Re: Fw: Re: How to find the bottleneck?

[Pedro Tumusok <pedro.tumusok () gmail com>]

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 () web de>
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 () geodan nl>
> *An:* "Community support list for Wireshark" <
> wireshark-users () wireshark org>
> *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 () web de>:
> > 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

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