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IDS Forum

Re: concurrent connections problem

Posted By: jak aka
Date: Monday, 10 November 2008, at 8:39 p.m.

In Response To: Re: concurrent connections problem (Art Kagel)

Thank you very much Art

We have 16 CPU and use for VPs only 12 cpu.

Jakkrit A.

________________________________
From: Art Kagel <art.kagel@gmail.com>
To: ids@iiug.org
Sent: Monday, November 10, 2008 9:33:46 PM
Subject: Re: concurrent connections problem [13953]

Twelve poll threads seems excessive - how many CPU cores are on this
machine? Also 350 connections permitted per poll thread is too many. IBM
recommends that you not allow more than 200 connections per poll thread -
that may be your problem. So, estimate the maximum number of connections
you expect to see and divide that by 200 to get the number of required poll
threads.

Also, why have four ports on the same network address for a single server?

Lets allow for 2000 connections, so I would recommend:

NETTYPE tlitcp,10,200,NET -- Always use NET VP poll threads for network
connections, never CPU VPs.

Art

On Mon, Nov 10, 2008 at 8:30 AM, jak aka <jakkritakeng@yahoo.com> wrote:

> NETTYPE tlitcp,12,350,NET
>
> (we try both NET and CPU)
>
> ________________________________
> From: jak aka <jakkritakeng@yahoo.com>
> To: ids@iiug.org
> Sent: Monday, November 10, 2008 8:23:39 PM
> Subject: Re: concurrent connections problem [13947]
>
> port_a ontlitcp SERVER XXX1 r=0, s=2
> port_b ontlitcp SERVER XXX2 r=0, s=2
> port_c ontlitcp SERVER XXX3 r=0, s=2
> port_d ontlitcp SERVER XXX4 r=0, s=2
>
> Best regards,
> Jakkrit A.
>
> ________________________________
> From: Art Kagel <art.kagel@gmail.com>
> To: ids@iiug.org
> Sent: Monday, November 10, 2008 7:04:44 PM
> Subject: Re: concurrent connections problem [13947]
>
> What are your NETTYPE settings?
>
> Art
>
> On Mon, Nov 10, 2008 at 6:47 AM, jak aka <jakkritakeng@yahoo.com> wrote:
>
> > Hi all,
> >
> > We're facing a problem when concurrent connections reach 1000 or 1024
> > connections (monitor by "netstat -a" command ) then the application
> cannot
> > connect more. ("cannot connect" means exceed timeout , 5 sec)
> >
> > We have
> > 1 Database server : Sun Solaris 10 , IDS 10.00 FC8 , ESQL/C 2.9
> > 2 Application server : ESQL/C 2.9
> >
> > We split database port to 4 port ; port_a, port_b ,port_c ,port_d
> >
> > Under 1000, every connection look good. It takes not over 1sec. After
> > reaching
> > 1000 connections , the database still connectable for local connection
> (any
> > port) , but remote connection cannot perform (all port). It 's not error
> > but
> > It takes more than a minute to connect.
> >
> > I see in the Admin Guide about a parameter "MAX_INCOMPLETE_ CONNECTIONS"
> > and
> > "LISTEN_TIMEOUT" , Can you tell me what's this parameter use for and how
> to
> > use ?
> >
> > Best Regards,
> > Jakkrit A.
> > IDS guy.
> >
> >
> >
> >
>
>
>
*******************************************************************************
> > Forum Note: Use "Reply" to post a response in the discussion forum.
> >
> >
>
> --
> Art S. Kagel
> Oninit (www.oninit.com)
> IIUG Board of Directors (art@iiug.org)
>
> Disclaimer: Please keep in mind that my own opinions are my own opinions
> and
> do not reflect on my employer, Oninit, the IIUG, nor any other organization
> with which I am associated either explicitly or implicitly. Neither do
> those opinions reflect those of other individuals affiliated with any
> entity
> with which I am affiliated nor those of the entities themselves.
>
>
>
>
*******************************************************************************
> Forum Note: Use "Reply" to post a response in the discussion forum.
>
>
>
>
*******************************************************************************
> Forum Note: Use "Reply" to post a response in the discussion forum.
>
>

--
Art S. Kagel
Oninit (www.oninit.com)
IIUG Board of Directors (art@iiug.org)

Disclaimer: Please keep in mind that my own opinions are my own opinions and
do not reflect on my employer, Oninit, the IIUG, nor any other organization
with which I am associated either explicitly or implicitly. Neither do
those opinions reflect those of other individuals affiliated with any entity
with which I am affiliated nor those of the entities themselves.

*******************************************************************************
Forum Note: Use "Reply" to post a response in the discussion forum.

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