74 lines
2.3 KiB
Nix
74 lines
2.3 KiB
Nix
{
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config,
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lib,
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...
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}: let
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inherit (lib) mkIf;
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inherit (config.ooknet.server) database;
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in {
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# hardware based postgresql configuration for: linode nano
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# 4GB RAM 1 Core
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# generated with: <http://pgconfigurator.cybertec.at>
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config = mkIf database.postgresql {
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services.postgresql = {
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settings = {
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# Connectivity
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max_connections = 20;
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superuser_reserved_connections = 3;
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# Memory Settings
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shared_buffers = "256 MB";
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work_mem = "32 MB";
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maintenance_work_mem = "320 MB";
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huge_pages = "off";
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effective_cache_size = "1 GB";
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effective_io_concurrency = 100; # concurrent IO only really activated if OS supports posix_fadvise function
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random_page_cost = 1.25; # 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 = 0;
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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 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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# 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 = 1;
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max_parallel_workers_per_gather = 1;
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max_parallel_maintenance_workers = 1;
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max_parallel_workers = 1;
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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 = 100;
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wal_recycle = "on";
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};
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};
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};
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}
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