[mythtv-users] Slow network causes myth to hang?

Brian Wood beww at beww.org
Sun Feb 11 03:24:02 UTC 2007


On Feb 10, 2007, at 8:17 PM, John Drescher wrote:

>> I suspect it's not that the database uses all that bandwidth, it's  
>> that
>> with NFS saturating the network mysql can't get a packet in edgewise.
>>
> It is NFS saturating the network.
>
>>
>> Another possibility is high processor usage.  Some cheap ethernet  
>> cards
>> demand a fair bit of it.  I have a 2.0 GHz Celeron system with a  
>> Realtek
>> 8139 card in it, on a full-duplex 100baseT network, and using most of
>> the available bandwidth will cause 20% of the CPU to be consumed in
>> "system" processes. If I'm using a web browser or SMB file browser  
>> to do
>> the copy, the software and ethernet driver together can easily  
>> consume
>> over half the CPU.
>> _______________________________________________
>
> Not on either of my systems. Both have server class motherboards with
> server NICs and the cpu usage is low on both systems.
>

I'm sure you know all this, but:

Any chance of changing your network topology so the path from the  
Myth machine to NFS storage is not interfering with the "transfers"  
you mentioned?

You could even put a second NIC in the NFS box and create a second  
network just for the Myth system I suppose, if one of the boxes  
involved in the transfers was the NFS server.

There are 2 ways to get more bandwidth, add more in some way or  
remove some of what exists from the overloaded path.

Just a thought.


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