tg-search limit for serialized metadata [was #23752]
when using extensive metadata (either in custom filed or by using any regular metadata filed), tg-search runs out of memory when requesting these objects (when requesting aggregated by root or by any aggregation).
the limit is now set to 3000 objects, but instead a limit by "file size" will catch these errors.
a query for object metadata exceeding the size of free heap space, will may be cause an service outage of tg-search.