2 files changed, 7 insertions, 2 deletions
diff --git a/docker/complement/conf/start_for_complement.sh b/docker/complement/conf/start_for_complement.sh
index 5560ab8b95..7b012ce8ab 100755
--- a/docker/complement/conf/start_for_complement.sh
+++ b/docker/complement/conf/start_for_complement.sh
@@ -68,6 +68,11 @@ if [[ -n "$SYNAPSE_COMPLEMENT_USE_WORKERS" ]]; then
 
   fi
   log "Workers requested: $SYNAPSE_WORKER_TYPES"
+  # adjust connection pool limits on worker mode as otherwise running lots of worker synapses
+  # can make docker unhappy (in GHA)
+  export POSTGRES_CP_MIN=1
+  export POSTGRES_CP_MAX=3
+  echo "using reduced connection pool limits for worker mode"
   # Improve startup times by using a launcher based on fork()
   export SYNAPSE_USE_EXPERIMENTAL_FORKING_LAUNCHER=1
 else
diff --git a/docker/conf/homeserver.yaml b/docker/conf/homeserver.yaml
index c46b955d63..c412ba2e87 100644
--- a/docker/conf/homeserver.yaml
+++ b/docker/conf/homeserver.yaml
@@ -67,8 +67,8 @@ database:
     host: "{{ POSTGRES_HOST or "db" }}"
     port: "{{ POSTGRES_PORT or "5432" }}"
 {% endif %}
-    cp_min: 5
-    cp_max: 10
+    cp_min: {{ POSTGRES_CP_MIN or 5 }}
+    cp_max: {{ POSTGRES_CP_MAX or 10 }}
 {% else %}
 database:
   name: "sqlite3"