This chart shows that MapR-DB (the database in the MapR Enterprise Database Edition, formerly known as M7) (in blue) consistency reads data quickly with no spikes.
Other distributions suffer from periodic “housekeeping” tasks like compactions (defragmentation) and garbage collection, leading to sharp spikes in read delays.
Graph of each step in the pipeline for every run. This graph shows how important it is to measure everything. Some steps have been greatly reduced or eliminated. Light blue is the matching step. You can see it going quadratic and then the change when ‘J’ Jermline was released.