• Bug
  • Status: Resolved
  • 2 Major
  • Resolution: Fixed
  • ehcache-core
  • lorban
  • Reporter: gkeim
  • October 25, 2013
  • 0
  • Watchers: 3
  • December 20, 2013
  • October 30, 2013

Description

Run the trunk EhcachePounder (https://svn.terracotta.org/repo/forge/projects/labs/EhcachePounder/trunk).

Case ‘standalone entries’

Import configurations/standalone-entries.xml.

  • That configuration defines 3 non-clustered caches, each with maxEntriesLocalHeap and maxEntriesLocalDisk > 0. There are no pools defined at the CacheManager level.

Put a breakpoint on DefaultSizeOfEngine.sizeOf. Use the TMC to monitor this cluster. Go to the AppData|Charts page.

This stacktrace indicates sizeOf being used:

DefaultSizeOfEngine.sizeOf(Object, Object, Object) line: 192	
OnHeapCachingTier<K,V>.getInMemorySizeInBytes() line: 257	
NativeMethodAccessorImpl.invoke0(Method, Object, Object[]) line: not available [native method]	
NativeMethodAccessorImpl.invoke(Object, Object[]) line: 57	
DelegatingMethodAccessorImpl.invoke(Object, Object[]) line: 43	
Method.invoke(Object, Object...) line: 606	
StatisticsManager$MethodCallable<T>.call() line: 113	
PassThroughStatistic<T>.value() line: 63	
StatisticSampler$SamplingTask<T>.run() line: 105	
Executors$RunnableAdapter<T>.call() line: 471	
ScheduledThreadPoolExecutor$ScheduledFutureTask<V>(FutureTask<V>).runAndReset() line: 304	
ScheduledThreadPoolExecutor$ScheduledFutureTask<V>.access$301(ScheduledThreadPoolExecutor$ScheduledFutureTask) line: 178	
ScheduledThreadPoolExecutor$ScheduledFutureTask<V>.run() line: 293	
ScheduledThreadPoolExecutor(ThreadPoolExecutor).runWorker(ThreadPoolExecutor$Worker) line: 1145	
ThreadPoolExecutor$Worker.run() line: 615	
Thread.run() line: 744

Case ‘clustered entries’

Import configurations/clustered-entries.xml.

  • This configuration defaults 3 clustered caches, each specifying maxEntriesLocalHeap > 0 with no pools defined at the CacheManager level.

Browser to Charts panel again.

This stacktrace indicates sizing is occuring:

DefaultSizeOfEngine.sizeOf(Object, Object, Object) line: 192	
MemoryStore.getInMemorySizeInBytes() line: 781	
GeneratedMethodAccessor60.invoke(Object, Object[]) line: not available	
DelegatingMethodAccessorImpl.invoke(Object, Object[]) line: 43	
Method.invoke(Object, Object...) line: 606	
StatisticsManager$MethodCallable<T>.call() line: 113	
PassThroughStatistic<T>.value() line: 63	
SemiExpiringStatistic<T>(AbstractStatistic<T>).value() line: 57	
SemiExpiringStatistic<T>.value() line: 33	
StatisticsGateway.getLocalHeapSizeInBytes() line: 321	
Cache.calculateInMemorySize() line: 2633	
InternalClassLoaderAwareCache(ClassLoaderAwareCache).calculateInMemorySize() line: 300	
OnlineEhcacheSMLocalStore.getOnHeapSizeInBytes() line: 130	
EhcacheSMLocalStore.getOnHeapSizeInBytes() line: 177	
L1ServerMapLocalCacheStoreImpl<K,V>.onHeapSizeInBytes() line: 82	
ServerMapLocalCacheImpl.onHeapSizeInBytes() line: 702	
TCObjectServerMapImpl<L>.getLocalOnHeapSizeInBytes() line: 1093	
ExplicitLockingTCObjectServerMapImpl.getLocalOnHeapSizeInBytes() line: 375	
ServerMap<K,V>.localOnHeapSizeInBytes() line: 1234	
AggregateServerMap<K,V>.localOnHeapSizeInBytes() line: 800	
ToolkitCacheImpl<K,V>.localOnHeapSizeInBytes() line: 495	
GeneratedMethodAccessor59.invoke(Object, Object[]) line: not available	
DelegatingMethodAccessorImpl.invoke(Object, Object[]) line: 43	
Method.invoke(Object, Object...) line: 606	
NonStopInvocationHandler<T>.invokeMethod(Method, Object[], Object) line: 140	
NonStopInvocationHandler<T>.invoke(Object, Method, Object[]) line: 41	
$Proxy17.localOnHeapSizeInBytes() line: not available	
EnterpriseClusteredStore(ClusteredStore).getInMemorySizeInBytes() line: 518	
GeneratedMethodAccessor58.invoke(Object, Object[]) line: not available	
DelegatingMethodAccessorImpl.invoke(Object, Object[]) line: 43	
Method.invoke(Object, Object...) line: 606	
StatisticsManager$MethodCallable<T>.call() line: 113	
PassThroughStatistic<T>.value() line: 63	
StatisticSampler$SamplingTask<T>.run() line: 105	
Executors$RunnableAdapter<T>.call() line: 471	
ScheduledThreadPoolExecutor$ScheduledFutureTask<V>(FutureTask<V>).runAndReset() line: 304	
ScheduledThreadPoolExecutor$ScheduledFutureTask<V>.access$301(ScheduledThreadPoolExecutor$ScheduledFutureTask) line: 178	
ScheduledThreadPoolExecutor$ScheduledFutureTask<V>.run() line: 293	
ScheduledThreadPoolExecutor(ThreadPoolExecutor).runWorker(ThreadPoolExecutor$Worker) line: 1145	
ThreadPoolExecutor$Worker.run() line: 615	
Thread.run() line: 744

Comments

Ludovic Orban 2013-10-30

This happens because cache attributes (/agents/cacheManagers/caches) do exclude on-heap size in bytes stats when a cache is configured count-based while cache statistics (/agents/cacheManagers/caches/statistics/samples) don’t.

I added some code to CacheStatisticSampleEntityBuilder to perform the same kind of exclusion as CacheEntityBuilder does, ie: no on-heap size in bytes stat for count-based caches.

Ludovic Orban 2013-10-30

Backported fix to ehcache 2.7.x branch, r8400.