A computer monitors a memory system during operation. The computer detects a first number of errors in the memory system. The computer determines that the first number of errors is below an error level threshold. The computer lowers a first group of one or more memory parameters of the memory system by a first amount. After the lowering of one or more memory parameters by the first amount, the computer detects a second number of errors in the memory system. The computer determines that the second number of errors is above the error level threshold. The computer raises a second group of one or more memory parameters of the memory system by a second amount.