RE: Dead Connect detect
- From: kathy duret <katpopins21@xxxxxxxxx>
- To: Richard.Goulet@xxxxxxxxxxx, oracle-l@xxxxxxxxxxxxx
- Date: Mon, 4 Apr 2011 19:54:16 -0700 (PDT)
I have to write a script to kill those hanging around. Anything older than 1
day and with a program name of 'XZY' I kill -9 them. I run this twice a day
for business object reports.
I also used to have to run this at a different place for some VB programs they
had.
Kathy
--- On Mon, 4/4/11, Goulet, Richard <Richard.Goulet@xxxxxxxxxxx> wrote:
From: Goulet, Richard <Richard.Goulet@xxxxxxxxxxx>
Subject: RE: Dead Connect detect
To: "Jorgensen, Finn" <Finn.Jorgensen@xxxxxxxxxxxxxxxxx>, oracle-l@xxxxxxxxxxxxx
Date: Monday, April 4, 2011, 10:20 AM
Dead Connect detect
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OK, I've two questions:
1) I'm using Redhat Linux
2) I don't want the firewall settings to be
exceeded so sending a packet just to keep the connection open is not
desired. What is is to find those that are dead & clean up on the
Oracle side.
Dick
Goulet
Senior Oracle DBA/NA Team Leader
From: Jorgensen, Finn
[mailto:Finn.Jorgensen@xxxxxxxxxxxxxxxxx]
Sent: Monday, April 04,
2011 10:07 AM
To: Goulet, Richard;
'oracle-l@xxxxxxxxxxxxx'
Subject: RE: Dead Connect
detect
Dick,
Gwen
Shapira did a presentation at Hotsos 2011 that involved this type of scenario.
2
of the proposed solutions were as follows (copy and paste from her
presentation)
:
Another solution
will be to modify kernel parameter
net.ipv4.tcp_keepalive_time
to a value lower
than the firewall timeout values. This should give the TCP
keepalive a chance
to keep the connection alive.
A third solution
can be to use SQLNET keep-alive parameter
SQLNET.EXPIRE_TIME
that allows Oracle to send its own keep-alive probes
from the server to
the client, normally sent every 10 minutes. These probes
will
also keep the
connection a live and not allow the firewall to disconnect it.
Thanks,
Finn
From:
oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On
Behalf Of Goulet, Richard
Sent: Monday, April 04, 2011 9:52
AM
To: oracle-l@xxxxxxxxxxxxx
Subject: Dead Connect
detect
All,
Many years ago
(version 9.2) I toyed with this capability of SQL*Net without much luck.
Has anyone toyed with it in recent times (11.1.0.7) with much success???
I'm facing an issue where we have web servers in a DMZ that connect back to the
database and the firewall has a 24 hour idle timeout, so I end up having to
manually disconnect some sessions every day.
Dick
Goulet
Senior
Oracle DBA/NA Team Leader
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