Mailing List Archive: serveriron XL loadbalancer using 100% cpu

serveriron XL loadbalancer using 100% cpu

May 6, 2005, 2:27 PM

Post #1 of 3 (811 views)

My company recently purchased a serverironxl loadbalancer (16 ports with
1 gigabit fiber port) we attached 16 webservers to the device and setup
the virtual and real servers appropriately everything was running fine
with the servers running stand alone no loadbalancing. Once we changed
dns to use the loadbalanced ips the cpu went to 99% and download speeds
decreased significantly. It was pushing about 700 mbits before
loadbalancing was turned on after we started using the load balancing
traffic went down 30%, there are a few hundred websites running on all
these servers.

So im wondering if this is just to much for the device to handle? I
would think it should not be a problem for it but im no expert. we have
another server iron pushing over 780 mbits but with fewer sites behind
it. So could it be the large number of sites overwhelming the device?
its running firmware ver Version 07.3.05T12

thanks in advance for any help
dave

serveriron XL loadbalancer using 100% cpu [ In reply to ]

tim at uksolutions

May 7, 2005, 4:28 AM

Post #2 of 3 (818 views)

Permalink

Dave,

Just wondering how many virtual IP addresses you have set-up? And how many
connections per second you are getting? The XL max throughput is 900 mpbs
according to technical specs.

I guess you could look at memory also?

HTH
Tim

----- Original Message -----
From: "David Morehead" <morehead@choopa.com>
To: <foundry-nsp at puck.nether.net>
Sent: Friday, May 06, 2005 7:29 PM
Subject: [f-nsp] serveriron XL loadbalancer using 100% cpu

> My company recently purchased a serverironxl loadbalancer (16 ports with
> 1 gigabit fiber port) we attached 16 webservers to the device and setup
> the virtual and real servers appropriately everything was running fine
> with the servers running stand alone no loadbalancing. Once we changed
> dns to use the loadbalanced ips the cpu went to 99% and download speeds
> decreased significantly. It was pushing about 700 mbits before
> loadbalancing was turned on after we started using the load balancing
> traffic went down 30%, there are a few hundred websites running on all
> these servers.
>
> So im wondering if this is just to much for the device to handle? I
> would think it should not be a problem for it but im no expert. we have
> another server iron pushing over 780 mbits but with fewer sites behind
> it. So could it be the large number of sites overwhelming the device?
> its running firmware ver Version 07.3.05T12
>
> thanks in advance for any help
> dave
> _______________________________________________
> foundry-nsp mailing list
> foundry-nsp at puck.nether.net
> http://puck.nether.net/mailman/listinfo/foundry-nsp
>

serveriron XL loadbalancer using 100% cpu [ In reply to ]

morehead at choopa

May 9, 2005, 3:57 PM

Post #3 of 3 (812 views)

Permalink

there are only 2 virtual IPs and on is for a group of 14 real servers 1
is for a group of 2 real servers but as i said there are hundreds of
websites running on these ips. I checked the memory and there is free
memory so im still kind of stumped.

Dynamic memory pool size: 29128800
Free memory size: 12043866

thanks
dave

Timothy Arnold wrote:

> Dave,
>
> Just wondering how many virtual IP addresses you have set-up? And how
> many connections per second you are getting? The XL max throughput is
> 900 mpbs according to technical specs.
>
> I guess you could look at memory also?
>
> HTH
> Tim
>
> ----- Original Message ----- From: "David Morehead" <morehead at choopa.com>
> To: <foundry-nsp at puck.nether.net>
> Sent: Friday, May 06, 2005 7:29 PM
> Subject: [f-nsp] serveriron XL loadbalancer using 100% cpu
>
>
>> My company recently purchased a serverironxl loadbalancer (16 ports with
>> 1 gigabit fiber port) we attached 16 webservers to the device and setup
>> the virtual and real servers appropriately everything was running fine
>> with the servers running stand alone no loadbalancing. Once we changed
>> dns to use the loadbalanced ips the cpu went to 99% and download speeds
>> decreased significantly. It was pushing about 700 mbits before
>> loadbalancing was turned on after we started using the load balancing
>> traffic went down 30%, there are a few hundred websites running on all
>> these servers.
>>
>> So im wondering if this is just to much for the device to handle? I
>> would think it should not be a problem for it but im no expert. we have
>> another server iron pushing over 780 mbits but with fewer sites behind
>> it. So could it be the large number of sites overwhelming the device?
>> its running firmware ver Version 07.3.05T12
>>
>> thanks in advance for any help
>> dave
>> _______________________________________________
>> foundry-nsp mailing list
>> foundry-nsp at puck.nether.net
>> http://puck.nether.net/mailman/listinfo/foundry-nsp
>>