There is another change of note in Linux 3.2 which could matter PostgreSQL, the major changes to how writebacks of dirty pages works.[1] Now in your case the ch

There is another change of note in Linux 3.2 which could matter PostgreSQL, the major changes to how writebacks of dirty pages works.[1] Now in your case the changes where mostly to read perfromance so I do not think the writeback changes mattered here. 1. http://kernelnewbies.org/Linux_3.2#head-fbc26b4522e4e990a9ea1aebd4a73a68e8ee5e07 http://kernelnewbies.org/Linux_3.2#head-fbc26b4522e4e990a9ea...