diff --git a/configs/open5gs/amf.yaml.in b/configs/open5gs/amf.yaml.in
index 0be636d17..d9daedb0f 100644
--- a/configs/open5gs/amf.yaml.in
+++ b/configs/open5gs/amf.yaml.in
@@ -268,7 +268,7 @@ max:
 #   To connect more UEs, you need to increase the size further.
 #
 #   - Pool-size 128         => 65536 Number
-#   - Pool-size 256         => 8192 Number
+#   - Pool-size 256         => 16384 Number
 #   - Pool-size 512         => 4096 Number
 #   - Pool-size 1024        => 1024 Number
 #   - Pool-size 2048        => 512 Number
@@ -276,7 +276,7 @@ max:
 #   - Pool-size 1024*1024   => 8 Number
 #
 #    128:  65536
-#    256:  8192
+#    256:  16384
 #    512:  4096
 #    1024: 1024
 #    2048: 512
diff --git a/configs/open5gs/ausf.yaml.in b/configs/open5gs/ausf.yaml.in
index e88560a05..8692271d1 100644
--- a/configs/open5gs/ausf.yaml.in
+++ b/configs/open5gs/ausf.yaml.in
@@ -140,7 +140,7 @@ max:
 #   To connect more UEs, you need to increase the size further.
 #
 #   - Pool-size 128         => 65536 Number
-#   - Pool-size 256         => 8192 Number
+#   - Pool-size 256         => 16384 Number
 #   - Pool-size 512         => 4096 Number
 #   - Pool-size 1024        => 1024 Number
 #   - Pool-size 2048        => 512 Number
@@ -148,7 +148,7 @@ max:
 #   - Pool-size 1024*1024   => 8 Number
 #
 #    128:  65536
-#    256:  8192
+#    256:  16384
 #    512:  4096
 #    1024: 1024
 #    2048: 512
diff --git a/configs/open5gs/hss.yaml.in b/configs/open5gs/hss.yaml.in
index c38d77f33..d07602bfb 100644
--- a/configs/open5gs/hss.yaml.in
+++ b/configs/open5gs/hss.yaml.in
@@ -66,7 +66,7 @@ max:
 #   To connect more UEs, you need to increase the size further.
 #
 #   - Pool-size 128         => 65536 Number
-#   - Pool-size 256         => 8192 Number
+#   - Pool-size 256         => 16384 Number
 #   - Pool-size 512         => 4096 Number
 #   - Pool-size 1024        => 1024 Number
 #   - Pool-size 2048        => 512 Number
@@ -74,7 +74,7 @@ max:
 #   - Pool-size 1024*1024   => 8 Number
 #
 #    128:  65536
-#    256:  8192
+#    256:  16384
 #    512:  4096
 #    1024: 1024
 #    2048: 512
diff --git a/configs/open5gs/mme.yaml.in b/configs/open5gs/mme.yaml.in
index dfba21014..e1968dd08 100644
--- a/configs/open5gs/mme.yaml.in
+++ b/configs/open5gs/mme.yaml.in
@@ -377,7 +377,7 @@ max:
 #   To connect more UEs, you need to increase the size further.
 #
 #   - Pool-size 128         => 65536 Number
-#   - Pool-size 256         => 8192 Number
+#   - Pool-size 256         => 16384 Number
 #   - Pool-size 512         => 4096 Number
 #   - Pool-size 1024        => 1024 Number
 #   - Pool-size 2048        => 512 Number
@@ -385,7 +385,7 @@ max:
 #   - Pool-size 1024*1024   => 8 Number
 #
 #    128:  65536
-#    256:  8192
+#    256:  16384
 #    512:  4096
 #    1024: 1024
 #    2048: 512
diff --git a/configs/open5gs/nrf.yaml.in b/configs/open5gs/nrf.yaml.in
index 95ccafe44..c3d47e068 100644
--- a/configs/open5gs/nrf.yaml.in
+++ b/configs/open5gs/nrf.yaml.in
@@ -112,7 +112,7 @@ max:
