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SoftEtherVPN / SoftEtherVPN

Cross-platform multi-protocol VPN software. Pull requests are welcome. The stable version is available at https://github.com/SoftEtherVPN/SoftEtherVPN_Stable.
Apache License 2.0
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High load on SoftEther server #969

Closed RonNabuurs closed 1 year ago

RonNabuurs commented 5 years ago

Prerequisites

SoftEther version: Version 5.01 Build 9671 Component: Server Operating system: Linux Architecture: 64 bit

Processor: Intel(R) Xeon(R) CPU E5-2630L 0 @ 2.00GHz Cores: 4 Memory: 8Gb

Description

I've got an SoftEtherVPN server running on my VPS, with about 450 users connected (via OpenVPN config). I'm experiencing high load on the server. This load fluctuates between high and medium values (i've attached a screenshot of my monitor).

Although the load is very high, the CPU usage seems fine, about 30/40% across all cores. Also memory usage is fine, about 2/3Gb of the total 8Gb.

After some digging around (and using netdata) I came netdev_budget, because time_squeeze value in /proc/net/softnet_stat kept increasing. I'm not sure if this has something to do with SoftEther, but the only network intensive process running on my server is SoftEther.

I also got an OpenVPN server running and I compared the value of /proc/net/softnet_stat with the SoftEther one and saw that the OpenVPN server had way less packets squeezed than the SoftEther server.

So my main question is, is it normal that I have such an high load on my server and is there something I can do (maybe in the configuration of SoftEther) to get the load values down?

And is it normal for a SoftEther server to send so many packets that alot of the get squeezed?

dnobori commented 5 years ago

In general, the load average value is lack of correctness.

It is recommended to check the the total sum of processing bandwidth. If the bandwidth suddenly decrease after the number of session exceeds 450, it is the scale-able problem. If not, there are no problem.

RonNabuurs commented 5 years ago

When I use nethogs for monitoring the traffic. Is not very busy at all. Around 200 KB/sec sent and 200KB/sec received. So I dont think its and bandwidth problem.

But I'm still not sure if it's ok that alot of my packets get squeezed, is it ok?

yx800 commented 2 months ago

When I use nethogs for monitoring the traffic. Is not very busy at all. Around 200 KB/sec sent and 200KB/sec received. So I dont think its and bandwidth problem.

But I'm still not sure if it's ok that alot of my packets get squeezed, is it ok?

I have a similar problem. Have you solved it?