Here are just few general performance tuning guidelines for applications and OS using SSDs.

Aligned IO:

Aligned IO can have a tremendous impact on SSD performance and endurance. Aligned IO for an SSD gives efficiency to the device for managing the NAND writes and can also boost SSD endurance by reducing the number of Read-Modify-Write operations that cause extra writes to occur in the background on the SSD

Varying Queue Depths:

Queue depth is an important factor for systems and storage devices. Efficiencies can be gained from increasing queue depth to the SSD devices which allow for more efficient handling of write operations and may also help reduce write amplification that can affect the endurance life of the SSD.


Certain Operating Systems support the TRIM function, which translates deleted files to the associated LBA (logical block address) on the storage device (SSD). For SATA, the command is also called TRIM, for SAS, the command is called UNMAP. The TRIM/UNMAP command notifies the drive it no longer needs data in certain LBAs (Logical Block Address) which then free up a number of NAND pages.
The TRIM/UNMAP command needs to be supported by the OS, the drive, and the controller in order to work. The TRIM/UNMAP command could result in higher SSD performance from both the reduced data needed to be rewritten during garbage collection and the higher free space resulting on the drive.

Disable disk defragmentation:

On a magnetic drive, defragmentation organizes the drive in such a way that data sectors are close to one another to improve performance. However, on Solid State Drives, having the data close together makes no difference, since SSDs can access data at the same speed no matter where it is. Thus, defragmentation of SSDs isn’t necessary and can actually cause additional unnecessary NAND wearing.

Disable indexing:

Indexing usually speeds up searching on HDDs. However, it is not advantageous on SSDs. Because indexing constantly tries to maintain a database of the files on the system and its properties, it causes a lot of small writes, at which SSDs do not excel. But, SSDs do excel at reading, and thus the drive will be able to access the data quickly, even without an index.


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