Wireshark-dev: Re: [Wireshark-dev] PDML export on big capture files
From: "Edouard Funke" <[email protected]>
Date: Fri, 29 Feb 2008 14:57:41 +0100
I ran a test with and without options on a 600Mo capture file: the
result is the same, tshark takes 400Mo of memory. Is it normal ?

On Fri, Feb 29, 2008 at 12:31 PM, Edouard Funke <[email protected]> wrote:
> Thanks for all the information, i will try these options and see if
>  there is no more memory problem.
>
>  For now our plugins do not use reassembly but it is feature that we
>  might want to implement soon. We might face the same problems then, a
>  quick fix would be to split capture files but as we are trying to
>  "follow" streams it is still a problem.
>
>
>
>  On Fri, Feb 29, 2008 at 12:14 PM, Guy Harris <[email protected]> wrote:
>  > Edouard Funke wrote:
>  >  > The same issue happens with "normal" tcp trafic without any custom
>  >  > plugin activated.
>  >  > How can i deactivate reassembly in this case ?
>  >
>  >  Try adding the command line flag
>  >
>  >         -o tcp.desegment_tcp_streams:false
>  >
>  >  which will turn off reassembly for protocols running over TCP.  You
>  >  could also try
>  >
>  >         -o ip.defragment:false -o ipv6.defragment:false
>  >
>  >  to turn off reassembly of fragmented IPv4 and IPv6 datagrams.
>  >
>  >
>  >  > How different would be my output ?
>  >
>  >  If the traffic is, for example, HTTP or SMB, it could be quite
>  >  different, as large HTTP replies, and SMB write requests and read
>  >  replies, are some examples of PDUs that would be split across TCP
>  >  segment boundaries.
>  >
>  >
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