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app/vmselect/promql: reduce the maximum number of label values, which can be propagated from one side of the binary operation to another side of the binary operation from 10K to 1K

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There are user reports that 10K unique values in a single label filter may lead to performance and memory usage issues
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Aliaksandr Valialkin 2022-02-24 04:03:25 +02:00
parent 3f49bdaeff
commit 0d47c23a03
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app/vmselect/promql/eval.go
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@ -382,7 +382,7 @@ func getCommonLabelFilters(tss []*timeseries) []metricsql.LabelFilter {
continue
}
values = getUniqueValues(values)
if len(values) > 10000 {
if len(values) > 1000 {
// Skip the filter on the given tag, since it needs to enumerate too many unique values.
// This may slow down the search for matching time series.
continue