[mem.res.pool.options]

size_t max_blocks_per_chunk;

The maximum number of blocks that will be allocated at once from the upstream memory resource ([mem.res.monotonic.buffer]) to replenish a pool.

If the value of max_blocks_per_chunk is zero or is greater than an implementation-defined limit, that limit is used instead.

The implementation may choose to use a smaller value than is specified in this member and may use different values for different pools.

size_t largest_required_pool_block;

The largest allocation size that is required to be fulfilled using the pooling mechanism.

Attempts to allocate a single block larger than this threshold will be allocated directly from the upstream memory resource.

If largest_required_pool_block is zero or is greater than an implementation-defined limit, that limit is used instead.

The implementation may choose a pass-through threshold larger than specified in this member.