Update JVM metrics

- generate a metric for total Threads started since Jvm start time
micrometer-metrics · Feb 17, 2023 · 128aa0c · 128aa0c
1 parent 54f89f4
commit 128aa0c
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diff --git a/micrometer-core/src/main/java/io/micrometer/core/instrument/binder/jvm/JvmThreadMetrics.java b/micrometer-core/src/main/java/io/micrometer/core/instrument/binder/jvm/JvmThreadMetrics.java
@@ -66,6 +66,11 @@ public void bindTo(MeterRegistry registry) {
                 .description("The current number of live threads including both daemon and non-daemon threads")
                 .baseUnit(BaseUnits.THREADS).register(registry);
 
+        Gauge.builder("jvm.threads.started", threadBean, ThreadMXBean::getTotalStartedThreadCount).tags(tags)
+                .description(
+                        "The total number of threads created and also started since the Java virtual machine started")
+                .baseUnit(BaseUnits.THREADS).register(registry);
+
         try {
             threadBean.getAllThreadIds();
             for (Thread.State state : Thread.State.values()) {

diff --git a/...ter-core/src/test/java/io/micrometer/core/instrument/binder/jvm/JvmThreadMetricsTest.java b/...ter-core/src/test/java/io/micrometer/core/instrument/binder/jvm/JvmThreadMetricsTest.java
@@ -39,6 +39,7 @@ class JvmThreadMetricsTest {
     void threadMetrics() {
         MeterRegistry registry = new SimpleMeterRegistry();
         new JvmThreadMetrics().bindTo(registry);
+        double initialThreadCount = registry.get("jvm.threads.started").gauge().value();
 
         assertThat(registry.get("jvm.threads.live").gauge().value()).isGreaterThan(0);
         assertThat(registry.get("jvm.threads.daemon").gauge().value()).isGreaterThan(0);
@@ -51,6 +52,7 @@ void threadMetrics() {
 
         createTimedWaitingThread();
         assertThat(registry.get("jvm.threads.states").tag("state", "timed-waiting").gauge().value()).isGreaterThan(0);
+        assertThat(registry.get("jvm.threads.started").gauge().value()).isGreaterThan(initialThreadCount);
     }
 
     @Test