병렬 쿼리 dop

Parallel 병렬처리 Default DOP (Default Degree of Parallelism)

1. Default DOP
   1. single instance, DOP = PARALLEL_THREADS_PER_CPU x CPU_COUNT
   2. RAC , DOP = PARALLEL_THREADS_PER_CPU x sum(CPU_COUNT)

• PARALLEL_THREADS_PER_CPU 와 CPU_COUNT 는 DB 파라메타 값