[Snort-users] "S5 pruned sessions from cache" messages

Joe S js.lists at ...11827...
Tue Apr 29 14:01:14 EDT 2008


Problem solved.

I set memcap in the preprocessor stream5_global to 134217728 (128 MB)

Thanks.


On Tue, Apr 29, 2008 at 10:56 AM, Martin Roesch <roesch at ...1935...> wrote:
> It means that you haven't allocated enough memory to stream5's memcap.
> Basically when it hits the memcap limit due to trying to track too many
> sessions at once you need to raise the memcap limit until you stop getting
> those notifications.  Try doubling it for starters and see what happens.
>
>  -Marty
>
>
>
>
> On Apr 29, 2008, at 1:52 PM, Joe S wrote:
>
>
> Correction: Running 2.8.1
>
>    ,,_     -*> Snort! <*-
>   o"  )~   Version 2.8.1 (Build 28)  FreeBSD
>    ''''    By Martin Roesch & The Snort Team: http://www.snort.org/team.html
>            (C) Copyright 1998-2008 Sourcefire Inc., et al.
>            Using PCRE version: 7.4 2007-09-21
>
>
> On Tue, Apr 29, 2008 at 10:50 AM, Joe S <js.lists at ...11827...> wrote:
> I'm running Snort 2.8.0.1 on FreeBSD 7.0 (i386) and I'm getting tons
>  of messages like this:
>
>  S5: Pruned 25 sessions from cache. 2870 ssns for memcap: 8387663/8388608
>  S5: Pruned 5 sessions from cache. 2877 ssns for memcap: 8235241/8388608
>  S5: Pruned 20 sessions from cache. 2964 ssns for memcap: 8388299/8388608
>  S5: Pruned 5 sessions from cache. 2959 ssns for memcap: 8388559/8388608
>  S5: Pruned 5 sessions from cache. 2954 ssns for memcap: 8387708/8388608
>  S5: Pruned 5 sessions from cache. 2947 ssns for memcap: 8387840/8388608
>  S5: Pruned 70 sessions from cache. 2877 ssns for memcap: 8387838/8388608
>  S5: Pruned 15 sessions from cache. 2862 ssns for memcap: 8388366/8388608
>  S5: Pruned 25 sessions from cache. 2837 ssns for memcap: 8388348/8388608
>  S5: Pruned 10 sessions from cache. 2827 ssns for memcap: 8388233/8388608
>  S5: Pruned 5 sessions from cache. 2822 ssns for memcap: 8387495/8388608
>  S5: Pruned 5 sessions from cache. 2817 ssns for memcap: 8360849/8388608
>  S5: Pruned 5 sessions from cache. 2826 ssns for memcap: 8388047/8388608
>  S5: Pruned 35 sessions from cache. 2793 ssns for memcap: 8387029/8388608
>
>  I've searched the archives, but have not found anything.
>
>  Why am I getting these messages?
>  What do they mean?
>
>
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> --
> Martin Roesch - Founder/CTO, Sourcefire Inc. - +1-410-290-1616
> Sourcefire - Security for the Real World - http://www.sourcefire.com
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