JVM里有一系列的跟踪相关的参数,如下图(JAVA 8)
bool TraceBiasedLocking = false {product} bool TraceClassLoading = false {product rw} bool TraceClassLoadingPreorder = false {product} bool TraceClassPaths = false {product} bool TraceClassResolution = false {product} bool TraceClassUnloading = false {product rw} bool TraceDynamicGCThreads = false {product} bool TraceExceptions = false {product} bool TraceGen0Time = false {product} bool TraceGen1Time = false {product} ccstr TraceJVMTI = {product} bool TraceLoaderConstraints = false {product rw} bool TraceMetadataHumongousAllocation = false {product} bool TraceMonitorInflation = false {product} bool TraceParallelOldGCTasks = false {product} intx TraceRedefineClasses = 0 {product} bool TraceSafepointCleanupTime = false {product} bool TraceSharedLookupCache = false {product} bool TraceSuspendWaitFailures