8372412: Increase buffer size for ring-buffer events in CollectedHeap

Author: jsikstro

src/hotspot/share/gc/shared/collectedHeap.cpp

@@ -69,7 +69,7 @@ Klass* CollectedHeap::_filler_object_klass = nullptr;
 size_t CollectedHeap::_filler_array_max_size = 0;
 size_t CollectedHeap::_stack_chunk_max_size = 0;
 
-class GCLogMessage : public FormatBuffer<512> {};
+class GCLogMessage : public FormatBuffer<1024> {};
 
 template <>
 void EventLogBase<GCLogMessage>::print(outputStream* st, GCLogMessage& m) {