[mod_python] mod_python 3.3.1 memory leak?

Graham Dumpleton graham.dumpleton at gmail.com
Tue Jul 3 04:19:31 EDT 2007

On 03/07/07, yubing <trueice at gmail.com> wrote:
> Our project has a live HTTP video streamer written in python, which keeps
> pumping a stream out to the client.
> The HTTP serving module is a simple mod_python request handler running on
> Apache 2.2.4 with mod_python 3.3.1 (Python 2.5.1).
> The stream is read out of our streaming server via TCP socket, and the
> python script just do some simple processing like header building, each
> allocated buffer is del-ed after being used.
> The problem is:
> We observed that after its running serveral hours, its memory occupation
> grows up to serveral hundreds of megabytes and keeps growing in 4k-8k
> increment every 1-2 seconds.
> Below is a simple testing scriptlet, the memory leaking issue is not so
> serious as our live serving module, but you can still observe 4k memory
> growing every serveral seconds.
> Could anyone help me to figure out the root cause of this issue?
> --------------------------
> import time
> def pump_file(req):
>     while(True):
>         fp = open("/dev/zero", "r")
>         buf = fp.read(4096)
>         try:
>             req.write(buf)
>             del buf
>             time.sleep(0.1)
>         except:
>             fp.close()
>             break

BTW, you do realise that you open the file in the loop when it should
be outside.


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