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Keep track of the time spent in each registered cluster state applier / listener and other cluster state applier activities. Also adjusted the discovery stats to include these time spent stats broken down by individual registered appliers / listeners and other cluster state applier activities. Also replaced the usage of `StopWatch` in `ClusterStateApplierService` with `ClusterApplierRecordingService.Recorder`. Relates to #77466
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185 changes: 185 additions & 0 deletions
185
server/src/main/java/org/elasticsearch/cluster/service/ClusterApplierRecordingService.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,185 @@ | ||
| /* | ||
| * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one | ||
| * or more contributor license agreements. Licensed under the Elastic License | ||
| * 2.0 and the Server Side Public License, v 1; you may not use this file except | ||
| * in compliance with, at your election, the Elastic License 2.0 or the Server | ||
| * Side Public License, v 1. | ||
| */ | ||
| package org.elasticsearch.cluster.service; | ||
|
|
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| import org.elasticsearch.cluster.service.ClusterApplierRecordingService.Stats.Recording; | ||
| import org.elasticsearch.common.io.stream.StreamInput; | ||
| import org.elasticsearch.common.io.stream.StreamOutput; | ||
| import org.elasticsearch.common.io.stream.Writeable; | ||
| import org.elasticsearch.common.metrics.MeanMetric; | ||
| import org.elasticsearch.common.util.Maps; | ||
| import org.elasticsearch.common.xcontent.ToXContentFragment; | ||
| import org.elasticsearch.common.xcontent.XContentBuilder; | ||
| import org.elasticsearch.core.Releasable; | ||
| import org.elasticsearch.core.TimeValue; | ||
| import org.elasticsearch.core.Tuple; | ||
|
|
||
| import java.io.IOException; | ||
| import java.util.Comparator; | ||
| import java.util.HashMap; | ||
| import java.util.HashSet; | ||
| import java.util.LinkedList; | ||
| import java.util.List; | ||
| import java.util.Map; | ||
| import java.util.Objects; | ||
| import java.util.Set; | ||
| import java.util.function.LongSupplier; | ||
|
|
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| public final class ClusterApplierRecordingService { | ||
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| private final Map<String, MeanMetric> recordedActions = new HashMap<>(); | ||
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| synchronized Stats getStats() { | ||
| return new Stats( | ||
| recordedActions.entrySet().stream() | ||
| .sorted(Comparator.<Map.Entry<String, MeanMetric>>comparingLong(o -> o.getValue().sum()).reversed()) | ||
| .collect(Maps.toUnmodifiableOrderedMap(Map.Entry::getKey, v -> new Recording(v.getValue().count(), v.getValue().sum()))) | ||
| ); | ||
| } | ||
|
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| synchronized void updateStats(Recorder recorder) { | ||
| Set<String> seenActions = new HashSet<>(); | ||
| for (Tuple<String, Long> entry : recorder.recordings) { | ||
| String action = entry.v1(); | ||
| long timeSpentMS = entry.v2(); | ||
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| MeanMetric metric = recordedActions.computeIfAbsent(action, key -> new MeanMetric()); | ||
| metric.inc(timeSpentMS); | ||
| seenActions.add(action); | ||
| } | ||
| recordedActions.entrySet().removeIf(entry -> seenActions.contains(entry.getKey()) == false); | ||
| } | ||
|
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| static final class Recorder { | ||
|
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| private String currentAction; | ||
| private long startTimeMS; | ||
| private boolean recording; | ||
| private final List<Tuple<String, Long>> recordings = new LinkedList<>(); | ||
| private final LongSupplier currentTimeSupplier; | ||
|
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| Recorder(LongSupplier currentTimeSupplier) { | ||
| this.currentTimeSupplier = currentTimeSupplier; | ||
| } | ||
|
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| Releasable record(String action) { | ||
| if (recording) { | ||
| throw new IllegalStateException("already recording"); | ||
| } | ||
|
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| this.recording = true; | ||
| this.currentAction = action; | ||
| this.startTimeMS = currentTimeSupplier.getAsLong(); | ||
| return this::stop; | ||
| } | ||
|
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| void stop() { | ||
| recording = false; | ||
| long timeSpentMS = currentTimeSupplier.getAsLong() - this.startTimeMS; | ||
| recordings.add(new Tuple<>(currentAction, timeSpentMS)); | ||
| } | ||
|
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| List<Tuple<String, Long>> getRecordings() { | ||
| return recordings; | ||
| } | ||
| } | ||
|
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| public static class Stats implements Writeable, ToXContentFragment { | ||
|
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| private final Map<String, Recording> recordings; | ||
|
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| public Stats(Map<String, Recording> recordings) { | ||
| this.recordings = recordings; | ||
| } | ||
|
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| public Map<String, Recording> getRecordings() { | ||
| return recordings; | ||
| } | ||
|
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| public Stats(StreamInput in) throws IOException { | ||
| this(in.readOrderedMap(StreamInput::readString, Recording::new)); | ||
| } | ||
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| @Override | ||
| public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException { | ||
| builder.startObject("cluster_applier_stats"); | ||
| builder.startArray("recordings"); | ||
| for (Map.Entry<String, Recording> entry : recordings.entrySet()) { | ||
| builder.startObject(); | ||
| builder.field("name", entry.getKey()); | ||
| String name = "cumulative_execution"; | ||
| builder.field(name + "_count", entry.getValue().count); | ||
| builder.humanReadableField(name + "_time_millis", name + "_time", TimeValue.timeValueMillis(entry.getValue().sum)); | ||
| builder.endObject(); | ||
| } | ||
| builder.endArray(); | ||
| builder.endObject(); | ||
| return builder; | ||
| } | ||
|
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| @Override | ||
| public void writeTo(StreamOutput out) throws IOException { | ||
| out.writeMap(recordings, StreamOutput::writeString, (out1, value) -> value.writeTo(out1)); | ||
| } | ||
|
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| @Override | ||
| public boolean equals(Object o) { | ||
| if (this == o) return true; | ||
| if (o == null || getClass() != o.getClass()) return false; | ||
| Stats stats = (Stats) o; | ||
| return Objects.equals(recordings, stats.recordings); | ||
| } | ||
|
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| @Override | ||
| public int hashCode() { | ||
| return Objects.hash(recordings); | ||
| } | ||
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| public static class Recording implements Writeable { | ||
|
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| private final long count; | ||
| private final long sum; | ||
|
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| public Recording(long count, long sum) { | ||
| this.count = count; | ||
| this.sum = sum; | ||
| } | ||
|
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| public Recording(StreamInput in) throws IOException { | ||
| this(in.readVLong(), in.readVLong()); | ||
| } | ||
|
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| @Override | ||
| public void writeTo(StreamOutput out) throws IOException { | ||
| out.writeVLong(count); | ||
| out.writeVLong(sum); | ||
| } | ||
|
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| @Override | ||
| public boolean equals(Object o) { | ||
| if (this == o) return true; | ||
| if (o == null || getClass() != o.getClass()) return false; | ||
| Recording recording = (Recording) o; | ||
| return count == recording.count && sum == recording.sum; | ||
| } | ||
|
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| @Override | ||
| public int hashCode() { | ||
| return Objects.hash(count, sum); | ||
| } | ||
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| @Override | ||
| public String toString() { | ||
| return "Recording{" + | ||
| "count=" + count + | ||
| ", sum=" + sum + | ||
| '}'; | ||
| } | ||
| } | ||
| } | ||
| } |
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