The following review has been posted through the commitfest application:
make installcheck-world: tested, passed
Implements feature: tested, passed
Spec compliant: not tested
Documentation: not tested
Hello,
I have used following scenario to trigger "no unpinned buffers available":
1. set following parameters in postgresql.conf:
shared_buffers = 128kB
log_error_verbosity = verbose
2. stop and restart PG server
3. use pgbench:
pgbench -i -s 10 postgres
dropping old tables...
creating tables...
generating data (client-side)...
vacuuming...
creating primary keys...
done in 8.98 s (drop tables 0.01 s, create tables 0.02 s, client-side generate
8.14 s, vacuum 0.31 s, primary keys 0.50 s).
$ pgbench -c 16 -j 16 -T 60 postgres
pgbench (20devel)
starting vacuum...end.
pgbench: error: pgbench: error: pgbench:client 8 script 0 aborted in command 5
query 0: ERROR: no unpinned buffers available
pgbench:pgbench:client 5 script 0 aborted in command 5 query 0: ERROR: no
unpinned buffers available
pgbench: error: error: client 4 script 0 aborted in command 5 query 0: ERROR:
no unpinned buffers available
error: client 7 script 0 aborted in command 5 query 0: ERROR: no unpinned
buffers available
I have checked PG log:
grep 53000 $PGDATA/log/pg.log
2026-09-26 13:23:28.504 CEST [66095] ERROR: 53000: no unpinned buffers
available
2026-09-26 13:23:28.504 CEST [66102] ERROR: 53000: no unpinned buffers
available
2026-09-26 13:23:28.504 CEST [66089] ERROR: 53000: no unpinned buffers
available
2026-09-26 13:23:28.504 CEST [66103] ERROR: 53000: no unpinned buffers
available
2026-09-26 13:23:28.504 CEST [66094] ERROR: 53000: no unpinned buffers
available
2026-09-26 13:23:28.504 CEST [66092] ERROR: 53000: no unpinned buffers
available
2026-09-26 13:23:28.504 CEST [66088] ERROR: 53000: no unpinned buffers
available
2026-09-26 13:23:28.504 CEST [66098] ERROR: 53000: no unpinned buffers
available
2026-09-26 13:23:28.505 CEST [66091] ERROR: 53000: no unpinned buffers
available
We have expected PG error code class:
Class 53 — Insufficient Resources
Patch looks good to me.
Regards,
PF.
The new status of this patch is: Ready for Committer
