Fix archival explosion

Author: proplex

ci/release_notes.md

@@ -0,0 +1,4 @@
+# Improvements
+ - Disabled archival of WAL, instead using `/bin/true`
+ - Bumped WAL segment retention to 128 segments
+ - Changed logging format for PostgreSQL logs

jobs/postgres/templates/config/postgresql.conf

@@ -1,6 +1,6 @@
 # postgres main configuration
 unix_socket_directories = '/var/vcap/sys/run/postgres/'
-log_line_prefix = '%t '
+log_line_prefix = '%m: proc=%p,user=%u,db=%d,host=%r '
 
 ##
 <%
@@ -21,9 +21,9 @@ log_line_prefix = '%t '
 
     config["wal_level"]         ||= 'hot_standby'
     config["max_wal_senders "]  ||= 5
-    config["wal_keep_segments"] ||= 32
+    config["wal_keep_segments"] ||= 128
     config["archive_mode"]      ||= 'on'
-    config["archive_command"]   ||= 'cp -i "%p" /var/vcap/store/postgres/db/archive/"%f" </dev/null'
+    config["archive_command"]   ||= '/bin/true'
     config["hot_standby"]       ||= 'on'
   end