Advanced read/write workload

README.md

@@ -24,7 +24,7 @@ pip install -r requirements/production.txt
 gunicorn \
     --env=DJANGO_SETTINGS_MODULE=bakerydemo.settings.production \
     --env=DJANGO_SECRET_KEY=demo \
-    --workers=1 \
+    --workers=4 \
     bakerydemo.wsgi:application
 ```
 
@@ -35,7 +35,7 @@ uwsgi \
     --env=DJANGO_SETTINGS_MODULE=bakerydemo.settings.production \
     --env=DJANGO_SECRET_KEY=demo \
     --http-socket=127.0.0.1:8000 \
-    --workers=1 \
+    --workers=4 \
     --module=bakerydemo.wsgi
 ```
 
@@ -46,5 +46,5 @@ locust \
     --headless \
     --host http://127.0.0.1:8000 \
     --run-time 1m \
-    --users 1
+    --users 4
 ```

bakerydemo/settings/production.py

@@ -43,6 +43,9 @@
 # Enable persistent connections
 DATABASES["default"]["CONN_MAX_AGE"] = 60
 
+# Tweaked sqlite3 backend to avoid locked database errors
+DATABASES["default"]["ENGINE"] = "bakerydemo.sqlite3"
+
 # AWS creds may be used for S3 and/or Elasticsearch
 AWS_ACCESS_KEY_ID = os.getenv("AWS_ACCESS_KEY_ID", "")
 AWS_SECRET_ACCESS_KEY = os.getenv("AWS_SECRET_ACCESS_KEY", "")

bakerydemo/sqlite3/base.py

@@ -0,0 +1,7 @@
+from django.db.backends.sqlite3 import base
+
+
+class DatabaseWrapper(base.DatabaseWrapper):
+    def _start_transaction_under_autocommit(self):
+        # Acquire a write lock immediately for transactions
+        self.cursor().execute("BEGIN IMMEDIATE")

locustfile.py

@@ -53,7 +53,7 @@ def view_page(self):
 
 
 class WagtailEditor(BaseWagtailUser):
-    fixed_count = 1
+    fixed_count = 2
 
     @task
     def edit_page(self):