Document new metrics introduced in 3.2

[andreyaksenov]

Related dev. PR(s): tarantool/tarantool#10220

Product: Tarantool
Since: 3.2
Root document:
SME: @ DifferentialOrange

Details

The updated metrics module includes the following new metrics:

• vinyl: add statistic for total size of memory occupied by tuples tarantool#9059
• Memtx read view statistics tarantool#8501

[DifferentialOrange]

Seems that it will be in Tarantool 3.2.0, but it will not be backported to 3.1.1

[lenkis]

• vinyl: add statistic for total size of memory occupied by tuples tarantool#9059 -- closed via commit 05f4b25
• Memtx read view statistics tarantool#8501 -- info already in the doc, no action needed.