Re: weird hang while running in HS mode

On Thu, 2010-05-13 at 19:32 +0900, Fujii Masao wrote:
> On Thu, May 13, 2010 at 7:22 PM, Simon Riggs <simon@2ndquadrant.com> wrote:
> > On Thu, 2010-05-13 at 19:08 +0900, Fujii Masao wrote:
> >
> >> I was able to reproduce such a hang by not executing another
> >> transaction after rollback. In this case, walsender cannot replicate
> >> the rollback since it's not in the disk.
> >
> > WALWriter is not active?
> 
> WALWriter is active, but unfortunately it doesn't flush all of the WAL
> records in wal_buffers. Please see XLogBackgroundFlush().

Yes, I wrote it. It flushes after at most 3 cycles, stated in comments.

-- Simon Riggs           www.2ndQuadrant.com