Yiqing Jin <yiqing(dot)jin(at)gmail(dot)com> writes:
> Yes it finished successfully after changing it to 50G!
OK. That's only a workaround of course. I believe the actual problem
is explained here:
http://www.postgresql.org/message-id/flat/25168(dot)1437091531(at)sss(dot)pgh(dot)pa(dot)us
If you need a fix before the next minor releases, see
http://git.postgresql.org/gitweb/?p=postgresql.git;a=commitdiff;h=b8f368276916b677f0678982e81723fe30e5c582
regards, tom lane