On Wed, Jan 25, 2012 at 8:16 AM, Fujii Masao <masao(dot)fujii(at)gmail(dot)com> wrote:
>> What happens if we shutdown the WALwriter and then issue SIGHUP?
> SIGHUP doesn't affect full_page_writes in that case. Oh, you are concerned about
> the case where smart shutdown kills walwriter but some backends are
> still running?
> Currently SIGHUP affects full_page_writes and running backends use the changed
> new value of full_page_writes. But in the patch, SIGHUP doesn't affect...
> To address the problem, we should either postpone the shutdown of walwriter
> until all backends have gone away, or leave the update of full_page_writes to
> checkpointer process instead of walwriter. Thought?
checkpointer seems the correct place to me
Simon Riggs http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services
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