Garbage Collection for SAP Lumira

The default settings for the latest edition of Lumira appear to be the preferred settings.

I recently installed the Lumira 2.1 SP1 add-on as part of upgrading a customer to SAP BusinessObjects Business Intelligence SP5. Then I performed a landscape analysis using the SAP BI Platform Support Tool, as I’m always curious what kinds of observations it makes.

The Platform Support Tool currently has an alert regarding the default garbage collection method for SAP Lumira.

Checks the command line on all APS servers with a “LumiraServerServiceContainer” service for the argument “-XX:+UseConcMarkSweepGC”. Alert is triggered if the argument is missing.

Sometimes the Platform Support Tool makes a recommendation I’m not familiar with, so I try to confirm the recommendation against the SAP knowledge base. In this case, I found SAP KB 2578661, which recommends switching from "-XX:+UseConcMarkSweepGC" (the garbage collector recommended by the Platform Support Tool) to "-XX:+UseG1GC -XX:MaxGCPauseMillis=200 -XX:+UseStringDeduplication", which are default settings for the Lumira 2.1 SP1 Adaptive Processing Server.

I assume that the Lumira rule will be revisited in a future release of the Platform Support Tool (UPDATE: version 2.1 SP2 will give specific guidance depending on the Lumira version detected). But in the meantime, I kept the default settings intact. This customer is brand-new to Lumira and it will be a few weeks or months before there are Lumira Designer dashboards to test. But we’ll be ready, as CA ADM Introscope is installed as part of the BI landscape. We’ll be able to monitor in real-time how well the Lumira Adaptive Processing Server performs garbage collection with production dashboards and make changes if we see a benefit.

Have you made any interesting modifications to Lumira settings, documented or otherwise?