Controlling SSD performance by queue depth

A method comprising:

• monitoring a request queue to a semiconductor storage device (an SSD), the request queue having a depth and comprising at least a first request, a second request, and an outgoing interval between the requests;
• and
• responsive to the outgoing interval being less than a target interval based on a normalized difference of a target queue depth and the queue depth, setting an actual outgoing interval to be no less than the target interval and acting on the second request after expiration of the target interval.

A system comprising:

• a solid state device (SSD) and a host;
• and
• an interval throttling module stored in memory and implemented by a processor, the interval throttling module located in a data request completion path of the system and comprising a queue memory unit, a delay unit configured to delay acting on a second request if an outgoing interval between a first request and the second request is less than a target interval, and a calculator unit configured to dynamically adjust the target interval based on a normalized difference of a queue depth and a throttle queue depth.