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*
*   PRIMARY DISCLAIMER:
*
*     It is not recommended that you install this fix unless specifically
*     instructed to do so by a qualified IBM Technical Support representative.
*
*     Please call your appropriate support location for more information.
*     For instance, in the United States, you would call 1-800-CALL-AIX.
*
*******************************************************************************
*
*
*
*   VISIT OUR PAGES ON THE INTERNET
*   _______________________________
*
*   IBM Communications Server Support
*       http://www.ibm.com/software/network/commserver/support
*
*
* +--------------------------------------------------------------------------+
*                                                                   
*  DATE: 10/10/2002
*
*  DESCRIPTION:
*  ____________
*
*  README FILE FOR
*
*   IBM Communications Server for AIX temporary fix ("efix")
*
*                                        (Installs only on PTF level 6.1.0.1)
* APAR: IY35728
*
* This package contains APAR fixes to the product above.  This
* package can be distributed to any one who has a license for
* this product.
*
*+----------------------------------------------------------------------------+
*
*
* PREREQUISITES :
* _______________
*
*   IBM Communications Server for AIX version 6.1
*
*
*      PTF:  This efix is designed for the fileset sna.rte at the specific
*      level of 6.1.0.1.  It is not designed for any other level of the product
*      and may cause irreparable damage if inappropriately applied.  If you are
*      in need of this PTF supplement to the product before proceeding with
*      the download and application of this efix please go to the above support
*      site and refer to the Code Updates section for details on retrieving the
*      minimum level of maintenance for this efix.  You may also choose instead 
*      to call support directly at 1-800-CALL AIX for more information.
*
*
*   No other prerequisites are required for the installation of this efix.
*
*+----------------------------------------------------------------------------+
*
*
* PROBLEM FIXED:  IY35728      
* Module Name: sna_mux
* APAR description: 
*
* a slow memory leak in CS/AIX which builds up over several weeks 
* until the system becomes unresponsive and eventually hangs.     
* snaadmin query_kernel_memory_limit shows the value for "actual" 
* and "max_used" as continually increasing and eventually reaching
* near the value of "limit".  As "actual" grows closer to "limit" 
* then the command snaadmin query_buffer_availability will start  
* to show decreasing values for "buf_avail".
* 
* ERROR Description:
*
* CAUSE:
* The problem occurs when an application using the back level APPC
* interface (Sybase in this case) is receiving signals (to notify
* the application of other work from clients for instance). If one 
* of these signals occurs at a certain time during the processing
* of the close at the end of each transaction then it is possible
* for CS/AIX to lose an internal message that it is sending. There
* are no other symptoms, the applicaiton's conversation completes
* correctly.
* 
*
* included in this updated module are fixes for the following APARs:
*   
* iy35728 sna_mux
*
*+----------------------------------------------------------------------------+
*
* INSTALLATION INSTRUCTIONS:
* __________________________
*
*   iy35728.tar.Z ("this efix" in the steps below) is a compressed tar archive
*   file containing the updated modules and this readme.
*
*
*   To install this efix:
*   _____________________________
*
*
**   Downloading the file:
*      
*      1) Be SURE to download this efix in BINARY format.
*
*      2) Check the output of sum against the updated module after
*         uncompressing and untarring this efix.  You should see:
*
*
*         27769   580 sna_mux
*
*      3) Make sure that you have backed up your system recently.
*
*      4) Make sure that you have copies of your configuration files saved
*         (the /etc/sna directory contents).
*
*      5) Stop SNA and proceed to the next step
*         
*         sna stop
*
*  (IMPORTANT) - Be sure that SNA is stopped.  Please issue:
*
*         ps -ef | grep sna*
* 
*        If a sna* process exists, use the kill command on the process.
*	 It is also recommended that, if possible you take down any 
*	 applications that may try to access CS/AIX.
*
*  Installing the fix on a system that you ARE able to reboot:
*
*      6) Backup your previous versions of the module(s) listed in this readme
*         by renaming them.
*
*     cp /usr/lib/sna/drivers/sna_mux /usr/lib/sna/drivers/sna_mux.original
*
*      7) Copy this efix's updated module into its/their place(s).
*
*         cp sna_mux /usr/lib/sna/drivers/sna_mux
*
*      8) Shutdown and reboot your system.
*
*         shutdown -Fr
*
*      9) Restart Communications Server for AIX version 6.1
*
*         sna start
*         snaadmin init_node (and so on)...
*
*
* +--------------------------------------------------------------------------+
*
*
* CONTACT FOR Support:
* ____________________
*
*   If you have any questions, please call the IBM AIX SUPPORT CENTER
*   for your Country.  For example in the USA call: 1-800-CALL-AIX
*
*
* IBM COPYRIGHT INFORMATION:
* __________________________
*
*   IBM Communications Server for AIX version 6.1
*
*
*   (c)Copyright International Business Machines Corporation 1998, 1999, 2002.
*   All rights reserved.  Note to U.S. Government Users - Documentation
*   related to restricted rights - Use, duplication or disclosure is
*   subject to restrictions set forth in GSA ADP Schedule Contract
*   with IBM Corp.
*
*
*
* LIMIT OF LIABILITY:
* ___________________
*
*   License to the contained APAR fixes is conditioned upon the recipient
*   holding a license to the prerequisite product.  The license terms
*   and conditions of the APAR fixes are the same as those for the
*   prerequisite product.  Please see the product license for specifics.
*
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