Configure distribution statistic for http.server.requests in spring-boot

Question

Is there a way to configure distribution statistic expiry and buffer length for http.server.requests metrics?

I need to increase the expiry and couldn't find the proper way of doing this with spring boot actuator. Is it possible to configure these settings?

Please add more details and share what you have tried if any — Romil Patel, Mar 27 '19 at 08:37
The micrometer timers have the ability to increase `distributionStatisticExpiry` and `distributionStatisticBufferLength` but I can't find a way to set these settings for my percentiles in spring-boot's `http.server.requests`. I want to increase the window in witch percentiles are calculated for `http.server.requests` and can't find a proper way of doing this. — Ivan Nakov, Mar 27 '19 at 08:59

score 1 · Accepted Answer · answered May 28 '19 at 08:50

You should look at DistributionStatisticConfig. The creation of DEFAULT instance shows how to set expiry and bufferLength.

All you have to do in Spring Boot is register a bean MeterRegistryCustomizer in your @SpringBootApplication or @Configuration class.

import org.springframework.boot.actuate.autoconfigure.metrics.MeterRegistryCustomizer;

@Bean
public MeterRegistryCustomizer<MeterRegistry> metricsCommonTags() {
    return registry -> registry.config()
        .commonTags("myTag", myTagValue)
        .meterFilter(new MeterFilter() {

            @Override
            public DistributionStatisticConfig configure(Meter.Id id,
                                                         DistributionStatisticConfig config) {
                if (id.getName().startsWith("http.server.requests")) {
                    return config.merge(DistributionStatisticConfig.builder()
                        .percentilesHistogram(true)
                        .percentiles(0.5, 0.9, 0.99)
                        .percentilePrecision(1)
                        .minimumExpectedValue(1L)
                        .maximumExpectedValue(Long.MAX_VALUE)
                        .expiry(Duration.ofMinutes(1))
                        .bufferLength(2)
                        .build());
                }
                return config;
            }
        });
}

You can also ask on Micrometer's Slack channel.

Configure distribution statistic for http.server.requests in spring-boot

1 Answers1