Expected memory usage of DocSzCache?

[egoldblum]

We recently upgraded from 2.26.3 to 2.28.7 and are observing much higher memory usage. Comparing v8 heap snapshots taken days apart suggests that Kadira.docSzCache may be responsible for the majority of the increase (~200mb).

What is the expected behavior of this feature with regards to memory usage?

I see that this cache is defaulting to 100000 items:

kadira/lib/kadira.js

Line 20 in 32b4ddc

Kadira.docSzCache = new DocSzCache(100000, 10);

Is there anyway to disable document size tracking and/or change this value to see the impact it has on memory usage?

[arunoda]

I think we can expose an option to configure it.
@roonyh could you work on this today?

[arunoda]

Introduced a new feature with v2.29.0.
See this PR for how to use it: #238