 #   To connect more UEs, you need to increase the size further.
 #
 #   - Pool-size 128         => 65536 Number
-#   - Pool-size 256         => 8192 Number
+#   - Pool-size 256         => 16384 Number
 #   - Pool-size 512         => 4096 Number
 #   - Pool-size 1024        => 1024 Number
 #   - Pool-size 2048        => 512 Number
@@ -120,7 +120,7 @@ max:
 #   - Pool-size 1024*1024   => 8 Number
 #
 #    128:  65536
-#    256:  8192
+#    256:  16384
 #    512:  4096
 #    1024: 1024
 #    2048: 512
diff --git a/configs/open5gs/pcf.yaml.in b/configs/open5gs/pcf.yaml.in
index 938497a8c..d7ddd111f 100644
--- a/configs/open5gs/pcf.yaml.in
+++ b/configs/open5gs/pcf.yaml.in
@@ -142,7 +142,7 @@ max:
 #   To connect more UEs, you need to increase the size further.
 #
 #   - Pool-size 128         => 65536 Number
-#   - Pool-size 256         => 8192 Number
+#   - Pool-size 256         => 16384 Number
 #   - Pool-size 512         => 4096 Number
 #   - Pool-size 1024        => 1024 Number
 #   - Pool-size 2048        => 512 Number
@@ -150,7 +150,7 @@ max:
 #   - Pool-size 1024*1024   => 8 Number
 #
 #    128:  65536
-#    256:  8192
+#    256:  16384
 #    512:  4096
 #    1024: 1024
 #    2048: 512
diff --git a/configs/open5gs/pcrf.yaml.in b/configs/open5gs/pcrf.yaml.in
index 08a176cc1..ad6c98a5d 100644
--- a/configs/open5gs/pcrf.yaml.in
+++ b/configs/open5gs/pcrf.yaml.in
@@ -69,7 +69,7 @@ max:
 #   To connect more UEs, you need to increase the size further.
 #
 #   - Pool-size 128         => 65536 Number
-#   - Pool-size 256         => 8192 Number
+#   - Pool-size 256         => 16384 Number
 #   - Pool-size 512         => 4096 Number
 #   - Pool-size 1024        => 1024 Number
 #   - Pool-size 2048        => 512 Number
@@ -77,7 +77,7 @@ max:
 #   - Pool-size 1024*1024   => 8 Number
 #
 #    128:  65536
-#    256:  8192
+#    256:  16384
 #    512:  4096
 #    1024: 1024
 #    2048: 512
diff --git a/configs/open5gs/sgwc.yaml.in b/configs/open5gs/sgwc.yaml.in
index 11f771d4a..6fd3b8557 100644
--- a/configs/open5gs/sgwc.yaml.in
+++ b/configs/open5gs/sgwc.yaml.in
@@ -147,7 +147,7 @@ max:
 #   To connect more UEs, you need to increase the size further.
 #
 #   - Pool-size 128         => 65536 Number
-#   - Pool-size 256         => 8192 Number
+#   - Pool-size 256         => 16384 Number
 #   - Pool-size 512         => 4096 Number
 #   - Pool-size 1024        => 1024 Number
 #   - Pool-size 2048        => 512 Number
@@ -155,7 +155,7 @@ max:
 #   - Pool-size 1024*1024   => 8 Number
 #
 #    128:  65536
-#    256:  8192
+#    256:  16384
 #    512:  4096
 #    1024: 1024
 #    2048: 512
diff --git a/configs/open5gs/sgwu.yaml.in b/configs/open5gs/sgwu.yaml.in
index 12f8b1ca2..18e359c76 100644
--- a/configs/open5gs/sgwu.yaml.in
+++ b/configs/open5gs/sgwu.yaml.in
@@ -138,7 +138,7 @@ max:
 #   To connect more UEs, you need to increase the size further.
 #
 #   - Pool-size 128         => 65536 Number
-#   - Pool-size 256         => 8192 Number
+#   - Pool-size 256         => 16384 Number
 #   - Pool-size 512         => 4096 Number
 #   - Pool-size 1024        => 1024 Number
 #   - Pool-size 2048        => 512 Number
@@ -146,7 +146,7 @@ max:
 #   - Pool-size 1024*1024   => 8 Number
 #
 #    128:  65536
-#    256:  8192
+#    256:  16384
 #    512:  4096
 #    1024: 1024
 #    2048: 512
diff --git a/configs/open5gs/smf.yaml.in b/configs/open5gs/smf.yaml.in
index 618c9fffe..6c51748b7 100644
--- a/configs/open5gs/smf.yaml.in
+++ b/configs/open5gs/smf.yaml.in
@@ -317,7 +317,7 @@ max:
