Solution : https://service.sap.com/sap/support/notes/1388143 (SAP Service marketplace login required)
Key words : 
/usr/sap/<sid>/jc<instance number>/j2ee/admin, configuration management -> infrastructure -> java system properties -> tab applications, change mode -> double-click propertysheet application, terms sap netweaver development infrastructure, -> tc~sl~cms~pcs -> appcfg, server -> services - > configuration adapter, tc~sl~cms~pcs, typical sld response times, software component synchronization reason, change management service
Related Notes : 
       
| 1383798 | Long response times in the System Landscape Directory | 
| 1069797 | Long wait times for dependencies of software components | 
| 754143 | CMS remarks/restrictions |