Memory leak in Gobgp about gobgp HOT 5 CLOSED

I have created memory snapshot with gdb --pid=226 and gcore and could share with you:

397M Oct  8 19:08 core.226

from gobgp.

Thanks for the report (and sorry about the delay),

Surely, looks worrying. Let me try to reproduce here. You just configure a single peer and let it run for a week? No gRPC (and CLI commands)?

The number of processes also looks scary. How about the number of processes just after starting gobgp?

btw, I've just add the pprof support:
https://golang.org/pkg/net/http/pprof/

The following command gives an idea on who hogs memory:
$go tool pprof --text http://localhost:6060/debug/pprof/heap

from gobgp.

Hello!

Yes, we have only single peer but we have used gRPC from CLI tool.

Recently started tool looks like this:

root      8984  0.0  0.3 290236  7328 pts/1    Sl   16:21   0:00 /opt/gobgp_1_0_0/gobgpd -f /etc/gobgpd.conf
gobgpd---7*[{gobgpd}]

Nice idea about pprof!

from gobgp.

Sorry about the delay,

We added lots of routes and then remove them via gRPC. Seems no memory leak.
https://gist.github.com/fujita/cf526e8db0e082daf4f7#file-gistfile1-txt

RSS increased as the number of routes does, then RSS decreased as the number of routes does. As same as your observation, VIRT increased up to about 2G and didn't decrease. But VIRT isn't the amount of memory actually in use. Seems that what we observed is what we expect with golang.

Here is some info about how golang uses memory:
https://deferpanic.com/blog/understanding-golang-memory-usage/

from gobgp.

Hello!

I'm running GoBGP for ~1 weeks and it's looks like this:

root       260  0.0  0.3 1521048 8224 ?        Sl   Nov12   1:09 /usr/local/bin/gobgpd -f /etc/gobgpd.conf

So it's OK :) We actually haven't any memory leaks in awesome gobgp toolkit! Thanks for nice explanation of go's memory behavior.

from gobgp.