applying more config changes according to recommendations in the official c3p0 doc
further improvement by setting testConnectionOnCheckin = false, minPoolSize = 1 - effect verified by benchmarking on my laptop
switching back to c3p0 0.9.2 and removing the explicit log4j setting to solve probelms with lost connetions in jndi
trying to avoid excessive connection testing and to quickly reduce the number of connections in the pools
following 'Simple advice on Connection testing' : testConnectionOnCheckout = true
fixing #2243 "c3p0 connection pool is loosing connection over night"
cdm-server as separate project