diff --git a/bind.spec b/bind.spec
index 3691b38f0525a83f828522f97cb0cb5f09232822..c0bee129c5765ee30f9fc36b60d1768916d3ab8e 100644
--- a/bind.spec
+++ b/bind.spec
@@ -30,7 +30,7 @@ Summary:  The Berkeley Internet Name Domain (BIND) DNS (Domain Name System) serv
 Name:     bind
 License:  MPLv2.0
 Version:  9.16.23
-Release:  5
+Release:  6
 Epoch:    32
 Url:      https://www.isc.org/downloads/bind/
 #
@@ -79,6 +79,8 @@ Patch157:bind-9.11-fips-tests.patch
 # https://gitlab.isc.org/isc-projects/bind9/-/merge_requests/2689
 Patch164:bind-9.11-rh1666814.patch
 
+Patch9000:bugfix-limit-numbers-of-test-threads.patch
+
 %{?systemd_ordering}
 Requires:       coreutils
 Requires:       shadow-utils
@@ -371,6 +373,8 @@ in HTML and PDF format.
 %patch157 -p1 -b .fips-tests
 %patch164 -p1 -b .rh1666814
 
+%patch9000 -p1
+
 %if %{with PKCS11}
 %patch135 -p1 -b .config-pkcs11
 cp -r bin/named{,-pkcs11}
@@ -1092,6 +1096,12 @@ fi;
 %endif
 
 %changelog
+* Wed Feb 09 2022 jiangheng<jiangheng12@huawei.com> - 9.16.23-6
+- Type:bugfix
+- CVE:NA
+- SUG:NA
+- DESC:limit number of test threads to reduce test execution time
+
 * Tue Jan 18 2022 jiangheng<jiangheng12@huawei.com> - 9.16.23-5
 - Type:bugfix
 - CVE:NA
diff --git a/bugfix-limit-numbers-of-test-threads.patch b/bugfix-limit-numbers-of-test-threads.patch
new file mode 100644
index 0000000000000000000000000000000000000000..6115096cc13bdc365035da31befd4c4702bea710
--- /dev/null
+++ b/bugfix-limit-numbers-of-test-threads.patch
@@ -0,0 +1,39 @@
+From 1d9843b58800b51e1366fba5e0bdef5f0336efaf Mon Sep 17 00:00:00 2001
+From: jiangheng <jiangheng12@huawei.com>
+Date: Wed, 9 Feb 2022 16:21:10 +0800
+Subject: [PATCH] limit numbers of test threads to reduce execution time
+
+---
+ lib/dns/tests/dnstest.c | 2 +-
+ lib/ns/tests/nstest.c   | 2 +-
+ 2 files changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/lib/dns/tests/dnstest.c b/lib/dns/tests/dnstest.c
+index 465ce9f..263b0d6 100644
+--- a/lib/dns/tests/dnstest.c
++++ b/lib/dns/tests/dnstest.c
+@@ -114,7 +114,7 @@ cleanup_managers(void) {
+ static isc_result_t
+ create_managers(void) {
+ 	isc_result_t result;
+-	ncpus = isc_os_ncpus();
++	ncpus = ISC_MIN(isc_os_ncpus(), 8);
+ 
+ 	CHECK(isc_managers_create(dt_mctx, ncpus, 0, &netmgr, &taskmgr));
+ 	CHECK(isc_timermgr_create(dt_mctx, &timermgr));
+diff --git a/lib/ns/tests/nstest.c b/lib/ns/tests/nstest.c
+index 238450d..b5fa00c 100644
+--- a/lib/ns/tests/nstest.c
++++ b/lib/ns/tests/nstest.c
+@@ -243,7 +243,7 @@ create_managers(void) {
+ 	in_port_t port = 5300 + isc_random8();
+ 	ns_listenlist_t *listenon = NULL;
+ 	isc_event_t *event = NULL;
+-	ncpus = isc_os_ncpus();
++	ncpus = ISC_MIN(isc_os_ncpus(), 8);
+ 
+ 	CHECK(isc_managers_create(mctx, ncpus, 0, &netmgr, &taskmgr));
+ 	CHECK(isc_task_create_bound(taskmgr, 0, &maintask, 0));
+-- 
+1.8.3.1
+