Re: making write location work (was: Efficient transaction-controlled synchronous replication)

Robert Haas  writes:
> Specifically, if we're not going to remove write location, then I
> think we need to apply something like the attached.

>  			while (walrcv_receive(0, &type, &buf, &len))
>  				XLogWalRcvProcessMsg(type, buf, len);
> +			/* Let the master know that we received some data. */
> +			XLogWalRcvSendReply();

What if we didn't actually receive any new data?
		regards, tom lane