Vacuuming and analyzing is the process that removes dead rows and also updates the statistics of a table.
As of PostgreSQL 8.3, auto vacuuming (the process that runs around cleaning up tables), is on by default. If you are
creating a lot of tables and bulk loading data, the vacuumer sometimes gets in your way. One way to get around that is to
disable auto vacuuming on the tables you are currently working on and then reenable afterward.
You can also do this from the PgAdmin III management console.
In our prior story about allocating people with the power of window aggregation, we saw our valiant hero and heroine trying
to sort people into elevators
to ensure that each elevator ride was not over capacity. All was good in the world until someone named Frank came along and spoiled the party.
Frank rightfully pointed out that our algorithm was flawed because should Charlie double his weight, then we could have one elevator ride over capacity.
We have a plan.