Hallo Patric,

Kernel 3.2 is extremely bad for Postgresql, as the vm seems to amplify IO somehow. The difference to 3.13 (the latest LTS kernel for 12.04) is huge.


Interesting! To summarize it, 25% performance degradation from best kernel (2.6.32) to worst (3.2.0), that is indeed significant.

You might consider upgrading your kernel to 3.13 LTS. It's quite easy [...]

There are other stuff running on the hardware that I do not wish to touch, so upgrading the particular host is currently not an option, otherwise I would have switched to trusty.

Thanks for the pointer.


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