Florian Weimer wrote:

> After an upgrade to 7.4.1 (from 7.3) we see a severe performance
> regression in bulk INSERTs.

In turns out that we were running the default configuration, and not the
tuned one in /etc/postgresql. *blush*

After increasing the number of checkpoint segments and the shared-memory
buffers, performance is back to the expected levels.  It might even be a
bit faster.

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