Back in February, Tom said here: http://archives.postgresql.org/pgsql-hackers/2008-02/msg00963.php :
That defeats a couple of optimizations that Simon put in recently. The one for no XLOG during COPY is not too hard to see how to re-enable, but I'm not sure what else there was.
Could someone please point me at where this optimization was committed? I'm having trouble locating it.
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