This Unsigned32 is a lifetime count of valid samples that the Adjustment TCA feature has actually collected and used for this PM instance, per its DESCRIPTION. Comparing this against SamplesDiscardedTotal tells you how reliable the TCA feature's view of this port has actually been over its lifetime -- a healthy instance should show the vast majority of its samples processed rather than discarded, so a surprisingly low ratio here is a reason to distrust any TCA conclusions drawn from this instance's history. For example, an instance showing 50,000 processed samples against only 12 discarded ones has a solid, trustworthy TCA history, whereas one showing anywhere close to a 1:1 processed-to-discarded ratio should have its TCA events treated with real skepticism.