[RP-PPPoE] Very high CPU usage by the pppoe-server

[Dardan Behluli]

The machine has 2.5GB of RAM and, for the moment, there is no swapping. The tool top shows that the pppoe-server process uses the CPU the most.
As I mentioned in the first post, the other PPPoE servers, about 15 of them with the same hardware, show much better performance with the same and even higher number of users connected. The difference in configuration is that this one has no NAT. Can this be the cause, in some strange way?

Thanks again,
Dardan

-----Original Message-----
From: rp-pppoe-bounces at lists.roaringpenguin.com [mailto:rp-pppoe-bounces at lists.roaringpenguin.com] On Behalf Of David F. Skoll
Sent: Thursday, March 31, 2011 1:00 PM
To: rp-pppoe at lists.roaringpenguin.com
Subject: Re: [RP-PPPoE] Very high CPU usage by the pppoe-server

On Thu, 31 Mar 2011 11:31:22 +0200
Dardan Behluli <Dardan.Behluli at ipko.com> wrote:

> One of our several PPPoE servers has very high CPU usage. This occurs
> basically when the number of users terminated reaches 1300 - 1500.
> With more than 1500 users connected the server is practically
> inaccessible.

Remember, you run one pppd process per user.  How much RAM does your
machine have?  If it ever starts swapping, performance goes down
dramatically.

I would guess it's all the pppd processes and context-switching eating
up your CPU rather than the pppoe-server process itself.

Regards,

David.
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