Questions on pf limit table-entries PFR_KENTRY_HIWAT_SMALL

Hello!

I'm trying to understand the limits in PF, and I can't seem to figure
this out:

In pf.conf(5) I see two limits called table-entries, and one of them is

table-entries PFR_KENTRY_HIWAT_SMALL 100000

Some searching and I found:

grep PFR_KENTRY_HIWAT_SMALL /usr/include/net/pfvar.h
#define PFR_KENTRY_HIWAT_SMALL 100000 /* Number of entries for tiny
hosts */

What is a tiny host?

With the limit-item (table-entries) being used twice, does this somehow
only apply to some system configuration I'm not using since pfctl -sm
reports table-entries 200000?

Thank you,

Paul