Document that qsize-q will never give meaningful metrics with a single receiver thread.

diff --git a/docs/performance.rst b/docs/performance.rst
index 8c44ef24663f9a23d0cc778146806d24c947dd24..759c59951647407a97b803e579e25d1c7f8d4279 100644 (file)
--- a/docs/performance.rst
+++ b/docs/performance.rst
@@ -260,7 +260,7 @@ Amount of packets in the packetcache
 
 qsize-q
 ^^^^^^^
-Number of packets waiting for database attention
+Number of packets waiting for database attention, only available if :ref:`setting-receiver-threads` > 1
 
 .. _stat-query-cache-hit: