Decrease idle time on pgpool

deploy/ansible/roles/postgresql/templates/pgpool.conf.j2

@@ -62,7 +62,7 @@ max_pool = 4
 
 # - Life time -
 
-child_life_time = 300
+child_life_time = {{ child_life_time }}
 # Pool exits after being idle for this many seconds
 child_max_connections = 0
 # Pool exits after receiving that many connections

deploy/ansible/roles/postgresql/vars/main.yml

@@ -6,3 +6,5 @@ memqcache_total_size_byte: 10737418240
 memqcache_maxcache_byte: 131072000
 # Has to be bigger or equal to maxcache_byte
 memqcache_cache_block_size_byte: 131072000
+# 20 seconds idle max (application shouldn't even make idle connections)
+child_life_time: 20