Re: Linux vs FreeBSD Performance

bismark@foofus.net wrote:
> I'm running the current version of nessus on an x86_64 linux system and 
> was comparing it to my coworker who runs FreeBSD.  We both have the same 
> hardware but he can have his system set to 70/30 on the hosts/checks and 
> still have an extremely response system and no false positives in the 
> scan results. If I try to even set anything close to those my system 
> grinds to a halt and the results are extremely suspect.
>
> The question I have is what tuning can I do on Linux systems to make the 
> performance somewhat similar.  I'm guessing that I won't be able to  match
> it because of the differences between the OS's network stack and  kernel.

Hello,

When you say same hardware, is it the exact same memory,
CPU, disk, .etc?

Are you running any extra applications on your Linux system
such as a network monitor or a network IDS? What about a local
firewall logging all connections in/out?

Also, are you running the same exact scan configurations? You
mention 70/30 hosts/checks, but I would be curious if you are
also comparing the same scan configurations such as thorough
checks.

Lastly, I would also compare any process loads on the FreeBSD
system to the Linux system.

We've been very wary at Tenable to produce any sort of "this
OS is faster than this OS" type of guidelines because there
are many variables to consider.

Ron Gula
Tenable Network Security








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