Update cpu interval doc

Author: MathieuCesbron

README.md

@@ -138,7 +138,7 @@ If we have a container named `nginx` in our pod, the variable name should be `NG
 | \<CONTAINER NAME>\_CPU_MAX_INC | 0.5 | Maximum CPU increase for one correction. e.g. 0.5 is a 50% increase. |
 | \<CONTAINER NAME>\_CPU_MAX_DEC | 0.1 | Maximum CPU decrease for one correction. e.g. 0.1 is a 10% decrease. |
 | \<CONTAINER NAME>\_CPU_TARGET_AVG | 0.8 | Target CPU average for the container. It is from 0 to 1. e.g. 0.8 means a target cpu usage of 80%. |
-| \<CONTAINER NAME>\_CPU_INTERVAL | 6 | Target CPU average for the container. It is from 0 to 1. e.g. 0.8 means a target cpu usage of 80%. |
+| \<CONTAINER NAME>\_CPU_INTERVAL | 6 | CPU interval in seconds to calculate the CPU average. Each interval last 1 second.|
 | \<CONTAINER NAME>\_CPU_COEFF | 6 | Used to calculate the new cpu limit when a cpu increase is needed. The higher the coeff, the higher the new cpu limit. |
 
 ### More

doc/cpu.md

@@ -2,7 +2,7 @@
 Kondense resize each container CPU every second with the following steps.
 
 ## 1. Calculate average CPU usage
-Kondense calculate the average CPU usage over the last `INTERVAL` seconds. By default, `INTERVAL` is 10 seconds.
+Kondense calculate the average CPU usage over the last `INTERVAL` seconds. By default, `INTERVAL` is 6 seconds.
 
 ### 2. Calculate new CPU
 We need the `TARGET_AVG` to calculate the new CPU. By default, `TARGET_AVG` is 0.8 so 80%.