The attached article describes how to troubleshoot eHealth space related issues. It covers following topics
What are the symptoms that usually indicate an eHealth server is possibly running out of disk space?
OS commands that can be used to identify the disk usage on Linux and UNIX
Ehealth utilities for obtaining disk space used by each Oracle tablespace and datafile?
Tips and tricks you need to know when adding and moving Oracle data file
Guide on how to Troubleshoot common issue of redo log files filling up the archiveLogs directory
Some useful SQL queries for obtaining space usage for oracle tablespace and datafiles