Re: Réf. : Linux and DB2

From: Markus (updates4004_at_vr-web.de)
Date: 04/05/05

  • Next message: Julius Detritus: "Libre Software Meeting - Security Topic - RFP" 
    Date: Tue, 05 Apr 2005 08:15:21 +0200
To: focus-linux@securityfocus.com

    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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