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commit 15af3e6b73f91295b71fe5db92cf34864718c150 Author: 吴晟 Wu Sheng <wu.sh...@foxmail.com> AuthorDate: Tue Mar 5 13:57:59 2024 +0800 Add a statement for MAL practice. --- docs/en/concepts-and-designs/mal.md | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/docs/en/concepts-and-designs/mal.md b/docs/en/concepts-and-designs/mal.md index 50ff6decc6..43f236445c 100644 --- a/docs/en/concepts-and-designs/mal.md +++ b/docs/en/concepts-and-designs/mal.md @@ -175,6 +175,14 @@ instance_trace_count{az="az-1"} 133 // 100 + 33 instance_trace_count{az="az-3"} 20 ``` +___ +**Note, aggregation operations affect the samples for one bulk only. If the metrics are reported parallel from multiple instances/nodes +through different SampleFamily, this aggregation would NOT work.** + +In the best practice for this scenario, build the metric with labels that represent each instance/node. Then use the +[AggregateLabels Operation in MQE](../api/metrics-query-expression.md#aggregatelabels-operation) to aggregate the metrics. +___ + ### Function `Duration` is a textual representation of a time range. The formats accepted are based on the ISO-8601 duration format {@code PnDTnHnMn.nS}