Describe the bug
I am running tile38 on production. For my use cases I have 1 million hooks and geofences defined. Everything works as expected except that I am getting memory issues.
Heap size is never coming down, even after running manual GC it is not releasing the heap.
To Reproduce
Steps to reproduce the behavior:

1. Add any object to tile38.
2. Run the server command on cli and check for the heap_size. Now run FLUSHDB , AOFSHRINK and GC .
3. Check size again with the server command.
   {"ok":true,"stats":{"aof_size":0,"avg_item_size":0,"cpus":2,"heap_released":204906496,"heap_size":2152414904,"http_transport":true,"id":"d8d9d1384aecd4f2a9366f3a26a4ad71","in_memory_size":0,"max_heap_size":2147483648,"mem_alloc":2152414904,"num_collections":0,"num_hooks":0,"num_objects":0,"num_points":0,"num_strings":0,"pending_events":0,"pid":22895,"pointer_size":8,"read_only":false,"threads":8,"version":"1.30.2"},"elapsed":"302.034µs"}

Everything comes down to 0 except the heap_size which is not coming down. Only after restart it comes down again
After restart ->

{"ok":true,"stats":{"aof_size":0,"avg_item_size":0,"cpus":10,"heap_released":1253376,"heap_size":4058800,"http_transport":true,"id":"1bea22bb0e8946896b1ff9f0024a9133","in_memory_size":0,"max_heap_size":0,"mem_alloc":4058800,"num_collections":0,"num_hooks":0,"num_objects":0,"num_points":0,"num_strings":0,"pending_events":0,"pid":37223,"pointer_size":8,"read_only":false,"threads":16,"version":"1.30.2"},"elapsed":"682.042µs"}

Expected behavior
Ideally it should come down, or after running GC it should release it. But does not

Operating System (please complete the following information):

• OS: Linux
• Version: latest
• ec2 instance

How can i fix this? Am i missing anything ?