diff --git a/Dockerfile b/Dockerfile
index 87f0229..eb7f98e 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -5,6 +5,7 @@ FROM ubuntu:18.04
 
 # Set up environment
 ENV TZ=UTC
+ENV AUTOVACUUM=on
 RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone
 
 # Install dependencies
@@ -132,9 +133,9 @@ RUN ln -sf /proc/1/fd/1 /var/log/apache2/access.log \
   && ln -sf /proc/1/fd/2 /var/log/apache2/error.log
 
 # Configure PosgtreSQL
-COPY postgresql.custom.conf /etc/postgresql/10/main/
+COPY postgresql.custom.conf.tmpl /etc/postgresql/10/main/
 RUN chown -R postgres:postgres /var/lib/postgresql \
-  && chown postgres:postgres /etc/postgresql/10/main/postgresql.custom.conf \
+  && chown postgres:postgres /etc/postgresql/10/main/postgresql.custom.conf.tmpl \
   && echo "\ninclude 'postgresql.custom.conf'" >> /etc/postgresql/10/main/postgresql.conf
 
 # Start running
diff --git a/README.md b/README.md
index 1f7e583..1ac61e1 100644
--- a/README.md
+++ b/README.md
@@ -31,10 +31,18 @@ Tiles that have already been rendered will be stored in `/var/lib/mod_tile`. To
 
 ## Performance tuning
 
+### THREADS
+
 The import and tile serving processes use 4 threads by default, but this number can be changed by setting the `THREADS` environment variable. For example:
 
     docker run -p 80:80 -e THREADS=24 -v openstreetmap-data:/var/lib/postgresql/10/main -d overv/openstreetmap-tile-server run
 
+### AUTOVACUUM
+
+The database use the autovacuum feature by default. This behavior can be changed with `AUTOVACUUM` environment variable. For example:
+
+    docker run -p 80:80 -e AUTOVACUUM=off -v openstreetmap-data:/var/lib/postgresql/10/main -d overv/openstreetmap-tile-server
+
 ## Troubleshooting
 
 ### ERROR: could not resize shared memory segment
diff --git a/postgresql.custom.conf b/postgresql.custom.conf.tmpl
similarity index 100%
rename from postgresql.custom.conf
rename to postgresql.custom.conf.tmpl
diff --git a/run.sh b/run.sh
index 97e2dbe..d7c0d01 100755
--- a/run.sh
+++ b/run.sh
@@ -1,5 +1,14 @@
 #!/bin/bash
 
+set -x
+
+function CreatePostgressqlConfig()
+{
+  cp /etc/postgresql/10/main/postgresql.custom.conf.tmpl /etc/postgresql/10/main/postgresql.custom.conf
+  sudo -u postgres echo "autovacuum = $AUTOVACUUM" >> /etc/postgresql/10/main/postgresql.custom.conf
+  cat /etc/postgresql/10/main/postgresql.custom.conf
+}
+
 if [ "$#" -ne 1 ]; then
     echo "usage: <import|run>"
     echo "commands:"
@@ -12,7 +21,7 @@ fi
 
 if [ "$1" = "import" ]; then
     # Initialize PostgreSQL
-    sudo -u postgres echo "autovacuum = off" >> /etc/postgresql/10/main/postgresql.custom.conf
+    CreatePostgressqlConfig
     service postgresql start
     sudo -u postgres createuser renderer
     sudo -u postgres createdb -E UTF8 -O renderer gis
@@ -36,6 +45,7 @@ fi
 
 if [ "$1" = "run" ]; then
     # Initialize PostgreSQL and Apache
+    CreatePostgressqlConfig
     service postgresql start
     service apache2 restart