every CL (changelist) gets 2 CL numbers, an original (OCL) and committed (CL) number. so CL #s are monotonically increasing, but less than 1/2 are ever actually

every CL (changelist) gets 2 CL numbers, an original (OCL) and committed (CL) number. so CL #s are monotonically increasing, but less than 1/2 are ever actually committed. when the CL is first uploaded or sent for review the OCL is assigned, the CL number is assigned on commit.