[Oisf-users] High Suricata capture.kernel_drops

Cloherty, Sean E scloherty at mitre.org
Wed Jul 11 18:05:46 UTC 2018

Well I am using HS, but it looks like Fatema is using RHEL or CENTOS and getting HS installed and recompiling isn't that much of a quick hit.

-----Original Message-----
From: Eric Leblond [mailto:eric at regit.org] 
Sent: Wednesday, July 11, 2018 13:45 PM
To: Cloherty, Sean E <scloherty at mitre.org>; fatema bannatwala <fatema.bannatwala at gmail.com>; oisf-users at lists.openinfosecfoundation.org
Subject: Re: [Oisf-users] High Suricata capture.kernel_drops



On Wed, 2018-07-11 at 14:53 +0000, Cloherty, Sean E wrote:
> Hello Fatema -
> SEPTun is a great resource for sure and from that you might want to 
> focus first on the CPU affinity and only include those in the same 
> NUMA node as the NIC for workers.  (See SEPTun page 14)
> Some other quick hits –
> Set threads to auto and specify which CPUs (by number or range of #s) 
> instead of “all” for the workers to use.  Also – I think you can 
> choose to use CPUs not on the same NUMA node for the management-cpu- 
> set so you can save the rest for workers.
> Install the NIC driver from Intel
> In AF-PACKET – enable tpacketv3
> Change the MPM-ALGO to AC-KS

Why are you not using hyperscan? It is supposed to have better performance than the previous algorithms.

Eric Leblond <eric at regit.org>

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