Problem
If the Workbench server is constrained for resources, there is a possibility that Workbench will show errors in workbench log file mci.log soon after startup.
Solution
The JAVA_OPTS environment variable can be set to modify the resource usage of Java. More specifically, you can halve the Java Stack Size from 2MB to 1MB.
e.g. $JAVA_OPTS=-Xss1024K