diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -4,8 +4,10 @@
 
 # metrics
 
-## network and memory usage of jitsi videobridge for online meetup at 2022-04-22 night
+## resource 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)
+![jitsi videobridge network and memory usage](images/shlug_jitsi_2022_04_22_jvb_mem_and_network.png)
+
+![jitsi videobridge cpu usage](images/shlug_jitsi_2022_04_22_jvb_cpu.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_cpu.png b/images/shlug_jitsi_2022_04_22_jvb_cpu.png
new file mode 100644
index 0000000..f13f89b
Binary files /dev/null and b/images/shlug_jitsi_2022_04_22_jvb_cpu.png differ