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Should I use my SSD drive for OS, for Data, or both? [closed]

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linux-howto

http://stackoverflow.com – I have a large Postgres database on Ubuntu 12 (+100GB). I have an old, SATA-based, spinning drive and a new SSD drive. I mainly do data analysis on Postgres (big, ugly select statements). I see a few options: SSD for data and OS. Spinning for temp space. SSD for data. Spinning for OS and temp space. SSD for OS. Spinning for data and temp space. I'm thinking that option #2 is the best. But, I wonder if moving the OS on the SSD will give me a boost. I'm not too concerned about boot up time or OS responsiveness as much as getting more speed out of my DB queries. (HowTos)