From dc19e644a6ca95458931b616e1461c6f1e811339 Mon Sep 17 00:00:00 2001
From: Athanasios Voutsadakis
 <athanasios.voutsadakis@digital.cabinet-office.gov.uk>
Date: Wed, 21 Feb 2018 15:44:03 +0000
Subject: [PATCH] Increase DB connection pool size to 10

This is to address some errors we saw yesterday such as:

`sqlalchemy.exc.TimeoutError: QueuePool limit of size 5 overflow 10
reached, connection timed out, timeout 30`

Related flask-sqlalchemy docs:
http://flask-sqlalchemy.pocoo.org/2.3/config/#configuration-keys
---
 app/config.py         | 1 +
 manifest-api-base.yml | 1 +
 2 files changed, 2 insertions(+)

diff --git a/app/config.py b/app/config.py
index 3cbe9130c..ab999945f 100644
--- a/app/config.py
+++ b/app/config.py
@@ -127,6 +127,7 @@ class Config(object):
     SQLALCHEMY_COMMIT_ON_TEARDOWN = False
     SQLALCHEMY_RECORD_QUERIES = True
     SQLALCHEMY_TRACK_MODIFICATIONS = True
+    SQLALCHEMY_POOL_SIZE = os.environ.get('SQLALCHEMY_POOL_SIZE', 5)
     SQLALCHEMY_POOL_TIMEOUT = 30
     SQLALCHEMY_POOL_RECYCLE = 300
     PAGE_SIZE = 50
diff --git a/manifest-api-base.yml b/manifest-api-base.yml
index 025459ef3..e8197575f 100644
--- a/manifest-api-base.yml
+++ b/manifest-api-base.yml
@@ -9,6 +9,7 @@ env:
   CW_APP_NAME: api
   # required by cf run-task
   FLASK_APP: application.py
+  SQLALCHEMY_POOL_SIZE: 10
 
   # Credentials variables
   ADMIN_BASE_URL: null