Feature/postgres parameterisation

.gitignore

@@ -14,6 +14,8 @@ data
 docker-compose.override.yml
 tagpack-repos*.config
 
+postgres-conf.sql
+
 # Temporary and binary files
 *~
 *.py[cod]

README.md

@@ -135,16 +135,26 @@ Fetch and show concepts of a specific remote/local taxonomy (referenced by key:
 - [Docker][docker], see e.g. https://docs.docker.com/engine/install/
 - Docker Compose: https://docs.docker.com/compose/install/
 
-Setup and start a PostgreSQL instance. First, copy `docker/env.template`
+First, copy `docker/env.template`
 to `.env` and fill the fields `POSTGRES_PASSWORD` and `POSTGRES_PASSWORD_TAGSTORE`.
 
+Run
+
+    cp docker/postgres-conf.sql.template postgres-conf.sql
+
+and modify the configuration parameters to your requirements. If no special config is needed an emtpy file is also valid.
+
+    touch postgres-conf.sql
+
 Start a PostgreSQL instance using Docker Compose:
 
     docker-compose up -d
 
 This will automatically create the database schema as defined
 in `src/tagpack/db/tagstore_schema.sql`.
 
+
+
 #### Option 2: Use an existing PostgreSQL database
 
 Create the schema and tables in a PostgreSQL instance of your choice

docker-compose.yml

@@ -13,6 +13,7 @@ services:
     volumes:
       - "$LOCAL_DATA_DIR:/var/lib/postgresql/data"
       - ./src/tagpack/db/tagstore_schema.sql:/tmp/schema.sql
+      - ./postgres-conf.sql:/tmp/postgres-conf.sql
       - ./docker/init.sh:/docker-entrypoint-initdb.d/init.sh
     ports:
       - 5432:5432

docker/init.sh

@@ -1,5 +1,8 @@
 #!/bin/sh
 
+# apply custom settings
+psql -U "$POSTGRES_USER" -d "$POSTGRES_DB" -f /tmp/postgres-conf.sql
+
 # create schema
 psql -U "$POSTGRES_USER" -d "$POSTGRES_DB" -f /tmp/schema.sql
 # create user

docker/postgres-conf.sql.template

@@ -0,0 +1,3 @@
+-- ALTER SYSTEM SET shared_buffers = '2GB';
+-- ALTER SYSTEM SET wal_buffers = '16MB';
+-- ALTER SYSTEM SET max_parallel_workers = 20;