I have been pulling my hair out at the JBoss error:

java.lang.OutOfMemoryError: PermGen space

when trying to start JBoss. It starts fine with one of my ear files, but when I added the second ear file it loads, but on access of any page in JBoss it crashed. After two hours of this, I finally figured it out.

here....

Firstly, trying to run telnet on any modern Windows 2008 server will cause severe distress to say the least. Why? Because Microsoft deemed that useful little command unnecessary to be installed by default. Anyway... So you go to Programs and Features and add the Telnet Client feature.

To my mind Telnet Client is a very, very small executable. It cannot possibly have large DLL dependencies. So it was much to my dismay and horror when I realised installing this took over 4 minutes on a modern server. So much for progress...

I just received a business case document that is in Final Draft. Either my client is very confident I will not find fault in this document, or... Hmmm.

If you are also frustrated by the fact that by default, Parallels will only write the RAM image to disk at 20MB/s even on a fast internal drive, then fear not.

Go to Virtual Machine > Configure > Hardware > Boot Order and add this to the Bootflags:

vm.mem_flush_limit=0
vm.mem_anonymous=1