Solution : https://service.sap.com/sap/support/notes/382216 (SAP Service marketplace login required)
Key words : 
additional key words query, access takes place, symptom long runtimes, infoset query, longer runtimes, infosets catalog, transactions sq01, title texts, title text, system language
Related Notes : 
       
| 380304 | InfoSet Query: Performance improvements |