clarify qa-latency a bit

diff --git a/docs/markdown/recursor/stats.md b/docs/markdown/recursor/stats.md
index 514d15893dea6f1f0f066e267231bf5803040e98..469f6a5f69ecfbf4bb398aa88ce434af5286eb94 100644 (file)
--- a/docs/markdown/recursor/stats.md
+++ b/docs/markdown/recursor/stats.md
@@ -39,7 +39,7 @@ The `rec_control get` command can be used to query the following statistics, eit
 * `packetcache-hits`: packet cache hits (since 3.2)
 * `packetcache-misses`: packet cache misses (since 3.2)
 * `policy-drops`: packets dropped because of (Lua) policy decision
-* `qa-latency`: shows the current latency average, in microseconds
+* `qa-latency`: shows the current latency average, in microseconds, exponentially weighted over past 'latency-statistic-size' packets
 * `questions`: counts all end-user initiated queries with the RD bit set
 * `resource-limits`: counts number of queries that could not be performed because of resource limits
 * `security-status`: security status based on [security polling](../common/security.md#implementation)