Re: [BUGS] Segfault 11 on PG10 with max_parallel_workers_per_gather>3

On Wed, Oct 25, 2017 at 5:46 PM, Stefan Tzeggai
<tzeggai@empirica-systeme.de> wrote:

> "Finalize Aggregate  (cost=186411.37..186411.38 rows=1 width=8)"
> "  ->  Gather  (cost=186410.95..186411.36 rows=4 width=8)"
> "        Workers Planned: 4"
> "        ->  Partial Aggregate  (cost=185410.95..185410.96 rows=1 width=8)"
> "              ->  Parallel Bitmap Heap Scan on
> as_20171025_20170930_ut78777 rt  (cost=12058.69..185353.14 rows=23121
> width=0)"
> "                    Recheck Cond: (((oadr_gkz = ANY
>
('{2000000,5111000,5314000,5315000,5334002,5515000,6411000,6412000,7315000,8111000,8221000,9162000,9184119,11000000,14612000}'::integer[]))
> AND (objekttyp_grob = 1)) OR (oadr_gkz = 2000000))"
> "                    Filter: ((oart_zwangsversteigerung_janein IS NULL)
> AND (((oadr_gkz = ANY
>
('{2000000,5111000,5314000,5315000,5334002,5515000,6411000,6412000,7315000,8111000,8221000,9162000,9184119,11000000,14612000}'::integer[]))
> AND (objekttyp_grob = 1 (...)"
> "                    ->  BitmapOr  (cost=12058.69..12058.69 rows=94046
> width=0)"
> "                          ->  BitmapAnd  (cost=11726.20..11726.20
> rows=76321 width=0)"
> "                                ->  Bitmap Index Scan on


By looking at the plan it seems like the issue what got fixed in below commit.

Author: Robert Haas <rhaas@postgresql.org>  2017-10-14 00:23:28
Committer: Robert Haas <rhaas@postgresql.org>  2017-10-14 00:35:14
Parent: d48bf6a94d295c3779c6af4df118d95a6606192f (Fix AggGetAggref()
so it won't lie to aggregate final functions.)
Child:  cb591fcbfbba1df6fda1839ece53665e85e491e3 (Restore nodeAgg.c's
ability to check for improperly-nested aggregates.)
Branch: remotes/origin/REL_10_STABLE
Follows: REL_10_0
Precedes: REL_10_1
   Fix possible crash with Parallel Bitmap Heap Scan.
   If a Parallel Bitmap Heap scan's chain of leftmost descendents   includes a BitmapOr whose first child is a
BitmapAnd,the prior coding   would mistakenly create a non-shared TIDBitmap and then try to perform   shared
iteration.
   Report by Tomas Vondra.  Patch by Dilip Kumar.

-- 
Regards,
Dilip Kumar
EnterpriseDB: http://www.enterprisedb.com


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