v0.30.0

src/cache/invalidation/invalidate.rs

@@ -103,6 +103,20 @@ impl Cache {
                 {
                     let mut store = self.store.lock().unwrap_or_else(|e| e.into_inner());
                     store.generation = store.generation.wrapping_add(1);
+                    // This global publication barrier invalidates every older
+                    // ticket and pending COLD demotion. Per-key generations only
+                    // need to cover the current purge, not every key ever
+                    // purged over the lifetime of the process. Without clearing
+                    // them, repeated PURGEs of distinct URLs grow this map
+                    // indefinitely even after the objects have been evicted.
+                    // Release an unusually large index's backing allocation
+                    // after mass invalidations instead of retaining its peak
+                    // bucket capacity for the rest of the process lifetime.
+                    if store.key_generations.capacity() > 256 {
+                        store.key_generations = Default::default();
+                    } else {
+                        store.key_generations.clear();
+                    }
                 }
                 let affected = self.purge_matcher(&matcher);
                 self.counters.purges.fetch_add(1, Ordering::Relaxed);