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Fine-tune postgresql

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RGBCube 2024-01-15 16:45:30 +03:00
parent 3eed5d886e
commit 784e9c4395
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hosts/cube/postgresql.nix
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@ -16,6 +16,8 @@
}];
services.postgresql = enabled {
package = pkgs.postgresql_14;
enableTCPIP = true;
authentication = lib.mkOverride 10 ''
@ -32,15 +34,83 @@
ensureDatabases = [ "grafana" "nextcloud" ];
initialScript = pkgs.writeText "postgresql-initial-script" ''
CREATE ROLE root WITH LOGIN PASSWORD NULL CREATEDB;
ensureUsers = [
{
name = "postgres";
ensureClauses = {
createdb = true;
createrole = true;
login = true;
replication = true;
superuser = true;
};
}
{
name = "grafana";
ensureDBOwnership = true;
}
{
name = "nextcloud";
ensureDBOwnership = true;
}
];
CREATE ROLE grafana WITH LOGIN PASSWORD NULL CREATEDB;
GRANT ALL PRIVILEGES ON DATABASE grafana TO grafana;
# https://pgconfigurator.cybertec.at/
settings = {
max_connections = 100;
superuser_reserved_connections = 3;
CREATE ROLE nextcloud WITH LOGIN PASSWORD NULL CREATEDB;
GRANT ALL PRIVILEGES ON DATABASE nextcloud TO nextcloud;
'';
# Memory Settings
shared_buffers = "1024 MB";
work_mem = "32 MB";
maintenance_work_mem = "320 MB";
huge_pages = "off";
effective_cache_size = "3 GB";
effective_io_concurrency = 1; # Concurrent IO only really activated if OS supports posix_fadvise function.
random_page_cost = 4; # Speed of random disk access relative to sequential access (1.0).
# Monitoring
shared_preload_libraries = "pg_stat_statements"; # Per statement resource usage stats.
track_io_timing = "on"; # Measure exact block IO times.
track_functions = "pl"; # Track execution times of pl-language procedures if any.
# Replication
wal_level = "replica";
max_wal_senders = 0;
synchronous_commit = "on";
# Checkpointing
checkpoint_timeout = "15 min";
checkpoint_completion_target = 0.9;
max_wal_size = "1024 MB";
min_wal_size = "512 MB";
# WAL writing
wal_compression = "on";
wal_buffers = -1; # auto-tuned by Postgres till maximum of segment size (16MB by default).
wal_writer_delay = "200ms";
wal_writer_flush_after = "1MB";
# Background writer
bgwriter_delay = "200ms";
bgwriter_lru_maxpages = 100;
bgwriter_lru_multiplier = 2.0;
bgwriter_flush_after = 0;
# Parallel queries
max_worker_processes = 2;
max_parallel_workers_per_gather = 1;
max_parallel_maintenance_workers = 1;
max_parallel_workers = 2;
parallel_leader_participation = "on";
# Advanced features
enable_partitionwise_join = "on";
enable_partitionwise_aggregate = "on";
jit = "on";
max_slot_wal_keep_size = "1000 MB";
track_wal_io_timing = "on";
};
};
})