Log when using larger than default pruning cache (#7066)

src/Nethermind/Nethermind.Init/InitializeStateDb.cs

@@ -74,7 +74,7 @@ public Task Execute(CancellationToken cancellationToken)
 
         if (pruningConfig.PruningBoundary < 64)
         {
-            if (_logger.IsWarn) _logger.Warn($"Prunig boundary must be at least 64. Setting to 64.");
+            if (_logger.IsWarn) _logger.Warn($"Pruning boundary must be at least 64. Setting to 64.");
             pruningConfig.PruningBoundary = 64;
         }
 
@@ -98,6 +98,12 @@ public Task Execute(CancellationToken cancellationToken)
                 persistenceStrategy = persistenceStrategy.Or(triggerPersistenceStrategy);
             }
 
+            if ((_api.NodeStorageFactory.CurrentKeyScheme != INodeStorage.KeyScheme.Hash || initConfig.StateDbKeyScheme == INodeStorage.KeyScheme.HalfPath)
+                && pruningConfig.CacheMb > 2000)
+            {
+                if (_logger.IsWarn) _logger.Warn($"Detected {pruningConfig.CacheMb}MB of pruning cache config. Pruning cache more than 2000MB is not recommended as it may cause long memory pruning time which affect attestation.");
+            }
+
             pruningStrategy = Prune
                 .WhenCacheReaches(pruningConfig.CacheMb.MB())
                 // Use of ratio, as the effectiveness highly correlate with the amount of keys per snapshot save which