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Documentation: reference/reference_lua/box_slab/slab_stats

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	box.slab.stats()
	Show a detailed memory usage report (in bytes) for the slab allocator. The report is broken down into groups by data item size as well as by slab size (64-byte, 136-byte, etc). The report includes the memory allocated for storing both tuples and indexes.
	return
	``mem_free`` is the allocated, but currently unused memory;
	``mem_used`` is the memory used for storing data items (tuples and indexes);
	``item_count`` is the number of stored items;
	``item_size`` is the size of each data item;
	``slab_count`` is the number of slabs allocated;
	``slab_size`` is the size of each allocated slab.
	rtype
	table
	Example:
	Here is a sample report for the first group:
	tarantool> box.slab.stats()[1] --- - mem_free: 16232 mem_used: 48 item_count: 2 item_size: 24 slab_count: 1 slab_size: 16384 ...
	This report is saying that there are 2 data items (``item_count`` = 2) stored in one (``slab_count`` = 1) 24-byte slab (``item_size`` = 24), so ``mem_used`` = 2 * 24 = 48 bytes. Also, ``slab_size`` is 16384 bytes, of which 16384 - 48 = 16232 bytes are free (``mem_free``).
	A complete report would show memory usage statistics for all groups:
	tarantool> box.slab.stats() --- - - mem_free: 16232 mem_used: 48 item_count: 2 item_size: 24 slab_count: 1 slab_size: 16384 - mem_free: 15720 mem_used: 560 item_count: 14 item_size: 40 slab_count: 1 slab_size: 16384 <...> - mem_free: 32472 mem_used: 192 item_count: 1 item_size: 192 slab_count: 1 slab_size: 32768 - mem_free: 1097624 mem_used: 999424 item_count: 61 item_size: 16384 slab_count: 1 slab_size: 2097152 ...
	The total ``mem_used`` for all groups in this report equals ``arena_used`` in :doc:`/reference/reference_lua/box_slab/slab_info` report.

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