Takahiro Itagaki <itagaki.takahiro@oss.ntt.co.jp> writes:
> I found pgbench sometimes receives responces of "UPDATE 0" from HEAD server.
> When I re-tested pgbench with 8.4.2 server, all of the results were "UPDATE 1".
> Are there known issues in HEAD for concurrent updates?
There are now :-(. I've committed a fix that I think takes care of
this, but since it seems to be a quite hard-to-reach path of control,
please test some more.
regards, tom lane