diff --git a/doc/Changelog b/doc/Changelog
index f695d7f4e..488b107c0 100644
--- a/doc/Changelog
+++ b/doc/Changelog
@@ -1,3 +1,10 @@
+16 April 2025: Wouter
+	- Increase default to `num-queries-per-thread: 2048`, when unbound is
+	  compiled with libevent. It makes saturation of the task queue more
+	  resource intensive and less practical. Thanks to Shiming Liu,
+	  Network and Information Security Lab, Tsinghua University for the
+	  report.
+
 11 April 2025: Yorgos
 	- Merge #1265: Fix WSAPoll.
 
diff --git a/doc/example.conf.in b/doc/example.conf.in
index fdef9ef37..db54f9739 100644
--- a/doc/example.conf.in
+++ b/doc/example.conf.in
@@ -163,7 +163,7 @@ server:
 	# msg-cache-slabs: 4
 
 	# the number of queries that a thread gets to service.
-	# num-queries-per-thread: 1024
+	# num-queries-per-thread: 2048
 
 	# if very busy, 50% queries run to completion, 50% get timeout in msec
 	# jostle-timeout: 200
diff --git a/doc/unbound.conf.5.in b/doc/unbound.conf.5.in
index 21dbd73e6..4c7ea9f75 100644
--- a/doc/unbound.conf.5.in
+++ b/doc/unbound.conf.5.in
@@ -268,7 +268,7 @@ The number of queries that every thread will service simultaneously.
 If more queries arrive that need servicing, and no queries can be jostled out
 (see \fIjostle\-timeout\fR), then the queries are dropped. This forces
 the client to resend after a timeout; allowing the server time to work on
-the existing queries. Default depends on compile options, 512 or 1024.
+the existing queries. Default depends on compile options, 512 or 2048.
 .TP
 .B jostle\-timeout: \fI<msec>
 Timeout used when the server is very busy.  Set to a value that usually
@@ -280,7 +280,7 @@ service by slow queries or high query rates.  Default 200 milliseconds.
 The effect is that the qps for long-lasting queries is about
 (numqueriesperthread / 2) / (average time for such long queries) qps.
 The qps for short queries can be about (numqueriesperthread / 2)
-/ (jostletimeout in whole seconds) qps per thread, about (1024/2)*5 = 2560
+/ (jostletimeout in whole seconds) qps per thread, about (2048/2)*5 = 5120
 qps by default.
 .TP
 .B delay\-close: \fI<msec>
diff --git a/util/config_file.c b/util/config_file.c
index 81bffa8d8..7566d690c 100644
--- a/util/config_file.c
+++ b/util/config_file.c
@@ -155,7 +155,7 @@ config_create(void)
 #  else
 	/* libevent can use many sockets */
 	cfg->outgoing_num_ports = 4096;
-	cfg->num_queries_per_thread = 1024;
+	cfg->num_queries_per_thread = 2048;
 #  endif
 	cfg->outgoing_num_tcp = 10;
 	cfg->incoming_num_tcp = 10;