# PostgreSQL Configuration File
# Optimized for Meldestelle application

# Connection Settings
listen_addresses = '*'
max_connections = 100
superuser_reserved_connections = 3

# Memory Settings
# These will be overridden by environment variables in docker-compose.yml
shared_buffers = 256MB                  # min 128kB
work_mem = 16MB                         # min 64kB
maintenance_work_mem = 64MB             # min 1MB
effective_cache_size = 768MB

# Write-Ahead Log (WAL)
wal_level = replica                     # minimal, replica, or logical
max_wal_size = 1GB
min_wal_size = 80MB
wal_buffers = 16MB                      # min 32kB, -1 sets based on shared_buffers
checkpoint_completion_target = 0.9      # checkpoint target duration, 0.0 - 1.0
random_page_cost = 1.1                  # For SSD storage

# Background Writer
bgwriter_delay = 200ms
bgwriter_lru_maxpages = 100
bgwriter_lru_multiplier = 2.0

# Asynchronous Behavior
effective_io_concurrency = 200          # For SSD storage
max_worker_processes = 8
max_parallel_workers_per_gather = 4
max_parallel_workers = 8
max_parallel_maintenance_workers = 4

# Query Planner
default_statistics_target = 100
constraint_exclusion = partition

# Logging
log_destination = 'stderr'
logging_collector = on
log_directory = 'log'
log_filename = 'postgresql-%Y-%m-%d_%H%M%S.log'
log_truncate_on_rotation = off
log_rotation_age = 1d
log_rotation_size = 100MB
log_min_duration_statement = 250ms      # Log slow queries (250ms or slower)
log_checkpoints = on
log_connections = on
log_disconnections = on
log_lock_waits = on
log_temp_files = 0
log_autovacuum_min_duration = 250ms
log_line_prefix = '%m [%p] %q%u@%d '

# Autovacuum
autovacuum = on
autovacuum_max_workers = 3
autovacuum_naptime = 1min
autovacuum_vacuum_threshold = 50
autovacuum_analyze_threshold = 50
autovacuum_vacuum_scale_factor = 0.05
autovacuum_analyze_scale_factor = 0.025
autovacuum_vacuum_cost_delay = 20ms
autovacuum_vacuum_cost_limit = 2000

# Statement Behavior
search_path = '"$user", public'
row_security = on

# Client Connection Defaults
client_min_messages = notice
statement_timeout = 60000               # 60 seconds, prevents long-running queries
lock_timeout = 10000                    # 10 seconds, prevents lock contention
idle_in_transaction_session_timeout = 600000  # 10 minutes, prevents idle transactions

# Disk
temp_file_limit = 1GB                   # Limits temp file size

# SSL
ssl = off
ssl_prefer_server_ciphers = on

# Performance Monitoring
track_activities = on
track_counts = on
track_io_timing = on
track_functions = pl                    # none, pl, all
track_activity_query_size = 2048