Search crashing instead of paginating

[pendletons]

Hi,

I'm trying to search for appointment slots for a given order, and contrary to what the docs claim, pagination does not seem to be happening. If I search for a 1-day window of slots, I get 165 results back. If I search for any larger window, my server runs out of memory (it has 2GB allocated) and the process is killed.

Success:

irb(main):011:0> results= FHIR::STU3::Slot.search('_query' => 'SearchSlotForOrder', 'order' => '1758991', start: (Date.today + 1.day).to_s, end: (Date.today + 2.days).to_s)
I, [2024-04-18T10:05:46.570374 #10169]  INFO -- : GETTING: http://<server>/Slot?_query=SearchSlotForOrder&end=2024-04-20&order=1758991&start=2024-04-19
=> 
#<FHIR::STU3::Bundle:0x00007fdf9bc394c0
...
irb(main):012:0> results.total
=> 165
irb(main):012:0> results.next_bundle
=> nil

Failure:

irb(main):013:0> results= FHIR::STU3::Slot.search('_query' => 'SearchSlotForOrder', 'order' => '1758991', start: (Date.today + 1.day).to_s, end: (Date.today + 3.days).to_s)
I, [2024-04-18T10:01:37.394239 #8541]  INFO -- : GETTING: http://<server>/Slot?_query=SearchSlotForOrder&end=2024-04-21&order=1758991&start=2024-04-19
Killed

Is there a way to limit a bundle size (165+ seems large for pagination), and how do I actually force pagination to happen, since it doesn't seem to be happening here?