# =============================================================================
# postgres/audit/postgresql.conf
# PostgreSQL 15 configuration for the audit database.
# Container memory limit: 1GB (lighter than FHIR store).
# Workload: INSERT-heavy (audit events), occasional SELECT (analytics).
#
# For 1GB container:
#   shared_buffers       = 256MB
#   effective_cache_size = 768MB
#   work_mem             = 4MB
#   maintenance_work_mem = 100MB
# =============================================================================

max_connections = 20
superuser_reserved_connections = 3

shared_buffers       = 256MB
effective_cache_size = 768MB
work_mem             = 4MB
maintenance_work_mem = 100MB

wal_buffers              = 8MB
checkpoint_completion_target = 0.9
synchronous_commit       = on

random_page_cost         = 1.1
effective_io_concurrency = 200

# Logging
log_destination           = stderr
logging_collector         = off
log_min_messages          = WARNING
log_min_error_statement   = ERROR
log_min_duration_statement = 500
log_line_prefix           = '%t [%p] %u@%d '
log_checkpoints           = on
log_lock_waits            = on
log_temp_files            = 0

# Autovacuum — partitioned tables need careful autovacuum tuning.
# Each monthly partition is a separate physical table for autovacuum purposes.
autovacuum             = on
autovacuum_max_workers = 3
autovacuum_naptime     = 60s

timezone     = 'UTC'
log_timezone = 'UTC'

lc_messages = 'en_US.UTF-8'
lc_monetary = 'en_US.UTF-8'
lc_numeric  = 'en_US.UTF-8'
lc_time     = 'en_US.UTF-8'

track_io_timing = on
track_counts    = on