What are the various graphs will show memory consumption and performance degration?
Memory object has many counters and out of which, Memory\Available Bytes is the counter which gives you the statistics of the available memory through out the test execution. Deduct the available memory from the total memory which gives the committed memory. For eg. If you have 24GB memory available for your server machine deduct the available memory from it which gives you the Committed memory. Based on which you can go with the required graph and ensure the percentage of memory committed during the test execution. If you see more amount of memory committed during test execution than the SLA you can report it.
Also make sure that the memory utilization graph goes high when the load is increased.