This read-only Gauge32 field is the 'memCachedMax' property of the 'FexSystemStatsHist' managed object in Cisco UCS Manager's equipment-inventory schema recording the highest cache-memory figure reached during the interval this archived sample covers. This preserves the most generous caching moment from a past interval, a number that looks large but is normal and reversible cache behavior rather than a sign of trouble. An archived MemCachedMax of 55MB right after a bulk log rotation, followed by later samples settling lower, documents ordinary cache growth and shrinkage.