PROCESS_MEMORY_CACHE_TTL cannot be large than int32

[TillaTheHun0]

Background

The CU LRU In-Memory cache TTL can be configured using the PROCESS_MEMORY_CACHE_TTL. Underneath the hood, a cached record's ttl is implemented using a simple setTimeout

Problem

NodeJS' setTimeout is implemented as a subroutine that uses a signed 32 bit integer to store the timeout time, in milliseconds. This means the maximum value for PROCESS_MEMORY_CACHE_TTL is 2^31 - 1 or ~25 days.

Setting PROCESS_MEMORY_CACHE_TTL to a higher value will cause Node to emit a warning and then implicitly overflow the integer. Subsequently, the setTimeout will be given a negative value and immediately be invoked. Basically disabling the LRU In-Mmeory cache.

Solution

We'd like to allow larger values for PROCESS_MEMORY_CACHE_TTL. Can probably use something like long-timeout which abstracts recursively calling setTimeout to allow for setting longer timeouts.

Developer Notes

Code to modified is here

[dtfiedler]

i'l pick this up @TillaTheHun0

[TillaTheHun0]

Awesome, thanks @dtfiedler !