Measuring performance can be useful for a number of reasons:
- You want accurate numbers on how long it takes for the QuasarDB daemon to insert a certain amount of data;
- You want to run a live analysis on where exactly the QuasarDB daemon is spending its time;
- You want on-line programmable response to certain actions inside QuasarDB.
For this purpose, the Linux build of the QuasarDB is instrumented with SystemTap probes. This document provides an example systemtap script you can use to monitor various latencies.