Constant ENTRY_STATS_PROPERTY 

const ENTRY_STATS_PROPERTY: &str = "rocksdb.block-cache-entry-stats";

Multi-line cache-entry stats blob. Live variant forces a fresh collection per call; the “fast” variant returns a cached snapshot and is unsuitable for admin diagnostics since it never refreshes within a session. The string surface is what property_value_cf returns; the structured map form is C++-only.