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IDS Forum

Re:Error 25588 : IDS 7.31UD1 on Solaris8

Posted By: Manoj Mohan
Date: Wednesday, 5 September 2007, at 5:36 p.m.

In Response To: Re:Error 25588 : IDS 7.31UD1 on Solaris8 (ART KAGEL, BLOOMBERG/ 731 LEXIN)

Thanks.. I will look at the FAQ.. Good to know such facts...






<kagel@bloomberg. =

net> =

Sent by: =

ids-bounces@iiug. Subj=

org Re:Error 25588 : IDS 7.31UD1 on =

Solaris8 [9911] =


09/05/2007 02:53 =

PM =



Please respond to = =



I disagree with this statement Manoj:

> For best performance, specify NET if you require more than one poll
> thread. If you are running Windows, specify NET in all cases.

That used to be the advice and I've always disagreed with it. A couple =
years ago I finally got the IDS folk to look at my recommendations vers=
theirs and to test them out. The results were that the docs were change=
match fairly closely to my own recommendations. Those being:

Shared memory connections ONLY in CPU VPs and the number of poll thread=
be equal to the number of CPU VPs for best responsiveness if you will b=
actively using the shared memory connections for more than occassional
maintenance connections. TCP connections ONLY in NET VPs and there shou=
be a few of those configured sufficient to limit the number of connecti=
managed by a single poll thread to fewer than 200 which IBM considers t=
o be

efficient. For a full explanation of why I make these recommendations, =
entry on NETTYPE in the IDS FAQ.

Art S. Kagel

----- Original Message -----
From: Manoj Mohan <>
At: 9/05 14:19:22

This extract from the manual might make things bit more clear for you..=

Basically that number is no. of connections per poll thread....

NETTYPE connection_type,poll_threads,c_per_t,vp_class

identifies the protocol-interface combination to which the poll

threads are assigned. You typically set this field to match the

connection_type field of a dbservername entry that is in the sqlh=3D

file or registry.

is the number of poll threads assigned to the connection type. Se=3D

this value to no more than NUMCPUVPS for any connection type.

is the number of connections per poll thread. Use the following f=3D

ula to calculate this number:

c_per_t =3D3D connections / poll_threads


is the maximum number of connections that you expect the

indicated connection type to support. For shared-memory

connections (ipcshm), double the number of connections for =3D


is the class of virtual processor that can run the poll threads.

Specify CPU if you have a single poll thread that runs on a CPU V=3D

For best performance, specify NET if you require more than one po=3D

thread. If you are running Windows, specify NET in all cases. The=3D

default value for this field depends on the following conditions:=3D

If the connection type is associated with the dbservername =3D

is listed in the DBSERVERNAME parameter, and no previous

NETTYPE parameter specifies CPU explicitly, the default VP

class is CPU. If the CPU class is already taken, the defaul=3D
t is


If the connection type is associated with a dbservername th=3D

the DBSERVERALIASES parameter specifies, the default VP cla=3D

is NET.



<kvangompel@caami =3D> =3D

Sent by: =3D

ids-bounces@iiug. =3D

org =3D


Re:Error 25588 : IDS 7.31UD1 on =3D

09/05/2007 01:10 Solaris8 [9906] =3D

PM =3D



Please respond to =3D =3D



Thank you Art for your quick response.

First of all sorry for dropping the threat in the second message I post=

I thought the number specified in the parameter NETTYPE was the maximum=
concurrent connections of that type. We are having the problem after 50=

sequential connections!
Do I misunderstand the functioning of NETTYPE?
I read somewhere that it is not necessary to specify the number of
users for a shared memory connection in the config-file, is that true?



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