The ucsrv.ini contains the entry parallelDBConnections. Is there a more detailed explanation on what this does?
The maximal number of parallel connections to the database so requests can be processed at the same time
Release : 12.3
Component : AUTOMATION ENGINE
The value of parallelDbConnections determines the maximum amount (= largest possible size of the connection pool available to a JCP) of parallel database sessions opened by a single JCP to the database.
This value is per-process.
If all connections are busy a jetty thread has to wait until a connection is added back to the pool.