tfe Absent Member.
Absent Member.
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tcp delayed acknowledgement in OES Linux?

Hi,

in NW 6.x there was a very useful parameter to tune up tcp performance with disabling tcp delayed ack:
set tcp delayed acknowledgement = off

is there a similar way to turn this off in OES2 Linux and is it useful?

Thanks
Tobi
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Marcel_Cox Absent Member.
Absent Member.

Re: tcp delayed acknowledgement in OES Linux?

TFe,

> in NW 6.x there was a very useful parameter to tune up tcp performance
> with disabling tcp delayed ack:
> set tcp delayed acknowledgement = off


That was actually quite a bad recommendation. The issue was that there
were 3 parameters that played closely together, delayed ack, monshall and
nagle. The optimal configuration was to have these 3 enabled at the same
time. However since the minshall option was hidden and disabled by
default, and even many Novell people didn't know about it, there has
always been the bad recommendation about disabling delayed ack (instead of
enableing minshall) that was floating around.
On Linux, the linux developers have put a lot of effort into making their
TCP/IP protocol stack very standard conformant and well tuned by default.
While it is possible to tune the TCP/IP protocol parameters, it is not
something a normal administrator should have to worry about and would
require a good underding of the underlying working anyway.

Now if you have a specific performance problem on *you* server, you should
describe it in detail and also provide exact server and client OS version
and patch information.

--
Marcel Cox


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Knowledge Partner
Knowledge Partner

Re: tcp delayed acknowledgement in OES Linux?

There is one exception to what Marcel mentioned.

If you have setup TCP/IP linking on the Linux agents, you can get poor transfer rates.

TID #7000765

Explains what tweaking you have to do to resolve this.
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Marcel_Cox Absent Member.
Absent Member.

Re: tcp delayed acknowledgement in OES Linux?

kjhurni wrote:

>
>TID #7000765
>
>Explains what tweaking you have to do to resolve this.


Well, there may always be product specific tweakings, but one should not
generalise a Groupwise specifc tuning to apply to a general OES server.

--
Marcel Cox
http://support.novell.com/forums
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