overhead of auditd

[杨海]

Hi Steve,


I ever read the document you wrote about laying IDS on top of auditd. And I suppose inotify could be lightweight for IDS. Any comment?


Best regards
Hai







 
------------------ Original ------------------
From:  "Steve Grubb"<sgrubb at redhat.com>;
Date:  Fri, Jul 12, 2019 08:14 PM
To:  "linux-audit"<linux-audit at redhat.com>; 
Cc:  "杨海"<hai.yang at magic-shield.com>; 
Subject:  Re: overhead of auditd

 

Hello,

On Thursday, July 11, 2019 11:23:45 PM EDT 杨海 wrote:
> Turning on all system calls in audit.rules, and transferring a tar file to
> the target system (CentOS 7, 4 cores), I found "auditd" consumes high CPU
> usage. Is it expected?

It would not be surprising. Some system calls have more overhead than others. 
So, depending on everything that is running, you can kill your system.

> BTW, after turning write-logs off, and add dispatcher, both "audispd" and
> "auditd" are consuming high CPU.

They have a lot of events to handle.

-Steve
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