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Insufficient utilization of large memory in go 1.14.3 #40440

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sxfworks opened this issue Jul 28, 2020 · 1 comment
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Insufficient utilization of large memory in go 1.14.3 #40440

sxfworks opened this issue Jul 28, 2020 · 1 comment

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@sxfworks
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@sxfworks sxfworks commented Jul 28, 2020

Use the top and ps commands to check that the process uses 221.6+G of memory, but check inuse_heap through the go tool pprof command to show that 179.1G is used. How to check the usage of another 40+G of memory

What version of Go are you using (go version)?

$ go version
go version go1.14.3 linux/amd64

Does this issue reproduce with the latest release?

yes

What operating system and processor architecture are you using (go env)?

go env Output
$ go env
GO111MODULE="auto"
GOARCH="amd64"
GOBIN=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOINSECURE=""
GOOS="linux"
GOTMPDIR=""
GOTOOLDIR="/opt/go/go/pkg/tool/linux_amd64"
GCCGO="gccgo"
AR="ar"
CC="gcc"
CXX="g++"
CGO_ENABLED="1"
GOMOD=""
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -m64 -pthread -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build634190532=/tmp/go-build -gno-record-gcc-switches"

What did you do?

I set GODEBUG=madvdontneed=1 in the process startup, but it has no effect.

$ cat /proc/sys/vm/overcommit_memory
0
$ cat /proc/sys/vm/overcommit_ratio
50
$ ulimit -v
unlimited

What did you expect to see?

What did you see instead?

@cagedmantis
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@cagedmantis cagedmantis commented Jul 28, 2020

We don't really use our issue tracker for questions. More people will see your question, and you will get better answers, if you ask on a forum rather than on the issue tracker. See https://golang.org/wiki/Questions.

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