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By default this thread is dynamically scheduled to awake according to the timeout values for any transactions created, ensuring the most timely termination of transactions. It may alternatively be configured to awake at a fixed interval, which can reduce overhead at the cost of less accurate rollback timing. For periodic operation, change the CoordinatorEnvironmentBean.txReaperMode property from its default value of DYNAMIC to PERIODIC and set the interval between runs, in milliseconds, using the property CoordinatorEnvironmentBean.txReaperTimeout. The default interval in PERIODIC mode is 120000 milliseconds.