64 bit for a java developer

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http://forums.opensuse.org – I've been using opensuse 11.2 64 bit for a few month on lenovo T61 with 4GB ram, I'm a java developer and my main tools are Intellij idea, eclipse ,maven ,ant,firefox and chromium, tomcat and jetty. I noticed high memory consumption especially by Intellij ,firefox and chrome, chrome would sometime consume half the machine memory with 10-15 open tabs, in many cases I just had to shut it down in order to continue working. maven also requires me to increase its default memory or it crashes on out of memory errors. Intellij wouldn't work well with less then 1GB memory. now, I'm really (Distributions)