I am using Talend enterprise data integration cluster edition 5.1.1. One of the jobs is extremely slow when it performs a join using the tmap component, so I was exploring various settings on this component and found "Enable parallel execution" attribute that is greyed out. I tried creating new components like tOracleInput, tForEach and tLoop. All of these components have this option greyed out by default. I couldn't find any documentation on this attribute. Could anyone shed some light on this please?