diff --git a/README.md b/README.md
index 70f1944..dba1ce3 100644
--- a/README.md
+++ b/README.md
@@ -338,6 +338,15 @@ Create a dockerized d2-docker:
 $ bash build-docker-container.sh
 ```
 
+## Debug SQL queries
+
+By default, d2-docker logs all SQL queries executed (one file per weekday). Example:
+
+```
+$ db_container="d2-docker-docker-eyeseetea-com-samaritans-40-4-0-sp-cpr-test-db-1"
+$ docker exec -it "$db_container" tail -f /var/lib/postgresql/data/log/queries-Thu.log
+```
+
 ### API Server
 
 Start Flask server in development mode:
diff --git a/src/d2_docker/commands/start.py b/src/d2_docker/commands/start.py
index 8c899e9..2ff59f4 100644
--- a/src/d2_docker/commands/start.py
+++ b/src/d2_docker/commands/start.py
@@ -39,6 +39,8 @@ def setup(parser):
     parser.add_argument("--deploy-path", type=str, help="Set Tomcat context.path")
     parser.add_argument("--java-opts", type=str, help="Set Tomcat JAVA_OPTS")
     parser.add_argument("--postgis-version", type=str, help="Set PostGIS database version")
+    parser.add_argument("--enable-postgres-queries-logging", action="store_true",
+                        help="Enable Postgres queries logging")
 
 
 def run(args):
@@ -110,6 +112,7 @@ def start(args):
             dhis_conf=args.dhis_conf,
             java_opts=args.java_opts,
             postgis_version=args.postgis_version,
+            enable_postgres_queries_logging=args.enable_postgres_queries_logging,
         )
 
     if args.detach:
diff --git a/src/d2_docker/docker-compose.yml b/src/d2_docker/docker-compose.yml
index 9f74c06..2cbc68e 100644
--- a/src/d2_docker/docker-compose.yml
+++ b/src/d2_docker/docker-compose.yml
@@ -41,7 +41,7 @@ services:
             POSTGRES_DB: dhis2
             POSTGRES_USER: dhis
             POSTGRES_PASSWORD: dhis
-        command: "postgres -c max_locks_per_transaction=100 -c max_connections=250 -c shared_buffers=3200MB -c work_mem=24MB -c maintenance_work_mem=1024MB -c effective_cache_size=8000MB -c checkpoint_completion_target=0.8 -c synchronous_commit=off -c wal_writer_delay=10000ms -c random_page_cost=1.1 -c max_locks_per_transaction=100 -c temp_buffers=16MB -c track_activity_query_size=8192 -c jit=off"
+        command: "postgres -c max_locks_per_transaction=100 -c max_connections=250 -c shared_buffers=3200MB -c work_mem=24MB -c maintenance_work_mem=1024MB -c effective_cache_size=8000MB -c checkpoint_completion_target=0.8 -c synchronous_commit=off -c wal_writer_delay=10000ms -c random_page_cost=1.1 -c max_locks_per_transaction=100 -c temp_buffers=16MB -c track_activity_query_size=8192 -c jit=off ${PSQL_ENABLE_QUERY_LOGS--c logging_collector=on -c log_statement=all -c log_filename=queries-%a.log}"
         restart: unless-stopped
         ports:
             - "${DB_PORT}"
diff --git a/src/d2_docker/utils.py b/src/d2_docker/utils.py
index 5c3558e..8d65fb9 100644
--- a/src/d2_docker/utils.py
+++ b/src/d2_docker/utils.py
@@ -260,6 +260,7 @@ def run_docker_compose(
     dhis2_auth=None,
     tomcat_server=None,
     postgis_version=None,
+    enable_postgres_queries_logging=False,
     **kwargs,
 ):
     """
@@ -294,6 +295,7 @@ def run_docker_compose(
         ("DB_PORT", ("{}:5432".format(db_port) if db_port else "0:1000")),
         # Add ROOT_PATH from environment (required when run inside a docker)
         ("ROOT_PATH", ROOT_PATH),
+        ("PSQL_ENABLE_QUERY_LOGS", "") if not enable_postgres_queries_logging else None,
     ]
     env = dict((k, v) for (k, v) in [pair for pair in env_pairs if pair] if v is not None)