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Java, MySql increased performance with Huge Pages

[Resources updates: 2010.07.07 , 2009.11.03 , 2009.05.27 ] Long running, large memory, high performant applications often have special needs with respect to their memory management. On Linux, Solaris and other modern OSes, the translation look-aside buffer ( TLB ) - whose page size of 4k for many CPUs/OSes - becomes a scalability issue in these extreme conditions. In order to get around TLB scalability issues, huge page sizes are used to reduce the impact on performance. This can be of use to installations with large scale Java, MySql and other large memory applications. 300% improvement : " Well, in my case, I was able to achieve an over 3x improvement in my EJB 3 application, of which fully 60 to 70% of that was due to using large page memory with a 3.5GB heap. Now, a 3.5GB heap without the large memory pages didn't provide any benefit over smaller heaps without large pages. Besides the throughput improvements, I also noticed that GC frequency was cut down by two-third...
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Postscript coding resources

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Postscript is one of my favourite programming languages. Resources for postscript programming are not too common, and are always popping up and then disappearing, as things tend to do on the Web. Here is a snapshot of links that work: I will do my best to keep them up-to-date.
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Hadoop + EC2 + S3 = Super alternatives for researchers (& real people too!)

I recently discovered and have been inspired by a real-world and non-trivial (in space and in time) application of Hadoop (Open Source implementation of Google's MapReduce ) combined with the Amazon Simple Storage Service ( Amazon S3 ) and the Amazon Elastic Compute Cloud ( Amazon EC2 ). The project was to convert pre-1922 New York Times articles-as-scanned-TIFF-images into PDFs of the articles: Recipe: 4 TB of data loaded to S3 (TIFF images) + Hadoop (+ Java Advanced Imaging and various glue) + 100 EC2 instances + 24 hours = 11 million PDFs , 1.5 TB on S3 Unfortunately, the developer ( Derek Gottfrid ) did not say how much this cost the NYT. But here is my back-of-the-envelope calculation (using the Amazon S3/EC2 FAQ ): EC2: $0.10 per instance-hour x 100 instances x 24hrs = $240 S3 : $0.15 per GB-Month x 4500 GB x ~1.5/31 months = ~$33 + $0.10 per GB of data transferred in x 4000 GB = $400 + $0.13 per GB of data transferred out x 1500 GB = $195 Total: = ~$868 Not unre...
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