The default sized Oracle 10g SYSAUX tablespace runs very quickly ouf of space.
From oracle doc: A typical system with an average of 10 concurrent active sessions may require approximately 200 to 300 MB of space for its AWR data. The following table provides guidelines on sizing the SYSAUX tablespace based on the system configuration and expected load. Parameter/Recommendation Small Medium Large Number of CPUs 2 8 32 Number of concurrently active sessions 10 20 100 Number of user objects: tables and indexes 500 5,000 50,000 Estimated SYSAUX size at steady state with default configuration 500 MB 2 GB 5 GB
Fixed in commit e5417ba5c9c862b7fbd466cfb82c28835cd353b4 491320 - extended default size of SYSAUX
Spacewalk 0.6 released