Can a Haskell/GHC self-report its GC stats live?

Question

I'm thinking that having a server to self-report its memory usage would be handy.

I have read the section on memory profiling in the manual, but there are a few drawbacks with this:

• First this seems to give only post-mortem stats.
• There is an overhead associated with enabling profiling.
• I don't really need that much detail.

So that's my question, how can one track the different sets of memory in a running program compiled by GHC?

Answer 1

If you integrate ekg into your server, you can access nice graphs and statistics about the runtime and even your own custom metrics via HTTP:

(Image linked from Oliver Charles’ blogpost on ekg)