diff --git a/README.md b/README.md
index 1fba6c8..51cbdec 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,11 @@
 # prototype
 
 ![jitsi setup prototype](images/prototype.png)
+
+# metrics
+
+## network and memory usage of jitsi videobridge for online meetup at 2022-04-22 night
+
+![jitsi videobridge network usage](images/shlug_jitsi_2022_04_22_jvb_mem_and_network.png)
+
+peak client number is about 20~30, with screenshare(but not sure everyone view the screenshare).
diff --git a/images/shlug_jitsi_2022_04_22_jvb_mem_and_network.png b/images/shlug_jitsi_2022_04_22_jvb_mem_and_network.png
new file mode 100644
index 0000000..aadd062
Binary files /dev/null and b/images/shlug_jitsi_2022_04_22_jvb_mem_and_network.png differ