[Postgres-xl-developers] Possible regression with recent GTM patches in XL9_5_STABLE

Tomas Vondra tomas.vondra at 2ndquadrant.com
Sun Oct 22 04:35:17 PDT 2017



On 10/21/2017 10:09 PM, Krzysztof Nienartowicz wrote:
> Hello Tomas,
> 
> We have experienced failed processing due to shared queue problems and
> segfaults under load with the latest two patches from 95 branch on
> queries that had run before without problems.
> 
> * Allocate thread-local snapshot array statically
> * Remember queryId for queries executed using FQS
> 
> We did not have time to analyze in detail but reverting patches fixes
> the problem (no idea which one could be a culprit..).
> Cores are available just in case.
> 

Damn. I don't quite see how the queryId could cause any failures, so I
assume it has to be the other patch.

Can you please share the backtraces from the core files?


regards

-- 
Tomas Vondra                  http://www.2ndQuadrant.com
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services


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