The exact command i am using is :
tshark -r my_big_capture_file -T pdml -V | myprogram
It is tshark who is running out of memory (monitored). Could the pipe
have something to do with it ?
On Thu, Feb 28, 2008 at 7:12 PM, Guy Harris <guy@xxxxxxxxxxxx> wrote:
> Edouard Funke wrote:
>
> > We are currently using wireshark PDML export functionnality (with
> > custom plugins) to export big capture files to be processed after.
> > We are constantly "hitting" the out of memory problem
> > (http://wiki.wireshark.org/KnownBugs/OutOfMemory) as wireshark keeps
> > information on packet list and for tcp reassembly among others
> > things...
>
> So are you saying that Wireshark is running out of memory trying to
> *read* the capture, or are you saying that it can read the file but runs
> out of memory trying to export the capture as PDML?
>
> If the latter, that's a *different* out-of-memory problem, and one I, at
> least, wasn't aware of.
>
> If the former, at least one large consumer of memory is the memory for
> all the columns in the list of packets, so...
>
>
> > As we just want to export capture files in PDML, is there a way to
> > deactivate (in code or with options) these information in order to
> > process bigger captures ?
>
> ...you might try just using TShark with "-T pdml" rather than Wireshark;
> as TShark doesn't have a display of all the columns (it only prints one
> column at a time, and only does that if run without "-V" or "-T"), it
> won't consume memory for that.
>
> It does consume memory for reassembly and other dissection-related
> operations, just as Wireshark does, so using TShark might not be enough.
> However, disabling *that* would cause packets to be dissected
> differently, and the PDML you get from that might not be the PDML you
> want (for example, it wouldn't dissect PDUs split across multiple
> link-layer packets correctly).
>
>
> > I dont know if i am asking the question in the right mailing list,
> > maybe wireshark-users ?
>
> wireshark-users was probably the right list on which to start asking
> about this.
>
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