Using trace in the application test facility is useful for debugging an application, but can also cause DB2 contention with others testing against the same application database. Sometimes contention on the application database is confused with contention on the encyclopedia. Testing code with trace on can lock up portions of the application database, which causes other jobs to fail that need access to that portion of the database. Users of trace should access and release trace as quickly as possible. If a user has a need to stay in trace for long periods of time, they should warn others that may need to access the database involved.
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