System and method for adaptive optimization for performance in solid state drives based on segment access frequency

A computerized method of random access memory (RAM) cache optimization for a solid state drive (SSD) including NAND memory comprising:

• executing instructions, via an SSD controller, of an SSD adaptive profiling engine for RAM cache optimization;
• caching, in a portion of RAM, a partial flash translation layer (FTL) table including look-up addresses corresponding to logical block address (LBA) segments in the NAND memory having a threshold level of SSD input/output (I/O) accesses;
• receiving, at the SSD controller, an SSD I/O access and detecting an FTL table cache miss;
• in response to the SSD I/O access FTL table cache miss, executing the adaptive profiling engine to detect whether any outlier LBA segments with cached FTL table look-up addresses have SSD I/O access counts that are below a threshold level relative to a mean of LBA segment access counts for cached LBA segment addresses in the partial FTL table;
• and
• expanding the portion of RAM allocated for the partial FTL table cached therein to accommodate additional look-up addresses when no outlier LBA segments are detected among the cached FTL table look-up addresses.

An information handling system comprising:

• a solid state drive (SSD) controller and memory device including NAND flash memory, the SSD controller executing instructions of an SSD adaptive profiling engine for RAM cache optimization, wherein the SSD controller is configured to:
• access a database of logical block address (LBA) segment usage history and load a partial flash translation layer (FTL) table into random access memory (RAM) cache if a span of LBA segments with sufficient access counts is below a threshold level percentage of total LBA segments in the NAND flash memory;
• detect an outlier LBA segment having a look-up address in the cached, partial FTL table, wherein the outlier LBA segment has an input/output (I/O) access count below a statistical mean of access counts of other LBA segments represented in the partial FTL table;
• and
• evict an LBA segment look-up address corresponding to the outlier LBA segment from the cached, partial FTL table.