Excellent. I'll take a look at this and report back here. Ross On Mon, Feb 23, 2009 at 04:17:00PM -0500, Tom Lane wrote: > "Ross J. Reedstrom" <reedstrm@xxxxxxxx> writes: > > Summary: C client and large-object API python both send bits in > > reasonable time, but I suspect there's still room for improvement in > > libpq over TCP: I'm suspicious of the 6x difference. Detailed analysis > > will probably find it's all down to memory allocation and extra copying > > of bits around (client side) > > I wonder if the backend isn't contributing to the problem too. It chops > its sends up into 8K units, which doesn't seem to create huge overhead > in my environment but maybe it does in yours. It'd be interesting to see > what results you get from the attached quick-and-dirty patch (against > HEAD, but it should apply back to at least 8.1). > > regards, tom lane -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
