2013/2/22 jackrg <jack(at)groundbreakingsoftware(dot)com>
> Tuning Postgre is not an option, as the instance
> is provided by Heroku and as far as I know cannot be tuned by me.
>
> Most tuning parameters can be set at per-query basis, so you can issue
alter database set param=value
to have same effect as if it was set through postgresql.conf.