问题
PostgreSQL 9.4
In the article about hardware optimization for PostgreSQL server was shown that too much moving disk head may cause performance bottleneck. As far as I got, for the sequential scan, it'd be much faster if the cylinders with blocks of the same table are located as close as possible. So, if we're inserting data into a table, the data will be placed in "sequential order" on a disk-storage, therefore reducing the disk head moving overhead.
But I presume that such location may be break in time. Is there a way for postgreSQL to maintain such "clustering" (if I can say so)?
来源：https://stackoverflow.com/questions/32943211/optimizing-sequential-scan-in-postgresql