Tuning the PostgreSQL Database

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Tuning of postgres is done via the postgresql.conf file.

Settings based on available RAM

shared_buffers=1/4 of the available memory effective_cache_size = 1/2 of available memory

Standard Settings

autovacuum_max_workers = 1
checkpoint_completion_target = 0.9
checkpoint_segments = 32
log_min_duration_statement = 5000
synchronous_commit = off 
work_mem = 4MB
wal_buffers= 10MB
commit_delay 10
max_locks_per_transaction=3000
work_mem=4

For 2GB system

effective_cache_size = 1GB
shared_buffers = 500MB