Memory system and control method

Abstract

According to one embodiment, a memory system includes a nonvolatile memory and a controller. The nonvolatile memory includes blocks. The controller controls the nonvolatile memory. The controller acquires a write amount to the nonvolatile memory in a first period. The controller calculates an estimated amount of writing to the nonvolatile memory in the first period. The controller changes, when the write amount is larger than the estimated amount by a first threshold value or more, one or more parameters used for writing of data to the nonvolatile memory.

What is claimed is: 
     
         1 . A memory system comprising:
 a nonvolatile memory including blocks; and   a controller circuit configured to:   acquire a first write amount of first data that is actually written into the nonvolatile memory in a first period;   calculate a second write amount of second data that is estimated to be written into the nonvolatile memory in the first period with respect to the first data; and   change, when the first write amount is larger than the second write amount by a first threshold value or more, one or more parameters used for writing of data to the nonvolatile memory.