Horton

Re: Sync Rep v17

Simon Riggs <simon@2ndquadrant.com>

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From: Simon Riggs <simon@2ndQuadrant.com>
To: Daniel Farina <daniel@heroku.com>
Cc: Jaime Casanova <jaime@2ndquadrant.com>, Robert Haas <robertmhaas@gmail.com>, Heikki Linnakangas <heikki.linnakangas@enterprisedb.com>, pgsql-hackers@postgresql.org
Date: 2011-02-28T19:17:02Z
Lists: pgsql-hackers 
On Thu, 2011-02-24 at 18:13 -0800, Daniel Farina wrote:

> I have also reproduced this. Notably, things seem fine as long as
> pgbench is confined to one backend, but as soon as two are used (-c 2)
> by the feature I can get segfaults.

Sorry that you all experienced this. I wasn't able to get concurrent
queue accesses even with -c 8, so I spent about half a day last week
investigating a possible spinlock locking flaw. That meant the code in
that area was untested, which is most obvious now. I guess that means I
should test on different hardware in future.

-- 
 Simon Riggs           http://www.2ndQuadrant.com/books/
 PostgreSQL Development, 24x7 Support, Training and Services