# Silo PostgreSQL Performance Configuration
# Tuned for: modern multi-core CPU, NVMe/Optane storage, ~8GB max RAM usage
# DB Type: Web application (read-heavy, DB fits in RAM)
#
# Adjust values for your hardware, or use https://pgtune.leopard.in.ua/
# with DB Type "Web application" to generate settings.

# Connections
listen_addresses = '*'
max_connections = 100

# Memory (tuned to keep PG under ~8GB total)
shared_buffers = 4GB               # holds the entire DB in cache (typical DB is 1-4GB)
effective_cache_size = 6GB         # planner hint only, not an allocation
work_mem = 32MB                    # per-operation sort/hash memory
maintenance_work_mem = 512MB       # VACUUM, CREATE INDEX, catalog imports

# WAL / Write Performance
wal_buffers = 64MB
min_wal_size = 512MB
max_wal_size = 2GB
checkpoint_completion_target = 0.9

# Storage (NVMe/Optane)
random_page_cost = 1.1             # default 4.0; NVMe random ≈ sequential
effective_io_concurrency = 200     # NVMe handles many concurrent requests

# Parallelism
max_worker_processes = 8
max_parallel_workers_per_gather = 4
max_parallel_workers = 8
max_parallel_maintenance_workers = 4

# Huge Pages (Linux only, no effect on macOS)
huge_pages = try

# Logging (uncomment to log slow queries)
# log_min_duration_statement = 250