don't spam the logs quite as much on first startup

sleep the thread 1 second every round until we're actually updating
members

controller/PostgreSQL.cpp

@@ -1684,6 +1684,7 @@ void PostgreSQL::onlineNotification_Redis()
 	while (_run == 1) {
 		fprintf(stderr, "onlineNotification tick\n");
 		auto start = std::chrono::high_resolution_clock::now();
+		uint64_t count = 0;
 
 		std::unordered_map< std::pair<uint64_t,uint64_t>,std::pair<int64_t,InetAddress>,_PairHasher > lastOnline;
 		{
@@ -1694,10 +1695,10 @@ void PostgreSQL::onlineNotification_Redis()
 			if (!lastOnline.empty()) {
 				if (_rc->clusterMode) {
 					auto tx = _cluster->transaction(controllerId, true);
-					_doRedisUpdate(tx, controllerId, lastOnline);
+					count = _doRedisUpdate(tx, controllerId, lastOnline);
 				} else {
 					auto tx = _redis->transaction(true);
-					_doRedisUpdate(tx, controllerId, lastOnline);
+					count = _doRedisUpdate(tx, controllerId, lastOnline);
 				}
 			}
 		} catch (sw::redis::Error &e) {
@@ -1710,11 +1711,15 @@ void PostgreSQL::onlineNotification_Redis()
 
 		fprintf(stderr, "onlineNotification ran in %llu ms\n", total);
 
-		std::this_thread::yield();
+		if (count > 0) {
+			std::this_thread::yield();
+		} else {
+			std::this_thread::sleep_for(std::chrono::seconds(1));
+		}
 	}
 }
 
-void PostgreSQL::_doRedisUpdate(sw::redis::Transaction &tx, std::string &controllerId, 
+uint64_t PostgreSQL::_doRedisUpdate(sw::redis::Transaction &tx, std::string &controllerId,
 	std::unordered_map< std::pair<uint64_t,uint64_t>,std::pair<int64_t,InetAddress>,_PairHasher > &lastOnline) 
 
 {
@@ -1778,6 +1783,8 @@ void PostgreSQL::_doRedisUpdate(sw::redis::Transaction &tx, std::string &control
 	}
 	tx.exec();
 	fprintf(stderr, "%s: Updated online status of %d members\n", _myAddressStr.c_str(), count);
+
+	return count;
 }
 
 

controller/PostgreSQL.hpp

@@ -138,7 +138,7 @@ private:
 	void onlineNotificationThread();
 	void onlineNotification_Postgres();
 	void onlineNotification_Redis();
-	void _doRedisUpdate(sw::redis::Transaction &tx, std::string &controllerId, 
+	uint64_t _doRedisUpdate(sw::redis::Transaction &tx, std::string &controllerId,
 		std::unordered_map< std::pair<uint64_t,uint64_t>,std::pair<int64_t,InetAddress>,_PairHasher > &lastOnline);
 
 	enum OverrideMode {