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Home -> Community -> Mailing Lists -> Oracle-L -> RE: SDU, TDU, Listener and ThinClient
The default for SDU is 2048. The default for TDU is 32767. The "optimal"
setting for SDU, as far as I am able to ascertain is some numeric multiple
of the MSS, which should be, to the best of my reckoning the size of the MTU
minus the IP and ethernet overhead (54 bytes). So, assuming 1460 (your 1461
includes an encryption byte), it should be 1460, 2920, etc. We're trying
2920 right now to see if we gain anything over 1460, but are being thwarted
by some hard limit of 2048. I can't see 2048 as an Oracle limitation (I
think SDU is supposed to range upto 16k), so it's either a limit on the
hardware (SunOS or Windows) or because of some setting in Java.
Anyone?
-----Original Message-----
From: Boivin, Patrice J [mailto:BoivinP_at_mar.dfo-mpo.gc.ca]
Sent: Tuesday, February 03, 2004 11:31 AM
To: 'oracle-l_at_freelists.org'
Subject: RE: SDU, TDU, Listener and ThinClient
Now I am confused, the Oracle Net Admin Guide says SDU and TDU should be set to 1461 on Ethernet networks to ensure Oracle Net packets fit inside ethernet packets.
Doesn't it also say that TDU should equal SDU?
I think the default is 2048 for both.
Please correct me if I am wrong!
<grin>
Patrice.
-----Original Message-----
From: Goulet, Dick [mailto:DGoulet_at_vicr.com]
Sent: February 3, 2004 10:41 AM
To: oracle-l_at_freelists.org
Subject: RE: SDU, TDU, Listener and ThinClient
Bambi,
What's the OS? Some OS's have a limit that will cause SDU to reset.
I =
believe WinDoze falls into that category.
Dick Goulet
Senior Oracle DBA
Oracle Certified 8i DBA
-----Original Message-----
From: Bellow, Bambi [mailto:bbellow_at_chi.navtech.com]
Sent: Monday, February 02, 2004 6:01 PM
To: Multiple Recipients of List ORACLE-L (E-mail)
Subject: SDU, TDU, Listener and ThinClient
Friends --
I have set my SDU to 5840 and my TDU to 29200. I have bounced the =
listener.
And we're seeing the client pass the SDU in successfully, but the ACCEPT
operation is setting the SDU to 2048, which, of course, is the default. =
The
client is using java's thinclient and is setting the SDU/TDU in the =
connect
string from the client end. Maybe I'm still in weekend mode, but I =
can't
seem to get around some kind of hard limit somewhere. SDU, as I recall, =
can
go up to 32k, so why's it crapping out at 2k?
TIA,
Bambi.
FAQ is at http://www.freelists.org/help/fom-serve/cache/1.htmlput 'unsubscribe' in the subject line.
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