histogram sample. I believe that this is incorrect since stale samples should be completely ignored in PromQL. As a result, they should not be stored in the histogram stats iterator and the counter reset detection needs to be done against the last non-stale sample. Signed-off-by: Filip Petkovski <filip.petkovsky@gmail.com>		4 months ago
..
agent	[PRW 2.0] Merging `remote-write-2.0` feature branch to main (PRW 2.0 support + metadata in WAL) (#14395 )	5 months ago
chunkenc	Fix a couple of comments	5 months ago
chunks	TSDB: Simplify OOO Select by copying the head chunk (#14396 )	5 months ago
docs	…
encoding	…
errors	…
fileutil	…
goversion	…
index	Replace `ListPostings.Seek`'s binary search call by the generic `slices.BinarySearch` (#14393 )	5 months ago
record	Fix a couple of comments	5 months ago
testdata	…
tombstones	…
tsdbutil	Ignore stale histograms for counter reset detection	4 months ago
wlog	Merge branch 'release-2.53' into merge-2.53.1	5 months ago
.gitignore	…
CHANGELOG.md	…
README.md	…
block.go	tsdb: Extend compactor interface to allow compactions to create multiple output blocks (#14143 )	5 months ago
block_test.go	tsdb: Extend compactor interface to allow compactions to create multiple output blocks (#14143 )	5 months ago
blockwriter.go	tsdb: Extend compactor interface to allow compactions to create multiple output blocks (#14143 )	5 months ago
blockwriter_test.go	…
compact.go	TSDB: Change block populator to accept postings index function (#14213 )	5 months ago
compact_test.go	TSDB: Change block populator to accept postings index function (#14213 )	5 months ago
db.go	TSDB: rebuild labels symbol-table on each compaction	5 months ago
db_test.go	Merge pull request #14109 from harry671003/pass_limit_to_querier	4 months ago
example_test.go	…
exemplar.go	[ENHANCEMENT] TSDB: Save map lookup on validation	6 months ago
exemplar_test.go	[Test] TSDB: BenchmarkResizeExemplar multiple per series	6 months ago
head.go	TSDB: shrink memSeries by moving bools together	4 months ago
head_append.go	Merge pull request #14438 from prometheus/cedwards/ooo-chunk-encoding	4 months ago
head_bench_test.go	…
head_dedupelabels.go	tsdb: reset symbol table for exemplars periodically	5 months ago
head_other.go	TSDB: rebuild labels symbol-table on each compaction	5 months ago
head_read.go	TSDB: Lock around access to labels in head under -tags dedupelabels (#14322 )	5 months ago
head_read_test.go	TSDB: Simplify OOO Select by copying the head chunk (#14396 )	5 months ago
head_test.go	Refactor TestWBLReplay to use scenarios	4 months ago
head_wal.go	TSDB: Lock around access to labels in head under -tags dedupelabels (#14322 )	5 months ago
isolation.go	…
isolation_test.go	…
mocks_test.go	…
ooo_head.go	Fix linting	4 months ago
ooo_head_read.go	Merge pull request #14438 from prometheus/cedwards/ooo-chunk-encoding	4 months ago
ooo_head_read_test.go	Fix test	5 months ago
ooo_head_test.go	…
ooo_isolation.go	…
ooo_isolation_test.go	…
querier.go	Pass limit param as hint to storage.Querier	5 months ago
querier_bench_test.go	…
querier_test.go	Pass limit param as hint to storage.Querier	5 months ago
repair.go	…
repair_test.go	…
testutil.go	Testutil refactoring	5 months ago
tsdbblockutil.go	…

README.md

TSDB

This directory contains the Prometheus TSDB (Time Series DataBase) library, which handles storage and querying of all Prometheus v2 data.

Documentation

External resources

A writeup of the original design can be found here.
Video: Storing 16 Bytes at Scale from PromCon 2017.
Compression is based on the Gorilla TSDB white paper.

A series of blog posts explaining different components of TSDB: