Memory system and garbage collection control method
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United States of America Patent
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Dec 26, 2023
Grant Date -
Apr 6, 2023
app pub date -
Dec 9, 2022
filing date -
Oct 17, 2019
priority date (Note) -
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status (Latency Note)
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Abstract
According to one embodiment, a memory system includes a controller which controls garbage collection for preparing one or more free blocks by writing valid data read from N blocks to one or more blocks of less than the N. The controller calculates a performance ratio between writing of data in response to a request from a host device and writing of data for the garbage collection in accordance with a data writable capacity remaining in a nonvolatile memory, calculates an average performance ratio from calculated performance ratios of M generations including a calculated latest performance ratio, and adjusts a performance cycle of the garbage collection by applying one of the calculated latest performance ratio and the calculated average performance ratio.
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