Re: external PCRE configure option for apache2 and mod sec 2?

On 11/27/06, Dan Rossi <spam@xxxxxxxxxxxxxxxx> wrote:
>
>  Hi it seems after turning on mod sec the load on our high traffic apache
> server went up quite alot
>
>  CPU states: 49.6% user,  8.2% nice, 15.9% system,  0.5% interrupt, 25.8%
> idle
>  Mem: 588M Active, 106M Inact, 304M Wired, 31M Cache, 112M Buf, 1979M Free
>  Swap: 4096M Total, 93M Used, 4002M Free, 2% Inuse
>
>  from about 2%

The overhead of ModSecurity itself (e.g. without any rules) is low.
Depending on your configuration it could be one of the following:

 1) Too many rules, or rules that are slow.

 2) You have debug logging enabled (debug log level should be 0).

 3) Excessive audit logging.

-- 
Ivan Ristic

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