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Hi,
1. There is only one, bidirectional vpn connection between project networks in two regions
2. there is no (or almost no) traffic on this vpn link
3. second region is on one host (kolla all-in-one) and situation looks the same- with vpn service enabled there is excessive Memory use (growing also about 5-6MB/ minute and forcing the system to use swapfile)

there is no big cpu usage (ofcourse also due to no traffic inside VPN)
 It's the same case even if there's no vpn connection configured.
Best regards
Adam Tomas
Wysłane z iPhone'a

> Wiadomość napisana przez Vinh Nguyen Duc <vinhducnguyen1708 at gmail.com> w dniu 29.06.2021, o godz. 11:04:
> 
> 
> Hi Adam,
> Do you think the VPN connection is use CPU and memory to encrypt the VPN traffic? 
> 
> On Mon, Jun 28, 2021 at 14:30 Adam Tomas <bkslash at poczta.onet.pl <mailto:bkslash at poczta.onet.pl>> wrote:
> Hi,
> I have problem with neutron vpnaas - after enabling vpnaas plugin everything was ok at first. I was able to create VPN connection and communication is correct. But after a week of running vpnaas (only one VPN connection created/working!) I’ve noticed, that neutron-vpnaas takes more and more memory. I have 5 processes on each controller (there should be always five? Or it is changing dynamically?):
> 
> 42435    1545384  0.6  8.6 5802516 5712412 ?     S    Jun15 110:50 /var/lib/kolla/venv/bin/python3.8 /var/lib/kolla/venv/bin/neutron-server --config-file /etc/neutron/neutron.conf --config-file /etc/neutron/plugins/ml2/ml2_conf.ini --config-file /etc/neutron/neutron_vpnaas.conf
> 42435    1545389  0.6  8.5 5735832 5645856 ?     S    Jun15 112:16 /var/lib/kolla/venv/bin/python3.8 /var/lib/kolla/venv/bin/neutron-server --config-file /etc/neutron/neutron.conf --config-file /etc/neutron/plugins/ml2/ml2_conf.ini --config-file /etc/neutron/neutron_vpnaas.conf
> 42435    1545378  0.5  8.5 5734192 5643620 ?     S    Jun15 108:09 /var/lib/kolla/venv/bin/python3.8 /var/lib/kolla/venv/bin/neutron-server --config-file /etc/neutron/neutron.conf --config-file /etc/neutron/plugins/ml2/ml2_conf.ini --config-file /etc/neutron/neutron_vpnaas.conf
> 42435    1545372  0.5  8.5 5731128 5641436 ?     S    Jun15 109:07 /var/lib/kolla/venv/bin/python3.8 /var/lib/kolla/venv/bin/neutron-server --config-file /etc/neutron/neutron.conf --config-file /etc/neutron/plugins/ml2/ml2_conf.ini --config-file /etc/neutron/neutron_vpnaas.conf
> 42435    1545369  0.6  8.4 5637084 5547392 ?     S    Jun15 114:21 /var/lib/kolla/venv/bin/python3.8 /var/lib/kolla/venv/bin/neutron-server --config-file /etc/neutron/neutron.conf --config-file /etc/neutron/plugins/ml2/ml2_conf.ini --config-file /etc/neutron/neutron_vpnaas.conf
> 
> now neutron_server takes over 27G of RAM on each controller:
> 
> neutron_server         running  10.2  27.2G
> 
> After stopping all neutron containers and starting it again neutron takes a lot less memory:
> 
> neutron_server         running   0.5   583M
> 
> but memory usage keeps growing (about 5-6 M every minute).
> What’s wrong? When I disable vpnaas globally there’s no problem with excessive memory usage, so it’s vpnaas for sure…
> 
> Best regards
> Adam Tomas
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