[OpenSER-Users] UDP Buffer Size / OpenSER / Linux

[Bogdan-Andrei Iancu]

Hi Klaus, Hi Carsten,

Setting a large buffer for the UDP socket will not solve the problem of 
slow openser processing, but will solve the problem of temporary 
overloads due a short traffic peek or due short openser blocking in an 
synchronous op (like DNS or DB).  In such corner cases, the buffering in 
the kernel socket will avoid message dropping.

Regards,
Bogdan

Klaus Darilion wrote:
> Carsten Bock schrieb:
>   
>> Hi,
>>
>> short question:
>> Can anybody give me a hint regarding the Linux UDP-Buffer size? Are
>> there any known good values for this or is the default value (128k) of
>> Linux sufficient? I've read, regarding other SIP-Systems (namely IBM SIP
>> Servlets and Communigate pro), the recommendation to increase the
>> UDP-Buffer-size to 3 or even 4 MByte....
>> Are there any recommended / known best values for heavy load OpenSER
>> Installations?
>>     
>
> IMO these values are too high. If the server is for any reason to slow 
> to handle the load and the buffer fills up, then it might happen that 
> the transactions are already timeout in the UAC when the SIP proxy 
> starts processing the requests. If the proxy is overloaded IMO the 
> requests should be dropped instead of queuing them for too long time.
>
> regards
> klaus
>
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