From 58d30b1323344913875ada00828c1d17de0b108c Mon Sep 17 00:00:00 2001
From: "Sascha L. Teichmann" <sascha.teichmann@intevation.de>
Date: Sun, 21 Sep 2014 13:18:13 +0200
Subject: [PATCH] mtwebmapper: Do not fire up too many base tile re-generator
 workers if there is not much to do.

---
 cmd/mtwebmapper/tilesupdater.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cmd/mtwebmapper/tilesupdater.go b/cmd/mtwebmapper/tilesupdater.go
index 11df3c3..ab1690e 100644
--- a/cmd/mtwebmapper/tilesupdater.go
+++ b/cmd/mtwebmapper/tilesupdater.go
@@ -100,7 +100,7 @@ func (tu *tileUpdater) doUpdates() {
 		jobs := make(chan xz)
 		var done sync.WaitGroup
 
-		for i := 0; i < tu.workers; i++ {
+		for i, n := 0, min(tu.workers, len(changes)); i < n; i++ {
 			var client *common.RedisClient
 			var err error
 			if client, err = common.NewRedisClient("tcp", tu.redisAddress); err != nil {