From: Alexei_Roudnev (Alexei_Roudnev_at_exigengroup.com)
Date: Wed Apr 13 2005 - 21:44:53 CEST
Message-ID: <024101c54061$4357cc80$2c7f300a@sjc.exigengroup.com> From: "Alexei_Roudnev" <Alexei_Roudnev@exigengroup.com> Date: Wed, 13 Apr 2005 12:44:53 -0700 Subject: Re: [suse-oracle] Very slow X11 GUI in Oracle when woprking remotely
Magni, trust me (I worked as NOC head for 6 years, and I have ALL ,
absolutely ALL, network monitoring elements) - IT IS NOT NETWORK PROBLEM.
Network do not experience packet loss, it is just approx 1Mbit bandwidth
with some delay (100 - 200 msec max). Eliminate _dupleex problems_,
_excessive packet loss_, _duplicate packets_, _random packet order_, _MTU
problems_, _DOS attack -:)_.
It happen if:
- I run X11 thru remote network (usually thru slogin -X, but if I use
X -query server, or just set up DISPLAY, it behave by the same way)
- Network conenctioin have latency (not 100Mbit network)
Then, when you click a button, GUI do not react for - approx 1 second - 2
minutes (never predictable), then it reacts.
Looks as they send updates in 1 byte TCP packets (I can trace TCP< not a
problem) or just they miss some timer.
It rely to Oracle GUI only - I can run any other X11 applications which do
work well enough (they can make slower refreshes or
experience some short delay, say 1/2 second, but not 2 minutes delays).
----- Original Message -----
From: "Magni Fabrizio" <Fabrizio.Magni@rasnet.it>
To: "Alexei_Roudnev" <Alexei_Roudnev@exigengroup.com>; "Arun Singh"
<Arun.Singh@novell.com>
Cc: <suse-oracle@suse.com>
Sent: Wednesday, April 13, 2005 11:25 AM
Subject: RE: [suse-oracle] Very slow X11 GUI in Oracle when woprking
remotely
Well, I don't know ehere "here" is but a delay of 150ms is not so bad.
By the way: how did you calculate it? Ping is not the best tool for such
measuring.
However to help you we should need more information.
How are you ethernet card set? Autonegotiation? 100 full? 100 half?
And what about the output of ifconfig?
Do you see collisions or errors reported?
Just a test: what happens if you transfer a big enough file (ex. 100MB)?
What's the transfer ratio?
Fabrizio
> -----Original Message-----
> From: Alexei_Roudnev [mailto:Alexei_Roudnev@exigengroup.com]
> Sent: Wednesday, April 13, 2005 8:06 PM
> To: Magni Fabrizio; Arun Singh
> Cc: suse-oracle@suse.com
> Subject: Re: [suse-oracle] Very slow X11 GUI in Oracle when
> woprking remotely
>
>
> Not; it is not Ethernet problem (I have FULL monitoring on
> network, so it
> is not an issue!). IT just happen, when I run X11 thru
> network with delays
> (150 msec from here to Canada, for example).
>
>
> ----- Original Message -----
> From: "Magni Fabrizio" <Fabrizio.Magni@rasnet.it>
> To: "Alexei_Roudnev" <Alexei_Roudnev@exigengroup.com>; "Arun Singh"
> <Arun.Singh@novell.com>
> Cc: <suse-oracle@suse.com>
> Sent: Wednesday, April 13, 2005 12:31 AM
> Subject: RE: [suse-oracle] Very slow X11 GUI in Oracle when woprking
> remotely
>
>
> Hi Alexei,
> what's the result of:
>
> # ethtool eth0 (or the name of the interface you are using).
>
> In our server farmer we have to force our NIC to 100 full-duplex with
> autoneg off because our networking team doesn't like any
> other settings
> and the autonegotiation is not allowed on the network.
>
> When I'm not in 100 full I almost can't use any remote GUI since
> performance are baaaaaaaaaaad.
>
> Are you using bonding?
>
> Fabrizio
>
> > -----Original Message-----
> > From: Alexei_Roudnev [mailto:Alexei_Roudnev@exigengroup.com]
> > Sent: Wednesday, April 13, 2005 4:07 AM
> > To: Arun Singh
> > Cc: suse-oracle@suse.com
> > Subject: [suse-oracle] Very slow X11 GUI in Oracle when
> > woprking remotely
> >
> >
> > Does anyone have an idea, what's wrong with Oracle / Motif /
> > GUI so that all
> > their gui applications (netca, dbca, etc...)
> > works fine when started thru fast 100Mbit network or from
> > local console, but
> > slow down dramatically (lost events and then wait 1 - 2
> > minutes for every
> > mouse click or every key type)? It is not overall network
> > problem - I cna
> > run other X11 applications without
> > serious degradation (yes, they became slower but I can use
> > kwrite, xterm,
> > even can run web browser thru this network)?
> >
> > Connection is thru slogin -X.
> >
> >
> >
> > --
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> >
>
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