I was able to reproduce this with a clean wildfly24 installation with the microprofile-metrics-smallrye extenstion added to the standalone & deploying a wicket quickstart application with only hibernate added & 200 basic entities. I added the server to eclipse & added the myproject deployment, then called  http://127.0.0.1:9990/metrics   I also did a some profiling and one of the things which stood out was that not being able to find a capability service name is slow (about 20% of the total time). It's trying to find a capability but when it does not find it it throws an exception  which takes some time to create (and this method is called a lot), and the exception is ignored anyways , so not the only cause but definitely something. Threaddump of the management thread during the request capturing where the calls are coming from: "management I/O-1" #72 prio=5 os_prio=0 cpu=24574.31ms elapsed=52520.41s tid=0x0000558c8efa6800 nid=0xd1 runnable [0x00007fc20bb8b000] java.lang. Thread .State: RUNNABLE at java.lang.Throwable.fillInStackTrace(java.base@11.0.12/Native Method) at java.lang.Throwable.fillInStackTrace(java.base@11.0.12/Unknown Source) - locked <0x00000006bff6fba0> (a java.lang.IllegalStateException) at java.lang.Throwable.<init>(java.base@11.0.12/Unknown Source) at java.lang.Exception.<init>(java.base@11.0.12/Unknown Source) at java.lang.RuntimeException.<init>(java.base@11.0.12/Unknown Source) at java.lang.IllegalStateException.<init>(java.base@11.0.12/Unknown Source) at org.jboss.as.controller.logging.ControllerLogger_$logger.unknownCapability(ControllerLogger_$logger.java:2711) at org.jboss.as.controller.CapabilityRegistry.getCapabilityRegistration(CapabilityRegistry.java:945) at org.jboss.as.controller.CapabilityRegistry.getCapabilityServiceName(CapabilityRegistry.java:679) at org.jboss.as.controller.OperationContextImpl$CapabilityServiceSupportImpl.getCapabilityServiceName(OperationContextImpl.java:2602) at org.jboss.as.controller.OperationContextImpl$CapabilityServiceSupportImpl.getCapabilityServiceName(OperationContextImpl.java:2612) at org.jboss.as.clustering.controller.BinaryRequirementServiceNameFactory.getServiceName(BinaryRequirementServiceNameFactory.java:50) at org.jboss.as.clustering.controller.DefaultableBinaryServiceNameFactoryProvider.getServiceName(DefaultableBinaryServiceNameFactoryProvider.java:49) at org.jboss.as.clustering.controller.BinaryServiceNameFactory.getServiceName(BinaryServiceNameFactory.java:61) at org.jboss.as.clustering.infinispan.subsystem.CacheMetricExecutor.execute(CacheMetricExecutor.java:56) at org.jboss.as.clustering.infinispan.subsystem.CacheMetricExecutor.execute(CacheMetricExecutor.java:40) at org.jboss.as.clustering.controller.MetricHandler.executeRuntimeStep(MetricHandler.java:75)