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toolset: Tune the AIO parameters for PostgreSQL 18 #10378

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Merged
msmith-techempower merged 1 commit into from
Dec 11, 2025
+15 −5
Merged

toolset: Tune the AIO parameters for PostgreSQL 18 #10378

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9 changes: 8 additions & 1 deletion toolset/databases/postgres/config.sh
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Expand Up @@ -2,4 +2,11 @@

set -e

cat /tmp/postgresql.conf >> "${PGDATA}/postgresql.conf"
cat /docker-entrypoint-initdb.d/postgresql.conf >> "${PGDATA}/postgresql.conf"

IO_WORKERS="$(( (`nproc` + 3) / 4 ))"

# The maximum valid value for the io_workers configuration parameter is 32.
if [[ "$IO_WORKERS" -lt 32 ]]; then
sed -i "s/io_workers = 32/io_workers = ${IO_WORKERS}/" "${PGDATA}/postgresql.conf"
fi
6 changes: 2 additions & 4 deletions toolset/databases/postgres/postgres.dockerfile
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@@ -1,10 +1,8 @@
FROM postgres:18-trixie

ENV PGDATA=/ssd/postgresql \
POSTGRES_DB=hello_world \
ENV POSTGRES_DB=hello_world \
POSTGRES_PASSWORD=benchmarkdbpass \
POSTGRES_USER=benchmarkdbuser

COPY 60-postgresql-shm.conf /etc/sysctl.d/
COPY config.sh create-postgres.sql /docker-entrypoint-initdb.d/
COPY postgresql.conf /tmp/
COPY config.sh create-postgres.sql postgresql.conf /docker-entrypoint-initdb.d/
5 changes: 5 additions & 0 deletions toolset/databases/postgres/postgresql.conf
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Expand Up @@ -5,6 +5,11 @@ listen_addresses = '*'
max_connections = 2000
ssl = false

# Tuning AIO in PostgreSQL 18:
# https://vondra.me/posts/tuning-aio-in-postgresql-18
# The config.sh script sets the actual value based on that article and the runtime environment.
io_workers = 32

# values from: http://blog.pgaddict.com/posts/performance-since-postgresql-7-4-to-9-4-pgbench
# details: http://www.postgresql.org/docs/9.4/static/runtime-config-resource.html
# http://www.postgresql.org/docs/9.4/static/runtime-config-wal.html
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