Modify Golang Maximum memory limit

This is a creation in Article, where the information may have evolved or changed. Excerpted from Golang Nut

You can tune the mheapmap_bits in Malloc.h and arena_size on MALLOC.GOC to reducememory usage, as long as they statisfy th is: (1UL << (mheapmap_bits)) >= arena_size(for example, I changed mheapmap_bits to, and arena_size to ' 4ll<<30 ', all testspassed, and the size of BSS secti ONS is dropped to about 10MB for Bin/go: linux-amd64 Go $ size Bin/go # before text data BSS Dec hex filename 4491897 97552 33672424 38261873 247d471 bin/go linux-amd64 Go $ size Bin/go # after text data BSS Dec hex filename 4491924 97552 8506600 13096076 c7d48c bin/go)
And for the record, this problem was not caused by the reserved VM space (which was 16GBon 64-bit hosts, as they are mapped With Prot_none, i.e, they won ' t maps to any physicalmemory). Its real cause is the big runtime.mheap.

$ VI malloc.hmheapmap_bits=16
$ VI malloc.gocarena_size=1ll<<28
$ go install-a-v Stdthen rebuilt my app which reduce its VPS footprint from 60MB to 20MB!!!
Previously:mheapmap_bits=19arena_size=1ll<<28reduced the footprint to 24MB, so I imagine going lower have diminishin G returns.
I can ' t help but wonder, if the memory usage was a bug, or whether these memory settings should be made available as flags  In go build, or sometime in the future, the runtime'll probably be improved to make good choices automatically. Is it worth putting in a feature Request/bug report?
Given that the apps RSS are 2.5MB, I ' m thinking the total footprint should be around 5-10MB? If So, there's probably more work to do and I would is happy to test.
However, knocking off ~70% of the RAM requirements is absolutely fantastic, so thanks everyone for your time and helpful s Uggestions.
Cheers.