I have a service written in go that takes 6-7G memory at runtime (RES in top). So I used the pprof tool trying to figure out where the problem is.
go tool pprof --pdf http://<service>/debug/pprof/heap > heap_prof.pdf
But there are only about 1-2G memory in result ('Total MB' in pdf). Where's the rest ?
And I've tried profile my service with GOGC=off, as a result the 'Total MB' is exactly the same as 'RES' in top. It seems that memory is GCed but haven't been return to kernel won't be profiled.
Any idea?
P.S, I've tested in both 1.0.3 and 1.1rc3.