PostgreSQL configuration tuning to improve tests performance of database interactions.

postgresql.conf

# PostgreSQL configuration tuning to improve tests performance of database interactions.
# Look for more detailed description in follow articles:
# - http://rhaas.blogspot.com/2010/06/postgresql-as-in-memory-only-database_24.html
#
# ATTENTION: 
#   Before appling those settings ensure that you have no important data in your cluster, because those settings
#   could cause problems on your production database in case of appliance.
#
# Ensure follow settings have given values.

# See more detailed description for the option in Postgres documentation at
# http://www.postgresql.org/docs/9.1/static/runtime-config-wal.html in "18.5. Write Ahead Log" section.
fsync=off
synchronous_commit=off
full_page_writes=off

# See more detailed description for the option in Postgres documentation at
# http://www.postgresql.org/docs/9.1/static/runtime-config-resource.html in "18.4.4. Background Writer" section.
bgwriter_lru_maxpages=0