As of now, main table that stores explain.depesz.com plans is partitioned.

This shouldn't be, at all, visible for users of the site, but if it would, please let me know (on irc, or via email).

In case you're wondering why, after all there is only ~ 270,000 plans – the reason is very simple. Splitting the data into multiple tables makes maintenance tasks (vacuum, dump) much simpler and easier.