Wireshark · Wireshark-users: Re: [Wireshark-users] Fw: Re: How to find the bottleneck?

[Pedro Tumusok <pedro.tumusok@xxxxxxxxx>]

Hi,

I will plug Jaspers blog post, before he gets to do it himself.

https://blog.packet-foo.com/2014/09/how-millisecond-delays-may-kill-database-performance/

Pedro

On Tue, Aug 29, 2017 at 10:45 AM, Dennis Schneck <dennisschneck@xxxxxx> wrote:

 

Hello Anne, Hello Hugo,

I tryed to get some statistics ( smb2, RTT, data usage ).

 

 

Gesendet: Montag, 28. August 2017 um 17:35 Uhr
Von: "Anne Blankert" <anne.blankert@xxxxxxxxx>
An: "Community support list for Wireshark" <wireshark-users@xxxxxxxxxxxxx>
Betreff: Re: [Wireshark-users] How to find the bottleneck?

* Are you sure the branch has a 1 GB/s connection to HQ? 1GB/s possible, but quite good for current standards.

* The network is as slow as the slowest link. Are you sure that the slowest link between the branch client and HQ server is 1GB/sec? If traffic is routed over public internet between branch and HQ, there are likely some bottlenecks beyond your control

* Is there network latency between branch and headquarters? Even on high bandwidth connections, network latency can cause low data transfer rates because some protocols are very chatty: the next packet is sent only after receiving acknowledgment for the previous packet. With high latency networks, this may result in sometimes very poor transfer speeds

 

 

 

2017-08-28 14:37 GMT+02:00 Dennis Schneck <dennisschneck@xxxxxx>:

Hello,
the following scenario

headquarter:  Server (AIX) and client (Windows)

branch: client (Windows)

 

If the Clients from the branch open a project from the server in the headquarter
it takes about 5 times longer than the same project open in headquarters.
The bandwith from the branch is 1 GB/s for the hole company.
So OK it takes longer in the branch but 5 times.

The Data is on the Storage System.

How to find the bottleneck in the network ?
The networkadmin is sure all is fine.

 

made a IO Graph from "tcp.seq" from one of some sample Data I got from the Users

 

SPW = BAD = branch

SPG = GOOD = headquarter

Thanks
Dennis

 

 

 

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Best regards / Mvh
Jan Pedro Tumusok