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List: wireshark-users
Subject: Re: [Wireshark-users] Fw: Re: How to find the bottleneck?
From: Pedro Tumusok <pedro.tumusok () gmail ! com>
Date: 2017-08-29 9:06:57
Message-ID: CACQiMXagrPFNraOZOL2n7T1tNaG9mr47Vi=AwCAW+kua_RoOAQ () mail ! gmail ! com
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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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>> unsubscribe
>
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>
--
Best regards / Mvh
Jan Pedro Tumusok
[Attachment #5 (text/html)]
<div dir="ltr">Hi,<div><br></div><div>I will plug Jaspers blog post, before he gets \
to do it himself.</div><div><br></div><div><a \
href="https://blog.packet-foo.com/2014/09/how-millisecond-delays-may-kill-database-per \
formance/">https://blog.packet-foo.com/2014/09/how-millisecond-delays-may-kill-database-performance/</a><br></div><div><br></div><div>Pedro</div></div><div \
class="gmail_extra"><br><div class="gmail_quote">On Tue, Aug 29, 2017 at 10:45 AM, \
Dennis Schneck <span dir="ltr"><<a href="mailto:dennisschneck@web.de" \
target="_blank">dennisschneck@web.de</a>></span> wrote:<br><blockquote \
class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc \
solid;padding-left:1ex"><div><div style="font-family:Verdana;font-size:12.0px"><div> \
</div>
<div>Hello Anne, Hello Hugo,</div>
<div>I tryed to get some statistics ( smb2, RTT, data usage ).</div>
<div>
<div>
<div>
<div style="margin:10.0px 5.0px 5.0px 10.0px;padding:10.0px 0 10.0px \
10.0px;border-left:2.0px solid rgb(195,217,229)"> <div style="margin:0 0 10.0px \
0"><span class=""><b>Gesendet:</b> Montag, 28. August 2017 um 17:35 Uhr<br> \
<b>Von:</b> "Anne Blankert" <<a href="mailto:anne.blankert@geodan.nl" \
target="_blank">anne.blankert@geodan.nl</a>><br> </span><span class=""><b>An:</b> \
"Community support list for Wireshark" <<a \
href="mailto:wireshark-users@wireshark.org" \
target="_blank">wireshark-users@wireshark.org</a><wbr>><br> <b>Betreff:</b> Re: \
[Wireshark-users] How to find the bottleneck?</span></div>
<div><div><div class="h5">
<div>* Are you sure the branch has a 1 GB/s connection to HQ? 1GB/s possible, but \
quite good for current standards. <div>* 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 <div>* 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</div>
<div> </div>
<div> </div>
</div>
</div>
<div class="gmail_extra">
<div class="gmail_quote">2017-08-28 14:37 GMT+02:00 Dennis Schneck <span><<a \
href="mailto:dennisschneck@web.de" \
target="_blank">dennisschneck@web.de</a>></span>:
<blockquote class="gmail_quote" style="margin:0 0 0 0.8ex;border-left:1.0px \
rgb(204,204,204) solid;padding-left:1.0ex"> <div>
<div style="font-family:Verdana;font-size:12.0px">
<div>
<div><br>
Hello,<br>
the following scenario</div>
<div><br>
headquarter: Server (AIX) and client (Windows)</div>
<div>branch: client (Windows)</div>
<div> </div>
<div><br>
If the Clients from the branch open a project from the server in the headquarter<br>
it takes about 5 times longer than the same project open in headquarters.<br>
The bandwith from the branch is 1 GB/s for the hole company.<br>
So OK it takes longer in the branch but 5 times.</div>
<div>The Data is on the Storage System.</div>
<div><br>
How to find the bottleneck in the network ?<br>
The networkadmin is sure all is fine.</div>
<div> </div>
<div>made a IO Graph from "tcp.seq" from one of some sample Data I got from \
the Users</div>
<div> </div>
<div>SPW = BAD = branch</div>
<div>SPG = GOOD = headquarter</div>
<div><br>
Thanks<br>
<span class="m_1092075993955253367HOEnZb"><font \
color="#888888">Dennis</font></span></div>
<div> </div>
<div> </div>
</div>
<div class="m_1092075993955253367m_8806567745601263433signature"> </div>
</div>
</div>
<br>
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clear="all"><div><br></div>-- <br><div class="gmail_signature" \
data-smartmail="gmail_signature">Best regards / Mvh<br>Jan Pedro \
Tumusok<br><br></div> </div>
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