diff --git a/modules/context/context.go b/modules/context/context.go
index 0cbdfa023c6b6..6c7f648519a1e 100644
--- a/modules/context/context.go
+++ b/modules/context/context.go
@@ -232,7 +232,7 @@ func (ctx *Context) NotFound(logMsg string, logErr error) {
 
 func (ctx *Context) notFoundInternal(logMsg string, logErr error) {
 	if logErr != nil {
-		log.ErrorWithSkip(2, "%s: %v", logMsg, logErr)
+		log.Log(2, log.DEBUG, "%s: %v", logMsg, logErr)
 		if !setting.IsProd {
 			ctx.Data["ErrorMsg"] = logErr
 		}
@@ -248,7 +248,7 @@ func (ctx *Context) notFoundInternal(logMsg string, logErr error) {
 	}
 
 	if !showHTML {
-		ctx.PlainText(http.StatusNotFound, "Not found.\n")
+		ctx.plainTextInternal(3, http.StatusNotFound, []byte("Not found.\n"))
 		return
 	}
 
@@ -286,21 +286,27 @@ func (ctx *Context) NotFoundOrServerError(logMsg string, errCheck func(error) bo
 }
 
 // PlainTextBytes renders bytes as plain text
-func (ctx *Context) PlainTextBytes(status int, bs []byte) {
-	if (status/100 == 4) || (status/100 == 5) {
-		log.Error("PlainTextBytes: %s", string(bs))
+func (ctx *Context) plainTextInternal(skip, status int, bs []byte) {
+	statusPrefix := status / 100
+	if statusPrefix == 4 || statusPrefix == 5 {
+		log.Log(skip, log.TRACE, "plainTextInternal (status=%d): %s", status, string(bs))
 	}
 	ctx.Resp.WriteHeader(status)
 	ctx.Resp.Header().Set("Content-Type", "text/plain;charset=utf-8")
 	ctx.Resp.Header().Set("X-Content-Type-Options", "nosniff")
 	if _, err := ctx.Resp.Write(bs); err != nil {
-		log.Error("Write bytes failed: %v", err)
+		log.ErrorWithSkip(skip, "plainTextInternal (status=%d): write bytes failed: %v", status, err)
 	}
 }
 
+// PlainTextBytes renders bytes as plain text
+func (ctx *Context) PlainTextBytes(status int, bs []byte) {
+	ctx.plainTextInternal(2, status, bs)
+}
+
 // PlainText renders content as plain text
 func (ctx *Context) PlainText(status int, text string) {
-	ctx.PlainTextBytes(status, []byte(text))
+	ctx.plainTextInternal(2, status, []byte(text))
 }
 
 // RespHeader returns the response header
diff --git a/modules/queue/workerpool.go b/modules/queue/workerpool.go
index 3eeebaa1a00db..fd56f782d4f9d 100644
--- a/modules/queue/workerpool.go
+++ b/modules/queue/workerpool.go
@@ -118,7 +118,7 @@ func (p *WorkerPool) zeroBoost() {
 		boost = p.maxNumberOfWorkers - p.numberOfWorkers
 	}
 	if mq != nil {
-		log.Warn("WorkerPool: %d (for %s) has zero workers - adding %d temporary workers for %s", p.qid, mq.Name, boost, p.boostTimeout)
+		log.Debug("WorkerPool: %d (for %s) has zero workers - adding %d temporary workers for %s", p.qid, mq.Name, boost, p.boostTimeout)
 
 		start := time.Now()
 		pid := mq.RegisterWorkers(boost, start, true, start.Add(p.boostTimeout), cancel, false)
@@ -126,7 +126,7 @@ func (p *WorkerPool) zeroBoost() {
 			mq.RemoveWorkers(pid)
 		}
 	} else {
-		log.Warn("WorkerPool: %d has zero workers - adding %d temporary workers for %s", p.qid, p.boostWorkers, p.boostTimeout)
+		log.Debug("WorkerPool: %d has zero workers - adding %d temporary workers for %s", p.qid, p.boostWorkers, p.boostTimeout)
 	}
 	p.lock.Unlock()
 	p.addWorkers(ctx, cancel, boost)
@@ -163,7 +163,7 @@ func (p *WorkerPool) pushBoost(data Data) {
 				boost = p.maxNumberOfWorkers - p.numberOfWorkers
 			}
 			if mq != nil {
-				log.Warn("WorkerPool: %d (for %s) Channel blocked for %v - adding %d temporary workers for %s, block timeout now %v", p.qid, mq.Name, ourTimeout, boost, p.boostTimeout, p.blockTimeout)
+				log.Debug("WorkerPool: %d (for %s) Channel blocked for %v - adding %d temporary workers for %s, block timeout now %v", p.qid, mq.Name, ourTimeout, boost, p.boostTimeout, p.blockTimeout)
 
 				start := time.Now()
 				pid := mq.RegisterWorkers(boost, start, true, start.Add(p.boostTimeout), boostCtxCancel, false)
@@ -173,7 +173,7 @@ func (p *WorkerPool) pushBoost(data Data) {
 					boostCtxCancel()
 				}()
 			} else {
-				log.Warn("WorkerPool: %d Channel blocked for %v - adding %d temporary workers for %s, block timeout now %v", p.qid, ourTimeout, p.boostWorkers, p.boostTimeout, p.blockTimeout)
+				log.Debug("WorkerPool: %d Channel blocked for %v - adding %d temporary workers for %s, block timeout now %v", p.qid, ourTimeout, p.boostWorkers, p.boostTimeout, p.blockTimeout)
 			}
 			go func() {
 				<-time.After(p.boostTimeout)