This counter displays the current size of the Large Object Heap in bytes. Objects greater than a threshold are treated as ...

This counter displays the current size of the Large Object Heap in bytes. Objects greater than a threshold are treated as large objects by the Garbage Collector and are directly allocated in a special heap; they are not promoted through the generations. In CLR v1.1 and above this threshold is equal to 85000 bytes. This counter is updated at the end of a GC; it's not updated on every allocation.