# TCP window size with RTMP live streaming

**URL:** <https://community.wowza.com/t/tcp-window-size-with-rtmp-live-streaming/36525>\
**Category:** Wowza Streaming Engine\
**Created:** [May 2, 2011, 7:11pm UTC](https://community.wowza.com/t/tcp-window-size-with-rtmp-live-streaming/36525 "2011-05-02T19:11:53Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Nicolas\_Bouillot](https://avatars.discourse-cdn.com/v4/letter/n/a6a055/32.png) [@Nicolas\_Bouillot](https://community.wowza.com/u/Nicolas_Bouillot)\
**Post date:** [May 2, 2011, 7:11pm UTC](https://community.wowza.com/t/tcp-window-size-with-rtmp-live-streaming/36525/1 "2011-05-02T19:11:53Z")

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Hi,

We are tracking a possible Long Fat Network issue using WMS on ubuntu. The default and max tcp window (read and write) have been increased in the kernel, but I cannot find any parameter related to TCP window size on WMS. So here is the question:

does WMS set its own TCP window side for any reason or is it using the default TCP stack parameters?

Also if WMS do something specific on that side, can it be set by any parameter in the config file?

Thanks,

Nicolas

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**Author:** ![Charlie\_Good](https://sea2.discourse-cdn.com/flex002/user_avatar/community.wowza.com/charlie_good/32/383_2.png) [@Charlie\_Good](https://community.wowza.com/u/Charlie_Good)\
**Post date:** [May 3, 2011, 4:01am UTC](https://community.wowza.com/t/tcp-window-size-with-rtmp-live-streaming/36525/2 "2011-05-03T04:01:29Z")

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The settings that we have access to that are socket related from within Jave are here:

[http://download.oracle.com/javase/1.5.0/docs/api/java/net/Socket.html](http://download.oracle.com/javase/1.5.0/docs/api/java/net/Socket.html)

You can see if VHost.xml that you can change the send and receive buffer size.

Charlie