From: PG Bug reporting form <noreply@postgresql.org>
To: pgsql-bugs@lists.postgresql.org
Cc: nageshdbaa@gmail.com
Subject: BUG #19105: Parallel Hash Join crash when work_mem is small
Date: Sat, 08 Nov 2025 22:01:45 +0000
Message-ID: <19105-7516b55f7ed3a241@postgresql.org> (raw)
The following bug has been logged on the website:
Bug reference: 19105
Logged by: Nagesh Ka
Email address: nageshdbaa@gmail.com
PostgreSQL version: 16.2
Operating system: Ubuntu 22.04 x86_64
Description:
PostgreSQL version: 16.2 (Ubuntu 22.04 x86_64)
Compiled by gcc (Ubuntu 11.4.0)
work_mem = 1MB
max_parallel_workers_per_gather = 4
CREATE TABLE t1 AS SELECT i, md5(i::text) AS txt FROM
generate_series(1,1000000) i;
CREATE TABLE t2 AS SELECT i, md5(i::text) AS txt FROM
generate_series(1,1000000) i;
SET work_mem = '1MB';
SET max_parallel_workers_per_gather = 4;
SELECT t1.i, count(*)
FROM t1 JOIN t2 USING(i)
GROUP BY t1.i;
-->Expected Result
Query should complete successfully and return a count for each key.
-->Observed Result
Server terminates with:
ERROR: could not attach to dynamic shared area
DETAIL: invalid dsa_handle
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To: pgsql-bugs@postgresql.org
Cc: noreply@postgresql.org, pgsql-bugs@lists.postgresql.org, nageshdbaa@gmail.com
Subject: Re: BUG #19105: Parallel Hash Join crash when work_mem is small
In-Reply-To: <19105-7516b55f7ed3a241@postgresql.org>
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