Examples with Snapshot com.codahale.metrics.Snapshot used on opensource projects

Example 1 with Snapshot

use of com.codahale.metrics.Snapshot in project lucene-solr by apache.

the class MetricUtils method convertHistogram.

/**
   * Convert an instance of {@link Histogram}. NOTE: it's assumed that histogram contains non-time
   * based values that don't require unit conversion.
   * @param name metric name
   * @param histogram an instance of {@link Histogram}
   * @param propertyFilter limit what properties of a metric are returned
   * @param simple use simplified representation for complex metrics - instead of a (name, map)
   *             only the selected (name "." key, value) pairs will be produced.
   * @param consumer consumer that accepts produced objects
   */
static void convertHistogram(String name, Histogram histogram, PropertyFilter propertyFilter, boolean simple, BiConsumer<String, Object> consumer) {
    Snapshot snapshot = histogram.getSnapshot();
    if (simple) {
        if (propertyFilter.accept(MEAN)) {
            consumer.accept(name + "." + MEAN, snapshot.getMean());
        }
    } else {
        Map<String, Object> response = new LinkedHashMap<>();
        String prop = "count";
        if (propertyFilter.accept(prop)) {
            response.put(prop, histogram.getCount());
        }
        // non-time based values
        addSnapshot(response, snapshot, propertyFilter, false);
        if (!response.isEmpty()) {
            consumer.accept(name, response);
        }
    }
}

Example 2 with Snapshot

use of com.codahale.metrics.Snapshot in project lucene-solr by apache.

the class MetricUtils method addMetrics.

/**
   * Adds metrics from a Timer to a NamedList, using well-known back-compat names.
   * @param lst The NamedList to add the metrics data to
   * @param timer The Timer to extract the metrics from
   */
public static void addMetrics(NamedList<Object> lst, Timer timer) {
    Snapshot snapshot = timer.getSnapshot();
    lst.add("avgRequestsPerSecond", timer.getMeanRate());
    lst.add("5minRateRequestsPerSecond", timer.getFiveMinuteRate());
    lst.add("15minRateRequestsPerSecond", timer.getFifteenMinuteRate());
    lst.add("avgTimePerRequest", nsToMs(snapshot.getMean()));
    lst.add("medianRequestTime", nsToMs(snapshot.getMedian()));
    lst.add("75thPcRequestTime", nsToMs(snapshot.get75thPercentile()));
    lst.add("95thPcRequestTime", nsToMs(snapshot.get95thPercentile()));
    lst.add("99thPcRequestTime", nsToMs(snapshot.get99thPercentile()));
    lst.add("999thPcRequestTime", nsToMs(snapshot.get999thPercentile()));
}

Example 3 with Snapshot

use of com.codahale.metrics.Snapshot in project lucene-solr by apache.

the class OverseerTest method printTimingStats.

private void printTimingStats(Timer timer) {
    Snapshot snapshot = timer.getSnapshot();
    log.info("\t avgRequestsPerSecond: {}", timer.getMeanRate());
    log.info("\t 5minRateRequestsPerSecond: {}", timer.getFiveMinuteRate());
    log.info("\t 15minRateRequestsPerSecond: {}", timer.getFifteenMinuteRate());
    log.info("\t avgTimePerRequest: {}", nsToMs(snapshot.getMean()));
    log.info("\t medianRequestTime: {}", nsToMs(snapshot.getMedian()));
    log.info("\t 75thPcRequestTime: {}", nsToMs(snapshot.get75thPercentile()));
    log.info("\t 95thPcRequestTime: {}", nsToMs(snapshot.get95thPercentile()));
    log.info("\t 99thPcRequestTime: {}", nsToMs(snapshot.get99thPercentile()));
    log.info("\t 999thPcRequestTime: {}", nsToMs(snapshot.get999thPercentile()));
}

Example 4 with Snapshot

use of com.codahale.metrics.Snapshot in project lucene-solr by apache.

the class MetricUtilsTest method testSolrTimerGetSnapshot.

