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    How to find out whether Voyager Global Data Change (GDC) is running

    • Product: Voyager
    • Product Version: 8
    • Relevant for Installation Type: Multi-Tenant Direct, Dedicated-Direct, Local, TotalCare



    How can I tell if Global Data Change (GDC) is running?


    As the root or voyager user run this command:

    ps -efw |egrep -i "gdc|jobd"

    ( Note: -w option prevents ps -ef from truncating output to the width of the terminal window, which may prevent grep from correctly spotting the server processes.) 

    If you just see something like this:

    root     19995 19906  0 10:06 pts/0    00:00:00 egrep -i gdc|jobd

    GDC is not running.

    GDC may be running for one database instance (e.g., traindb) but not for the production instance.  In that situation you will see something like this:

    [VGER] voyager@aio0002 : voyager/ $ ps -efw |egrep -i "gdc|jobd"
    voyager   2812     1  0 01:03 ?        00:00:51 java -Dlog4j.configuration=file:///m1/voyager/traindb/ini/ -Xms32m -Xmx64m -XX:+UseConcMarkSweepGC -Dfile.encoding=UTF-8 -classpath .:/m1
    voyager   2830     1  0 01:03 ?        00:00:55 java -Dlog4j.configuration=file:///m1/voyager/traindb/ini/ -Xms32m -Xmx64m -XX:+UseConcMarkSweepGC -Dfile.encoding=UTF-8 -classpath .::/
    voyager  24376 24333  0 14:10 pts/0    00:00:00 grep -E --color=auto -i gdc|jobd


    This following is an example of what you might see if GDC is running for both the traindb instance and the xxxdb (aka: production) instance:

    [VGER] voyager@aio0009 : voyager/ $ ps -efw |egrep -i "gdc|jobd"
    voyager   3663     1  0 01:02 ?        00:00:35 java -Dlog4j.configuration=file:///m1/voyager/xxxdb/ini/ -Xms32m -Xmx64m -Dfile.encoding=UTF-8 -classpath .:/m1/voyager/l
    voyager   3734     1  0 01:02 ?        00:00:37 java -Dlog4j.configuration=file:///m1/voyager/xxxdb/ini/ -Xms32m -Xmx64m -Dfile.encoding=UTF-8 -classpath .::/m1/voyager
    voyager   3787     1  0 01:02 ?        00:00:36 java -Dlog4j.configuration=file:///m1/voyager/traindb/ini/ -Xms32m -Xmx64m -Dfile.encoding=UTF-8 -classpath .:/m1/voyager/li
    voyager   3842     1  0 01:02 ?        00:00:36 java -Dlog4j.configuration=file:///m1/voyager/traindb/ini/ -Xms32m -Xmx64m -Dfile.encoding=UTF-8 -classpath .::/m1/voyager/
    voyager  24750 24699  0 12:58 pts/0    00:00:00 grep -E --color=auto -i gdc|jobd
    [VGER] voyager@aio0009 : voyager/ $ 


    GDC can appear to be running but still be unresponsive. In that situation, as well as when it is not running, use the following instructions to restart GDC.

    Additional Information

    To restart GDC:

    Connect to the Voyager server and login as the voyager user

    Run ps -efw |egrep -i "gdc|jobd" to check for running gdcsvr and jobd processes for the appropriate instance. Make note of the PID of any running processes.

    Run "kill <PID>" for each running gdcsvr or jobd process if necessary

    cd m1/voyager/xxxdb/sbin



    The last two commands that are shown above restart jobd and gdcsvr by running "/m1/voyager/xxxdb/sbin/Pjobd" and "/m1/voyager/xxxdb/sbin/Pgdcsvr"

    After running those last two commands, recheck to see if GDC is once again running properly.

    See also: 

    • Article last edited: 28-Jun-2019
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