Qlik Sense Embedded Application Mashup Performance - Extensions\schema

With some environments clients may experience long running QRS calls related to /Extensions/Schema seen in their Embedded application and mashups. 

Environment: 

• Qlik Sense June 2018 (12.36.x) and above

Identifying the issue:

• Using Google Development Tools, you should be able to see this call as a long running thread. 
• Replicate the schema call in Postman to isolate this call as particularly slow. This can even be scripted to check every 30 seconds to a minute to check over all patterns. 
• Attempted to increase logs from Postgres to find possible long running requests.

How to improve performance:

Try isolating the database or moving to the local server. 

This issue is most likely caused by contention in standalone database environments of the instance when due to resources espcially when Qlik Sense Repository database is hosted with other databases in a clustered environment. Ultimately, tests should be performed to ascertain process of elimination that this contention is the cause.

Qlik has previously received feedback on this feature and recorded the request for future review.  For up to date information, please contact support at support.qlik.com referencing this article.