@Test
public void testSolrTimerGetSnapshot() {
    // create a timer with up to 100 data points
    final Timer timer = new Timer();
    final int iterations = random().nextInt(100);
    for (int i = 0; i < iterations; ++i) {
        timer.update(Math.abs(random().nextInt()) + 1, TimeUnit.NANOSECONDS);
    }
    // obtain timer metrics
    Map<String, Object> map = new HashMap<>();
    MetricUtils.convertTimer("", timer, MetricUtils.PropertyFilter.ALL, false, false, (k, v) -> {
        map.putAll((Map<String, Object>) v);
    });
    NamedList lst = new NamedList(map);
    // check that expected metrics were obtained
    assertEquals(14, lst.size());
    final Snapshot snapshot = timer.getSnapshot();
    // cannot test avgRequestsPerMinute directly because mean rate changes as time increases!
    // assertEquals(lst.get("avgRequestsPerSecond"), timer.getMeanRate());
    assertEquals(timer.getFiveMinuteRate(), lst.get("5minRate"));
    assertEquals(timer.getFifteenMinuteRate(), lst.get("15minRate"));
    assertEquals(MetricUtils.nsToMs(snapshot.getMean()), lst.get("mean_ms"));
    assertEquals(MetricUtils.nsToMs(snapshot.getMedian()), lst.get("median_ms"));
    assertEquals(MetricUtils.nsToMs(snapshot.get75thPercentile()), lst.get("p75_ms"));
    assertEquals(MetricUtils.nsToMs(snapshot.get95thPercentile()), lst.get("p95_ms"));
    assertEquals(MetricUtils.nsToMs(snapshot.get99thPercentile()), lst.get("p99_ms"));
    assertEquals(MetricUtils.nsToMs(snapshot.get999thPercentile()), lst.get("p999_ms"));
}

Example 5 with Snapshot

use of com.codahale.metrics.Snapshot in project sling by apache.

the class MetricWebConsolePlugin method addTimerDetails.

private void addTimerDetails(PrintWriter pw, SortedMap<String, Timer> timers) {
    if (timers.isEmpty()) {
        return;
    }
    pw.println("<br>");
    pw.println("<div class='table'>");
    pw.println("<div class='ui-widget-header ui-corner-top buttonGroup'>Timers</div>");
    pw.println("<table class='nicetable' id='data-timers'>");
    pw.println("<thead>");
    pw.println("<tr>");
    pw.println("<th class='header'>Name</th>");
    pw.println("<th class='header'>Count</th>");
    pw.println("<th class='header'>Mean Rate</th>");
    pw.println("<th class='header'>1 min rate</th>");
    pw.println("<th class='header'>5 mins rate</th>");
    pw.println("<th class='header'>15 mins rate</th>");
    pw.println("<th class='header'>50%</th>");
    pw.println("<th class='header'>Min</th>");
    pw.println("<th class='header'>Max</th>");
    pw.println("<th class='header'>Mean</th>");
    pw.println("<th class='header'>StdDev</th>");
    pw.println("<th class='header'>75%</th>");
    pw.println("<th class='header'>95%</th>");
    pw.println("<th class='header'>98%</th>");
    pw.println("<th class='header'>99%</th>");
    pw.println("<th class='header'>999%</th>");
    pw.println("<th>Rate Unit</th>");
    pw.println("<th>Duration Unit</th>");
    pw.println("</tr>");
    pw.println("</thead>");
    pw.println("<tbody>");
    String rowClass = "odd";
    for (Map.Entry<String, Timer> e : timers.entrySet()) {
        Timer t = e.getValue();
        Snapshot s = t.getSnapshot();
        String name = e.getKey();
        double rateFactor = timeUnit.rateFor(name).toSeconds(1);
        String rateUnit = "events/" + calculateRateUnit(timeUnit.rateFor(name));
        double durationFactor = 1.0 / timeUnit.durationFor(name).toNanos(1);
        String durationUnit = timeUnit.durationFor(name).toString().toLowerCase(Locale.US);
        pw.printf("<tr class='%s ui-state-default'>%n", rowClass);
        pw.printf("<td>%s</td>", name);
        pw.printf("<td>%d</td>", t.getCount());
        pw.printf("<td>%f</td>", t.getMeanRate() * rateFactor);
        pw.printf("<td>%f</td>", t.getOneMinuteRate() * rateFactor);
        pw.printf("<td>%f</td>", t.getFiveMinuteRate() * rateFactor);
        pw.printf("<td>%f</td>", t.getFifteenMinuteRate() * rateFactor);
        pw.printf("<td>%f</td>", s.getMedian() * durationFactor);
        pw.printf("<td>%f</td>", s.getMin() * durationFactor);
        pw.printf("<td>%f</td>", s.getMax() * durationFactor);
        pw.printf("<td>%f</td>", s.getMean() * durationFactor);
        pw.printf("<td>%f</td>", s.getStdDev() * durationFactor);
        pw.printf("<td>%f</td>", s.get75thPercentile() * durationFactor);
        pw.printf("<td>%f</td>", s.get95thPercentile() * durationFactor);
        pw.printf("<td>%f</td>", s.get98thPercentile() * durationFactor);
        pw.printf("<td>%f</td>", s.get99thPercentile() * durationFactor);
        pw.printf("<td>%f</td>", s.get999thPercentile() * durationFactor);
        pw.printf("<td>%s</td>", rateUnit);
        pw.printf("<td>%s</td>", durationUnit);
        pw.println("</tr>");
        rowClass = "odd".equals(rowClass) ? "even" : "odd";
    }
    pw.println("</tbody>");
    pw.println("</table>");
    pw.println("</div>");
}