Oops, left out an index I needed.

sql/database-create.sql

@@ -2378,7 +2378,8 @@ CREATE TABLE `node_history` (
   PRIMARY KEY  (`history_id`),
   KEY `node_id` (`node_id`,`history_id`),
   INDEX `exptidx` (`exptidx`),
-  INDEX `stamp` (`stamp`)
+  INDEX `stamp` (`stamp`),
+  INDEX `cnet_ip` (`cnet_ip`)
 ) ENGINE=MyISAM DEFAULT CHARSET=latin1;
 
 --

sql/updates/4/289

@@ -16,6 +16,10 @@ sub DoUpdate($$$)
 	DBQueryFatal("alter table node_history add " .
 		     "  INDEX stamp (stamp)");
     }
+    if (!DBKeyExists("node_history", "cnet_ip")) {
+	DBQueryFatal("alter table node_history add " .
+		     "  INDEX cnet_ip (cnet_ip)");
+    }
     return 0;
 }