Thread: DSA refcnt overflow in pg_stat/could not attach to dynamic shared area
Our issue is very similar to this https://www.postgresql.org/message-id/ZnuprZeVZd2X_MOD%40paquier.xyz
Could you confirm which PostgreSQL 15.x minor version includes the fix for this issue? We rely on RPM packages and are unable to apply manual patches. Looking forward to your reply. Thank you!"
1. PostgreSQL 版本: 15.6
2. OS: RHEL8.10
3. ERROR LOGS:
2025-04-24 03:41:32 55000: could not attach to dynamic shared area
2025-04-24 03:41:32client=LOCATION: attach_internal, dsa.c:1334
2025-04-24 03:41:32client=LOG: 00000: background worker "parallel worker" (PID 3936459) exited with exit code 1
2025-04-24 03:41:32client=LOCATION: LogChildExit, postmaster.c:3747
2025-04-24 03:41:32ERROR: 55000: parallel worker failed to initialize
2025-04-24 03:41:32HINT: More details may be available in the server log.
2025-04-24 03:41:32 WaitForParallelWorkersToFinish, parallel.c:838
2025-04-24 03:41:32 STATEMENT: select t.id,t.bar_code,t.request_id,t.host_ip,t.resv2,
to_char(t.start_time,'yyyymmddhh24miss') as start_time,to_char(t.end_time,'yyyymmddhh24miss') as end_time,
t.equipment_type,t.machine_id,t.control_machine_id,t.station,t.code_type,t.fixture_id,t.cavity,t.line,
t.sw_name,t.sw_version,t.product_no,t.phase_no,t.bill_no,t.config,t.server_node,t.source,t.test_result,
t.cost_time,t.process_rev,t.station_no,t.station_str,
t.client_code,t.is_recheck,t.check_user,to_char(t.indate,'yyyymmddhh24miss.us') as indate,s.para_info,
t.vendor_id,t.draw_name,t.draw_version,to_char(t.calibration_date,'yyyymmddhh24miss') as cali_date
from aaaa t left join bbbbbbb s on s.id = t.id where t.indate > to_timestamp($1,'yyyymmddhh24miss.us')
and t.indate< CLOCK_TIMESTAMP() - interval '5 minute' order by t.indate asc limit 3000
5. parameters:
server total memory ：512GB
CPU:96 cores
shared_buffers = 128GB
max_connections = 3000
worm_mem = 8M
max_worker_processes = 400
max_parallel_workers_per_gather = 2
max_parallel_maintenance_workers = 2
max_parallel_workers = 64
Re: DSA refcnt overflow in pg_stat/could not attach to dynamic shared area
From
Michael Paquier
Date:
On Thu, Apr 24, 2025 at 02:04:59PM +0800, 李园园 wrote: > Our issue is very similar to this https://www.postgresql.org/message-id/ZnuprZeVZd2X_MOD%40paquier.xyz > Could you confirm which PostgreSQL 15.x minor version includes the > fix for this issue? We rely on RPM packages and are unable to apply > manual patches. Looking forward to your reply. Thank you!" > > > 1. PostgreSQL 版本: 15.6 > 2. OS: RHEL8.10 > 3. ERROR LOGS: > 2025-04-24 03:41:32 55000: could not attach to dynamic shared area Yes, that looks like the same issue. 15.6 has been released in February 2024, and the fix on REL_15_STABLE is eb144dfcafdd, meaning that it would be in at least 15.8. -- Michael