Specifies the number of times the test-and-set mutexes should spin without blocking. The value defaults to 1 time on uniprocessor systems and to 50 times the number of processors on multiprocessor systems.

The syntax of this parameter in the DB_CONFIG file is a single line with the string set_tas_spins, one or more whitespace characters, and the number of spins.

For more information, see DbEnv::mutex_set_tas_spins().