This sets the verbosity level of the card's memory event logging, with a default of 6. Raising this above the default would be a deliberate diagnostic step to capture more granular memory-related logging detail while actively chasing a suspected leak or corruption issue, at the likely cost of higher log volume and possibly some additional processing overhead on the card while elevated. For example, an admin raises cardMemLogLevel above the default of 6 temporarily while trying to catch the exact moment a suspected memory leak begins accelerating.