Nixfiles! :3
Doing something crazy I may regret.
MLC Bloeiman
(Jul 11, 2026, 9:31 PM +0200)
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home/cli.nix
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home/cli.nix
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home/host-specific/Cubchoo.nix
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home/host-specific/Cubchoo.nix
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{ }
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{ pkgs, config, ... }: {
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services.podman = {
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networks = {
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"server-net" = {
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autoStart = true;
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};
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};
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containers = {
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"main-database" = {
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autoStart = true;
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networkAlias = [
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"main-database"
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"db"
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];
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network = "server-net";
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image = "postgres:18-alpine";
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environment = {
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"POSTGRES_HOST_AUTH_METHOD" = "trust";
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};
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volumes = [
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"${config.home.homeDirectory}/database:/var/lib/postgresql:Z"
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"${config.home.homeDirectory}/.config/services/main-database/postgresql.conf:/etc/postgresql/postgresql.conf:ro"
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];
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exec = "postgres -c 'config_file=/etc/postgresql/postgresql.conf'";
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};
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};
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};
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xdg.configFile."services/main-database/postgresql.conf".text = ''
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# Connectivity
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max_connections = 200
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superuser_reserved_connections = 3
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listen_addresses='*'
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# Memory Settings
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shared_buffers = '4096 MB'
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work_mem = '32 MB'
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maintenance_work_mem = '420 MB'
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huge_pages = off
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effective_cache_size = '11 GB'
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effective_io_concurrency = 1 # concurrent IO only really activated if OS supports posix_fadvise function
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random_page_cost = 4 # speed of random disk access relative to sequential access (1.0)
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# Monitoring
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shared_preload_libraries = 'pg_stat_statements' # per statement resource usage stats
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track_io_timing=on # measure exact block IO times
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track_functions=pl # track execution times of pl-language procedures if any
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# Replication
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wal_level = replica # consider using at least 'replica'
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max_wal_senders = 10
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synchronous_commit = on
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# Checkpointing:
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checkpoint_timeout = '15 min'
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checkpoint_completion_target = 0.9
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max_wal_size = '1024 MB'
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min_wal_size = '512 MB'
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# WAL archiving
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archive_mode = on # having it on enables activating P.I.T.R. at a later time without restart›
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archive_command = '/bin/true' # not doing anything yet with WAL-s
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# WAL writing
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wal_compression = on
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wal_buffers = -1 # auto-tuned by Postgres till maximum of segment size (16MB by default)
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wal_writer_delay = 200ms
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wal_writer_flush_after = 1MB
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wal_keep_size = '3650 MB'
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# Background writer
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bgwriter_delay = 200ms
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bgwriter_lru_maxpages = 100
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bgwriter_lru_multiplier = 2.0
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bgwriter_flush_after = 0
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# Parallel queries:
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max_worker_processes = 8
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max_parallel_workers_per_gather = 4
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max_parallel_maintenance_workers = 4
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max_parallel_workers = 8
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parallel_leader_participation = on
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# Advanced features
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enable_partitionwise_join = on
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enable_partitionwise_aggregate = on
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jit = on
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max_slot_wal_keep_size = '1000 MB'
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track_wal_io_timing = on
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maintenance_io_concurrency = 1
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wal_recycle = on
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'';
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}