What is the footprint of Esper in a typical installation, i.e. what is the RAM, disk and CPU usage?
The kernel itself if very lightweight and fits in a few MB heap (in RAM). The disk usage is also limited (logs, jar file of a about 2 MB incl. third party jars, and a few KB for configuration files). The CPU consumption is a factor of the events entering and exiting the system, and also of the actual listeners you register with the statements. The heap consumption (RAM) is proportional to the number of streams and statements you deal with and the window sizes (correlating / computing average over 100 events or 100000 events, or for 10 seconds or 10 days). For more information, please check the performance section in the reference documentation.
