PERFCTR_COUNTER(GC_PROM0SEC, "Gen 0 Promoted Bytes/Sec", "", RateOfCountsPerSecond32, gc_promotions0)
PERFCTR_COUNTER(GC_PROM1SEC, "Gen 1 Promoted Bytes/Sec", "", RateOfCountsPerSecond32, gc_promotions1)
PERFCTR_COUNTER(GC_PROMFIN, "Promoted Finalization-Memory from Gen 0", "", NumberOfItems32, gc_promotion_finalizers)
-PERFCTR_COUNTER(GC_GEN0SIZE, "Gen 0 heap size", "", NumberOfItems32, gc_gen0size)
-PERFCTR_COUNTER(GC_GEN1SIZE, "Gen 1 heap size", "", NumberOfItems32, gc_gen1size)
-PERFCTR_COUNTER(GC_GEN2SIZE, "Gen 2 heap size", "", NumberOfItems32, gc_gen2size)
+PERFCTR_COUNTER(GC_GEN0SIZE, "Gen 0 heap size", "", NumberOfItems64, gc_gen0size)
+PERFCTR_COUNTER(GC_GEN1SIZE, "Gen 1 heap size", "", NumberOfItems64, gc_gen1size)
+PERFCTR_COUNTER(GC_GEN2SIZE, "Gen 2 heap size", "", NumberOfItems64, gc_gen2size)
PERFCTR_COUNTER(GC_LOSIZE, "Large Object Heap size", "", NumberOfItems32, gc_lossize)
PERFCTR_COUNTER(GC_FINSURV, "Finalization Survivors", "", NumberOfItems32, gc_fin_survivors)
PERFCTR_COUNTER(GC_NHANDLES, "# GC Handles", "", NumberOfItems32, gc_num_handles)
PERFCTR_COUNTER(GC_BYTESSEC, "Allocated Bytes/sec", "", RateOfCountsPerSecond32, gc_allocated)
PERFCTR_COUNTER(GC_INDGC, "# Induced GC", "", NumberOfItems32, gc_induced)
PERFCTR_COUNTER(GC_PERCTIME, "% Time in GC", "", RawFraction, gc_time)
-PERFCTR_COUNTER(GC_BYTES, "# Bytes in all Heaps", "", NumberOfItems32, gc_total_bytes)
-PERFCTR_COUNTER(GC_COMMBYTES, "# Total committed Bytes", "", NumberOfItems32, gc_committed_bytes)
-PERFCTR_COUNTER(GC_RESBYTES, "# Total reserved Bytes", "", NumberOfItems32, gc_reserved_bytes)
+PERFCTR_COUNTER(GC_BYTES, "# Bytes in all Heaps", "", NumberOfItems64, gc_total_bytes)
+PERFCTR_COUNTER(GC_COMMBYTES, "# Total committed Bytes", "", NumberOfItems64, gc_committed_bytes)
+PERFCTR_COUNTER(GC_RESBYTES, "# Total reserved Bytes", "", NumberOfItems64, gc_reserved_bytes)
PERFCTR_COUNTER(GC_PINNED, "# of Pinned Objects", "", NumberOfItems32, gc_num_pinned)
PERFCTR_COUNTER(GC_SYNKB, "# of Sink Blocks in use", "", NumberOfItems32, gc_sync_blocks)