Do you need anything that is or was running? Clearing the runtime database tables would be the simplest quickest, and depending on the scope of the problem, possibly only, method to get rid of those processes.
There isn't going to be a blanket 'clear all process 'ZYX' instance runs - the instances exist independently of each other.
The GUI not loading is likely a resource issue. If you increase memory for PAM it may allow it to load enough that you can begin to abort the processes through the GUI:
In PAM/Server/c2o/bin/
c2osvcw.conf:
wrapper.java.initmemory=4096
wrapper.java.maxmemory=4096
If PAM is already set and using 4g:
in c2osvcw.conf:
commented out
#wrapper.java.initmemory=4096
#wrapper.java.maxmemory=4096
then add at the bottom of the file:
wrapper.java.additional.14-XX:initmemory=8192
wrapper.java.additional.15-XX:maxmemory=8192
(Where 14 and 15 are the next available values)
A couple other settings need to be tuned to better handle this increase in memory. Modify as follows:
wrapper.java.additional.7=-XX:PermSize=256m
wrapper.java.additional.8=-XX:MaxPermSize=768m
Good Luck, and feel free to contact the support team for assistance.
Please note - your system must have at least 8 GB of FREE contiguous memory meaning 12 or 16gb TOTAL dedicated memory installed on the server.