On 2016-05-23 17:19:09 +0800, Craig Ringer wrote:
> Hi all
> Following on from the foreign table batch inserts thread[1], here's a patch
> to add support for pipelining queries into asynchronous batches in libpq.


> I'm measuring 300x (not %) performance improvements doing batches on
> servers over the Internet, so this seems pretty worthwhile. It turned out
> to be way less invasive than I expected too.


> (I intentionally didn't add any way for clients to annotate each work-item
> in a batch with their own private data. I think that'd be really useful and
> would make implementing clients easier, but should be a separate patch).
> This should be very useful for optimising FDWs, Postgres-XC, etc.

And optimizing normal clients.

Not easy, but I'd be very curious how much psql's performance improves
when replaying a .sql style dump, and replaying from a !tty fd, after
hacking it up to use the batch API.

- Andres

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