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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.config.server.metrics;
import java.util.Optional;
/**
* @author olaa
* @author ogronnesby
*/
public class DeploymentMetricsAggregator {
private LatencyMetrics feed;
private LatencyMetrics qr;
private LatencyMetrics container;
private Double documentCount;
private ResourceUsage memoryUsage;
private ResourceUsage diskUsage;
public synchronized DeploymentMetricsAggregator addFeedLatency(double sum, double count) {
this.feed = combineLatency(this.feed, sum, count);
return this;
}
public synchronized DeploymentMetricsAggregator addQrLatency(double sum, double count) {
this.qr = combineLatency(this.qr, sum, count);
return this;
}
public synchronized DeploymentMetricsAggregator addContainerLatency(double sum, double count) {
this.container = combineLatency(this.container, sum, count);
return this;
}
public synchronized DeploymentMetricsAggregator addDocumentCount(double count) {
this.documentCount = (this.documentCount == null ? 0.0 : this.documentCount) + count;
return this;
}
public synchronized DeploymentMetricsAggregator addDiskUsage(double feedBlockUtil, double feedBlockLimit) {
this.diskUsage = combineResourceUtil(this.diskUsage, feedBlockUtil, feedBlockLimit);
return this;
}
public synchronized DeploymentMetricsAggregator addMemoryUsage(double feedBlockUtil, double feedBlockLimit) {
this.memoryUsage = combineResourceUtil(this.memoryUsage, feedBlockUtil, feedBlockLimit);
return this;
}
public Optional<Double> aggregateFeedLatency() {
return Optional.ofNullable(feed).map(m -> m.sum / m.count).filter(num -> !num.isNaN());
}
public Optional<Double> aggregateFeedRate() {
return Optional.ofNullable(feed).map(m -> m.count / 60);
}
public Optional<Double> aggregateQueryLatency() {
if (container == null && qr == null) return Optional.empty();
var c = Optional.ofNullable(container).orElseGet(LatencyMetrics::new);
var q = Optional.ofNullable(qr).orElseGet(LatencyMetrics::new);
return Optional.of((c.sum + q.sum) / (c.count + q.count)).filter(num -> !num.isNaN());
}
public Optional<Double> aggregateQueryRate() {
if (container == null && qr == null) return Optional.empty();
var c = Optional.ofNullable(container).orElseGet(LatencyMetrics::new);
var q = Optional.ofNullable(qr).orElseGet(LatencyMetrics::new);
return Optional.of((c.count + q.count) / 60);
}
public Optional<Double> aggregateDocumentCount() {
return Optional.ofNullable(documentCount);
}
public Optional<ResourceUsage> memoryUsage() {
return Optional.ofNullable(memoryUsage);
}
public Optional<ResourceUsage> diskUsage() {
return Optional.ofNullable(diskUsage);
}
private static LatencyMetrics combineLatency(LatencyMetrics metricsOrNull, double sum, double count) {
return Optional.ofNullable(metricsOrNull).orElseGet(LatencyMetrics::new).combine(sum, count);
}
private static ResourceUsage combineResourceUtil(ResourceUsage resourceUsageOrNull, double util, double limit) {
return Optional.ofNullable(resourceUsageOrNull).orElseGet(ResourceUsage::new).combine(util, limit);
}
private static class LatencyMetrics {
private double sum;
private double count;
private LatencyMetrics combine(double sum, double count) {
this.sum += sum;
this.count += count;
return this;
}
}
public static class ResourceUsage {
/**
* Current resource utilization relative to feed block limit, i.e. value of >= 1 means utilization at or above
* feed block limit.
*/
private double feedBlockUtil;
/** Resource utilization limit at which further external feed is blocked */
private double feedBlockLimit;
private ResourceUsage combine(double feedBlockUtil, double feedBlockLimit) {
if (feedBlockUtil > this.feedBlockUtil) this.feedBlockUtil = feedBlockUtil;
if (feedBlockLimit > this.feedBlockLimit) this.feedBlockLimit = feedBlockLimit;
return this;
}
public double util() { return feedBlockUtil * feedBlockLimit; }
public double feedBlockLimit() { return feedBlockLimit; }
}
}
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