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Re: Réf. : Linux and DB2

Subject: Re: Réf. : Linux and DB2
Date: Tue, 05 Apr 2005 08:15:21 +0200
Sorry, up to know I haven't known ulimit -a

here are all values:

core file size        (blocks, -c) 0
data seg size         (kbytes, -d) unlimited
file size             (blocks, -f) unlimited
max locked memory     (kbytes, -l) unlimited
max memory size       (kbytes, -m) unlimited
open files                    (-n) 4096
pipe size          (512 bytes, -p) 8
stack size            (kbytes, -s) unlimited
cpu time             (seconds, -t) unlimited
max user processes            (-u) 7168
virtual memory        (kbytes, -v) unlimited



I red about a maximum connections problem at mysql ( http://dev.mysql.com/doc/mysql/en/linux-post-install.html ) .

Any Ideas, if there could bei similarities between the mysql problem and the DB2 Connect problem??
Thanks!



Sebastien Berube schrieb:




Have you checked the ulimits for the user that's actually running the application that connects? You might just be running this application as root and running out of file descriptors...

--
Sébastien Bérubé
(514) 964-1828
berube@ca.ibm.com

"With sufficient thrust, pigs fly just fine."


Markus <updates4004@vr-w Pour : focus-linux@securityfocus.com eb.de> cc : Objet : Linux and DB2 04/04/2005 02:56 PM




Hello all!

Does anybody use DB2Connect on United Linux 1.0 We have the following
Problem:

The DB2Connect Software enables access from DB2 Clients (e.g. for
connecting Application Servers to Databases) to
to DB2 Databases on Z/oS Systems. You can say that DB2Connect works as a
gateway.

At the moment we can't open more then 1100 parallel connections per
DB2Connect installation. But doing the same on AIX 4000 - 5000
connections are possible at the same time.
At the moment, suing United Linux 1.0 reach 1100 Connections then the
whole machine hangs and must be rebooted. We don't achieve the CPU and
RAM limits.

Are there e.g. any kernel parameters that limit the number of parallel
calls to a Server ?? We are using kernel 2.4.21!
First of all, we get a sempahore error, but after changing the values in
sysctl.conf, the were no further errors.

Is it possible, that Linux can't handle more then 1000 parallel
connections? I don't hope so.

Thanks for answering!





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