janhoy commented on code in PR #4209:
URL: https://github.com/apache/solr/pull/4209#discussion_r2945149367
##########
solr/core/src/java/org/apache/solr/metrics/OtelRuntimeJvmMetrics.java:
##########
@@ -65,6 +75,38 @@ public ContextPropagators getPropagators() {
// TODO: We should have this configurable to enable/disable
specific JVM metrics
.enableAllFeatures()
.build();
+ java.lang.management.OperatingSystemMXBean osMxBean =
+ ManagementFactory.getOperatingSystemMXBean();
+ if (osMxBean instanceof com.sun.management.OperatingSystemMXBean
extOsMxBean) {
+ systemMemoryTotalGauge =
+ solrMetricManager.observableLongGauge(
+ registryName,
+ "jvm.system.memory",
Review Comment:
I'd rather comply with OTEL standards than with prometheus conventions since
I see a clear trend in pushing metrics to other systems than prometheus.
Note: I tried in another system to push dot separated metric names directly
into prometheus, and while it worked, it is not pleasant to work with in
prometheus/grafana, as you often need to escape things all the time, e.g. write
`{"foo.bar.baz"}` rather than just `foo_bar_baz`
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