ed,freed}"": amount of active memory.


""inactive_split.{all,large_pool,small_pool}.{current,peak,alloc
     ated,freed}"": number of inactive, non-releasable memory blocks.


""inactive_split_bytes.{all,large_pool,small_pool}.{current,peak
     ,allocated,freed}"": amount of inactive, non-releasable memory.


For these core statistics, values are broken down as follows.
Pool type:


"all": combined statistics across all memory pools.


"large_pool": statistics for the large allocation pool (as of
     October 2019, for size >= 1MB allocations).


"small_pool": statistics for the small allocation pool (as of
     October 2019, for size < 1MB allocations).


Metric type:


"current": current value of this metric.


"peak": maximum value of this metric.


"allocated": historical total increase in this metric.


"freed": historical total decrease in this metric.


In addition to the core statistics, we also provide some simple
   event counters: