bundles/postgresql: improvements

- support other postgresql versions
- manage configs using bw

bundles/postgresql/files/postgresql.conf

@@ -0,0 +1,30 @@
+data_directory = '/var/lib/postgresql/${version}/main'
+hba_file = '/etc/postgresql/${version}/main/pg_hba.conf'
+ident_file = '/etc/postgresql/${version}/main/pg_ident.conf'
+external_pid_file = '/var/run/postgresql/${version}-main.pid'
+% if version == '9.1':
+unix_socket_directory = '/var/run/postgresql'
+% else:
+unix_socket_directories = '/var/run/postgresql'
+% endif
+port = 5432
+listen_addresses = 'localhost'
+max_connections = ${max_connections}
+autovacuum_max_workers = ${autovacuum_max_workers}
+maintenance_work_mem = ${maintenance_work_mem}MB
+work_mem = ${work_mem}MB
+shared_buffers = ${shared_buffers}MB
+temp_buffers = ${temp_buffers}MB
+log_destination = syslog
+datestyle = 'iso, ymd'
+timezone = 'localtime'
+lc_messages = 'en_US.UTF-8'
+lc_monetary = 'en_US.UTF-8'
+lc_numeric = 'en_US.UTF-8'
+lc_time = 'en_US.UTF-8'
+default_text_search_config = 'pg_catalog.english'
+% if slow_query_log_sec > 0:
+log_min_duration_statement = ${slow_query_log_sec*1000}
+% else:
+log_min_duration_statement = -1
+% endif