From a056dad8b359ebab1c34c94b763b5519b066cb76 Mon Sep 17 00:00:00 2001
From: Rainer Gerhards <rgerhards@adiscon.com>
Date: Tue, 5 Nov 2013 18:13:02 +0100
Subject: emit warning message if queue.size is set dangerously low

---
 runtime/queue.c | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'runtime/queue.c')

diff --git a/runtime/queue.c b/runtime/queue.c
index 935a8106..3834343c 100644
--- a/runtime/queue.c
+++ b/runtime/queue.c
@@ -2084,6 +2084,13 @@ qqueueStart(qqueue_t *pThis) /* this is the ConstructionFinalizer */
 			break;
 	}
 
+	if(pThis->iMaxQueueSize < 100) {
+		errmsg.LogError(0, RS_RET_OK_WARN, "Note: queue.size=\"%d\" is very "
+			"low and can lead to unpredictable results. See also "
+			"http://www.rsyslog.com/lower-bound-for-queue-sizes/",
+			pThis->iMaxQueueSize);
+	}
+
 	if(pThis->iFullDlyMrk == -1)
 		pThis->iFullDlyMrk  = pThis->iMaxQueueSize
 			- (pThis->iMaxQueueSize / 100) *  3; /* default 97% */
-- 
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