add additional debug message about flushing databases

Author: Phil McLean

src/new_index/schema.rs

@@ -374,9 +374,14 @@ impl Indexer {
         self.start_auto_compactions(&self.store.cache_db);
 
         if let DBFlush::Disable = self.flush {
-            debug!("flushing to disk");
+            debug!("flushing txstore_db disk");
             self.store.txstore_db.flush();
+            debug!("flushing txstore_db complete");
+
+            debug!("flushing history_db disk");
             self.store.history_db.flush();
+            debug!("flushing history_db complete");
+
             self.flush = DBFlush::Enable;
         }