Step 2. Significant garbage collection activity?

Is there significant garbage collection activity?

How do I know?
  1. Display the Tier Flow Map.
  2. Click the Nodes tab, and then click the Memory tab.
  3. Sort by GC Time Spent to see how many milliseconds per minute is being spent on GC; 60,000 indicates 100%.
    If GC Time Spent is higher than 500 ms, the answer to the question in Step 5 is Yes. Otherwise, the answer is No.