From 10422dc37bb3ce7494fe42f8d932c21e546df520 Mon Sep 17 00:00:00 2001
From: Oliver <oliver.henry.walters@gmail.com>
Date: Sun, 20 Sep 2026 19:09:55 +1000
Subject: [PATCH] [db] Disable JIT for postgres (#12893)

* disable postgres JIT by default

* Update docs
---
 docs/docs/start/config.md                           |  4 ++++
 .../InvenTree/InvenTree/setting/db_backend.py       | 13 +++++++++++++
 2 files changed, 17 insertions(+)

diff --git a/docs/docs/start/config.md b/docs/docs/start/config.md
index fd40a4bde9..f71cb3cd1d 100644
--- a/docs/docs/start/config.md
+++ b/docs/docs/start/config.md
@@ -280,6 +280,10 @@ If running with a PostgreSQL database backend, the following additional options
 | `INVENTREE_DB_TCP_KEEPALIVES_COUNT` | database.tcp_keepalives_count | 5 | TCP keepalive count |
 | `INVENTREE_DB_TCP_USER_TIMEOUT` | database.tcp_user_timeout | 2000 | TCP user timeout (ms) |
 | `INVENTREE_DB_ISOLATION_SERIALIZABLE` | database.serializable | False | Database isolation level configured to "serializable" |
+| `INVENTREE_DB_JIT_ENABLED` | database.jit_enabled | False | Enable JIT compilation for PostgreSQL queries |
+
+!!! info "JIT Compilation"
+    PostgreSQL supports [JIT compilation](https://www.postgresql.org/docs/current/jit.html) for queries. This is disabled by default, as it can cause performance issues for small queries.
 
 ### MySQL Settings
 
diff --git a/src/backend/InvenTree/InvenTree/setting/db_backend.py b/src/backend/InvenTree/InvenTree/setting/db_backend.py
index 6defd52374..7d169bd59e 100644
--- a/src/backend/InvenTree/InvenTree/setting/db_backend.py
+++ b/src/backend/InvenTree/InvenTree/setting/db_backend.py
@@ -208,6 +208,19 @@ def set_postgres_options(db_options: dict):
             'inventree-worker' if isInWorkerThread() else 'inventree-server'
         )
 
+    extra_options = []
+
+    if 'options' in db_options:
+        extra_options.append(db_options['options'])
+
+    if not get_boolean_setting(
+        'INVENTREE_DB_JIT_ENABLED', 'database.jit_enabled', False
+    ):
+        extra_options.append('-c jit=off')
+
+    if extra_options:
+        db_options['options'] = ' '.join(extra_options)
+
 
 def set_mysql_options(db_options: dict):
     """Set database options specific to mysql backend."""