[asterisk-users] UDP buffer overflows?

[Steve Davies]

On 10 December 2010 17:21, Shaun Ruffell <sruffell at digium.com> wrote:
> On 12/10/2010 11:02 AM, Steve Davies wrote:
>> On 10 December 2010 16:45, Steve Davies <davies147 at gmail.com> wrote:
>>> Hi,
>>>
>>> On one of our asterisk systems that is quite busy, we are seeing the
>>> following from 'netstat -s':
>>>
>>> Udp:
>>>    17725210 packets received
>>>    36547 packets to unknown port received.
>>>    44017 packet receive errors
>>>    17101174 packets sent
>>>    RcvbufErrors: 44017                  <--- this
>>>
>> [snip]
>>>
>>>  net.core.rmem_max = 1048575
>>>  net.core.wmem_max = 1048575
>>>  net.core.rmem_default = 1048575
>>>  net.core.wmem_default = 1048575
>>>  net.core.optmem_max = 1048575
>>>  net.core.netdev_max_backlog = 10000
>>>
>>
>> Additional question - Do I need to restart Asterisk for these settings
>> to apply to SIP? I have not done so yet, and further reading suggests
>> that this is a per-process buffer and may be assigned when the
>> listener is created.
>>
>
> I had to double check myself in the kernel sources (in
> net/core/sock.c:sock_init_data), but yes you will need to recreate the
> socket for the rmem_default option to take effect.
>
> I was just about to ask if changing the sysctl changed the frequency
> that you see the error counter increment when I saw your follow on.
>
> Cheers,
> Shaun

Thanks for making the extra effort Shaun :)  I will restart Asterisk
when I get a chance, and re-check.

Regards,
Steve