The desc ties this to the 'timeCollected' property of this compute node's PCIeFatalStats table — it is the timestamp of the last successful sampling cycle for this specific stats object. Operationally this tells you how fresh the acsViolation/malformedTLP/poisonedTLP/surpriseLinkDown counts actually are: if a server has gone unreachable, timeCollected stops advancing even though the object still returns its last-known counter values. For example, cucsComputePCIeFatalStatsTimeCollected stuck at a timestamp from three days ago while the server is known to still be running is itself a signal that PCIe stats polling for that blade has stalled, independent of whatever the error counts happen to show.