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beorn7 836f1db04c Improve MetricsForLabelMatchers ... WIP: This needs more tests. It now gets a from and through value, which it may opportunistically use to optimize the retrieval. With possible future range indices, this could be used in a very efficient way. This change merely applies some easy checks, which should nevertheless solve the use case of heavy rule evaluations on servers with a lot of series churn. Idea is the following: - Only archive series that are at least as old as the headChunkTimeout (which was already extremely unlikely to happen). - Then maintain a high watermark for the last archival, i.e. no archived series has a sample more recent than that watermark. - Any query that doesn't reach to a time before that watermark doesn't have to touch the archive index at all. (A production server at Soundcloud with the aforementioned series churn and heavy rule evaluations spends 50% of its CPU time in archive index lookups. Since rule evaluations usually only touch very recent values, most of those lookup should disappear with this change.) - Federation with a very broad label matcher will profit from this, too. As a byproduct, the un-needed MetricForFingerprint method was removed from the Storage interface.		9 years ago
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testdata	Merge branch 'beorn7/storage2' into beorn7/storage3	9 years ago
analyzer.go	Improve MetricsForLabelMatchers	9 years ago
ast.go	Fix various typos in comments.	9 years ago
engine.go	Improve predict_linear	9 years ago
engine_test.go	promql: Reduce flakiness of concurrency test	9 years ago
functions.go	Improve predict_linear	9 years ago
lex.go	Add without aggregator modifier.	9 years ago
lex_test.go	Fix typo in lexer test.	9 years ago
parse.go	use short variable assignment	9 years ago
parse_test.go	rewrite operator balancing to be recursive	9 years ago
printer.go	Add without aggregator modifier.	9 years ago
printer_test.go	Add without aggregator modifier.	9 years ago
promql_test.go	Fix most golint warnings.	9 years ago
quantile.go	Switch promql types to common/model	9 years ago
test.go	Fix missing comment period.	9 years ago