 #   To connect more UEs, you need to increase the size further.
 #
 #   - Pool-size 128         => 65536 Number
-#   - Pool-size 256         => 8192 Number
+#   - Pool-size 256         => 16384 Number
 #   - Pool-size 512         => 4096 Number
 #   - Pool-size 1024        => 1024 Number
 #   - Pool-size 2048        => 512 Number
@@ -325,7 +325,7 @@ max:
 #   - Pool-size 1024*1024   => 8 Number
 #
 #    128:  65536
-#    256:  8192
+#    256:  16384
 #    512:  4096
 #    1024: 1024
 #    2048: 512
diff --git a/configs/open5gs/udm.yaml.in b/configs/open5gs/udm.yaml.in
index 7a68aec37..e11db5f3e 100644
--- a/configs/open5gs/udm.yaml.in
+++ b/configs/open5gs/udm.yaml.in
@@ -140,7 +140,7 @@ max:
 #   To connect more UEs, you need to increase the size further.
 #
 #   - Pool-size 128         => 65536 Number
-#   - Pool-size 256         => 8192 Number
+#   - Pool-size 256         => 16384 Number
 #   - Pool-size 512         => 4096 Number
 #   - Pool-size 1024        => 1024 Number
 #   - Pool-size 2048        => 512 Number
@@ -148,7 +148,7 @@ max:
 #   - Pool-size 1024*1024   => 8 Number
 #
 #    128:  65536
-#    256:  8192
+#    256:  16384
 #    512:  4096
 #    1024: 1024
 #    2048: 512
diff --git a/configs/open5gs/udr.yaml.in b/configs/open5gs/udr.yaml.in
index f2a60a06a..fea395aba 100644
--- a/configs/open5gs/udr.yaml.in
+++ b/configs/open5gs/udr.yaml.in
@@ -142,7 +142,7 @@ max:
 #   To connect more UEs, you need to increase the size further.
 #
 #   - Pool-size 128         => 65536 Number
-#   - Pool-size 256         => 8192 Number
+#   - Pool-size 256         => 16384 Number
 #   - Pool-size 512         => 4096 Number
 #   - Pool-size 1024        => 1024 Number
 #   - Pool-size 2048        => 512 Number
@@ -150,7 +150,7 @@ max:
 #   - Pool-size 1024*1024   => 8 Number
 #
 #    128:  65536
-#    256:  8192
+#    256:  16384
 #    512:  4096
 #    1024: 1024
 #    2048: 512
diff --git a/configs/open5gs/upf.yaml.in b/configs/open5gs/upf.yaml.in
index 56f0b5424..bbd6554a3 100644
--- a/configs/open5gs/upf.yaml.in
+++ b/configs/open5gs/upf.yaml.in
@@ -223,7 +223,7 @@ max:
 #   To connect more UEs, you need to increase the size further.
 #
 #   - Pool-size 128         => 65536 Number
-#   - Pool-size 256         => 8192 Number
+#   - Pool-size 256         => 16384 Number
 #   - Pool-size 512         => 4096 Number
 #   - Pool-size 1024        => 1024 Number
 #   - Pool-size 2048        => 512 Number
@@ -231,7 +231,7 @@ max:
 #   - Pool-size 1024*1024   => 8 Number
 #
 #    128:  65536
-#    256:  8192
+#    256:  16384
 #    512:  4096
 #    1024: 1024
 #    2048: 512
diff --git a/lib/core/ogs-pkbuf.c b/lib/core/ogs-pkbuf.c
index a98c54ef8..8b23e2d67 100644
--- a/lib/core/ogs-pkbuf.c
+++ b/lib/core/ogs-pkbuf.c
@@ -93,7 +93,7 @@ void ogs_pkbuf_default_init(ogs_pkbuf_config_t *config)
     memset(config, 0, sizeof *config);
 
     config->cluster_128_pool = 65536;
-    config->cluster_256_pool = 8192;
+    config->cluster_256_pool = 16384;
     config->cluster_512_pool = 4096;
     config->cluster_1024_pool = 1024;
     config->cluster_2048_pool = 512;