On Wed, Aug 24, 2016 at 11:44 AM, Mark Kirkwood
<mark.kirkwood@catalyst.net.nz> wrote:
> On 24/08/16 17:01, Mark Kirkwood wrote:
>>
>>
>> ...actually I was wrong there, only 2 of them were the same. So I've
>> attached a new log of bt's of them all.
>>
>>
>>
>
> And I can reproduce with only 1 session, figured that might be a helpful
> piece of the puzzle (trace attached).
>
Thanks.
I think I know the problem here. Basically _hash_freeovflpage() is
trying to take a lock on a buffer previous to overflow page to update
the links and it is quite possible that the same buffer is already
locked for moving the tuples while squeezing the bucket. I am working
on a fix for the same.
Coincidently, Ashutosh Sharma a colleague of mine who was also testing
this patch found the same issue by an attached sql script. So we
might be able to inculcate a test case in the regression suite as
well after fix.
--
With Regards,
Amit Kapila.
EnterpriseDB: http://www.enterprisedb.com
