Hello!

We have a VPP router that hits the RAM max because of
VPP combined with the FRR bgpd process. After boot
a little more than 50 GB RAM is used, and then bgpd
starts eating RAM until VPP crashes when the server
RAM 64 GB is reached. I don't know at what point bgpd
would stop eating RAM if the server had more RAM.

Ubuntu 24.04.3

VPP 25.10, also tried with 25.06

Here are some things I have tried without noticeable effect:

GRUB_CMDLINE_LINUX="hugepagesz=1G hugepages=32 default_hugepagesz=1G"
GRUB_CMDLINE_LINUX="hugepagesz=1G hugepages=16 default_hugepagesz=1G"

VPP workers 4 or 3 or 2

VPP memory
==========
All default

or

main-heap-size 2G
main-heap-page-size default-hugepage

or

main-heap-page-size 1G
default-hugepage-size 1G


What would you recommend trying for less RAM usage?

I am using FRR 8.4.4-1.1ubuntu6.3, the default in that Ubuntu version,
but I will try installing a newer version of FRR.

(We have another server with identical hardware and
software, the same amount of VLANs, identical VPP
configuration and seemingly more BGP peers/prefixes,
that doesn't max out RAM. I don't know what differs
between these servers, except the order in which they
were put into use.)

Thanks!

Peter Olsson
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