From my experience AS7 will consume less memory and CPU.
I recommend that you use a newer version as there are many fixes in the meanwhile.
Maybe it depends on your JVM heap settings, as it might be that the JVM grab the memory which is available before GC.
You might check the JVM settings for AS4 and AS7 and try it with the same Xmx and permgen settings if possible
thanks for the responce.
I tried using 7.2. But I'm getting more memorry occupied than 7.1.1. Could you suggest a ny version that i could try?
You might use a self build AS7.2.0.FInal or use the EAP6.1.0.Alpha if you need a community version for production.
How do you measure the memory consumption? The JVM might allocate more memory that it is actual used.
If you start the server without any application the AS7 should have a very small footprint.