Hi,
Would suggest you to check out the below link:
https://comm.support.ca.com/kb/baselineengineqosmessage-queue-is-piling-up-and-is-yellow-in-the-hub-queue/kb000004425
If the issue still exists after following the above link, might be worth increasing the baseline engine probe memory (check if there is free memory available)
Note:
The below procedure will restart baseline_engine probe
From Infrastructure Manager -> Open the baseline_engine probe in Raw Configure Mode (press the shift key and right click the baseline_engine probe -> select Raw Configure) -> expand startup on the left side (click the + icon) -> select opt
-> click on java_mem_max -> click on Edit Key -> Replace the default value -Xmx1024m with -Xmx2048m (or) -Xmx3096m
-> click on java_mem_init -> click on Edit Key -> Replace the existing default value -Xms64m with -Xmx512m (or) -Xmx1024m
Click on Apply and OK
All the best!