reduce the routerinfo expiration a little

router/java/src/net/i2p/router/networkdb/kademlia/KademliaNetworkDatabaseFacade.java

@@ -659,7 +659,7 @@ public class KademliaNetworkDatabaseFacade extends NetworkDatabaseFacade {
     String validate(Hash key, RouterInfo routerInfo) throws IllegalArgumentException {
         long now = _context.clock().now();
         boolean upLongEnough = _context.router().getUptime() > 60*60*1000;
-        // Once we're over 150 routers, reduce the expiration time down from the default,
+        // Once we're over 120 routers, reduce the expiration time down from the default,
         // as a crude way of limiting memory usage.
         // i.e. at 300 routers the expiration time will be about half the default, etc.
         // And if we're floodfill, we can keep the expiration really short, since
@@ -673,7 +673,7 @@ public class KademliaNetworkDatabaseFacade extends NetworkDatabaseFacade {
             // _kb.size() includes leasesets but that's ok
             adjustedExpiration = Math.min(ROUTER_INFO_EXPIRATION,
                                           ROUTER_INFO_EXPIRATION_MIN +
-                                          ((ROUTER_INFO_EXPIRATION - ROUTER_INFO_EXPIRATION_MIN) * 150 / (_kb.size() + 1)));
+                                          ((ROUTER_INFO_EXPIRATION - ROUTER_INFO_EXPIRATION_MIN) * 120 / (_kb.size() + 1)));
 
         if (!key.equals(routerInfo.getIdentity().getHash())) {
             if (_log.shouldLog(Log.WARN))