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Cleaning unused RPM packages
On a Fedora, Red Hat, CentOS, Mandriva, or RPM-based similar system, you may have installed some RPM software you don’t use. There are some easy ways to check. First, look through the biggest packages....
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Make SAS PROC SQL UPDATE faster with CALL EXECUTE
I have an ETL job that updates 10,000 rows in a large, remote Microsoft SQL table with 700,000 rows (1.4%). (The specific brand of remote SQL database doesn’t matter: this should work equally well for...
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Make SAS much faster with data set compression
R is fast at processing data sets, but it is limited by memory (physical RAM plus swap). SAS processes much larger data sets, but it is slow because it keeps the data sets on the hard drive. Although...
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Benchmarking R, Revolution R, and HyperThreading for data mining
Usually data mining benchmarks measure lift, precision, etc., but wasting analyst time hurts the ROI of any project. I recently upgraded my notebook (where I often use R for data mining) and was faced...
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Date and datetime: accuracy vs storage and I/O costs (SAS)
How much storage space and I/O resources can be saved by using the LENGTH statement to shrink the storage of date and datetimes while maintaining sufficient precision? In my experience, saving I/O...
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