pgtune

type AutoConfFile struct {
	Parameters map[string]*AutoConfParameter
	Comments   []string // standalone comments (not associated with parameters)
}

type AutoConfParameter struct {
	Name    string
	Value   string
	Comment string // inline comment if any
}

type OptimizeOptions struct {
	DataDir        string
	DBType         sysinfo.DBType
	MaxConnections int
	SystemInfo     *sysinfo.SystemInfo
}

type PostProcessor func(*pkg.PostgresConf, *sysinfo.SystemInfo) error

type TunedParameters struct {
	// Memory parameters (in KB unless noted)
	SharedBuffers      uint64 // shared_buffers
	EffectiveCacheSize uint64 // effective_cache_size
	MaintenanceWorkMem uint64 // maintenance_work_mem
	WorkMem            uint64 // work_mem

	// WAL parameters (in KB unless noted)
	WalBuffers                 uint64  // wal_buffers
	MinWalSize                 uint64  // min_wal_size
	MaxWalSize                 uint64  // max_wal_size
	CheckpointCompletionTarget float64 // checkpoint_completion_target

	// Performance parameters
	RandomPageCost          float64 // random_page_cost
	EffectiveIoConcurrency  *int    // effective_io_concurrency (nil if not applicable)
	DefaultStatisticsTarget int     // default_statistics_target

	// Parallel processing parameters
	MaxWorkerProcesses            int  // max_worker_processes
	MaxParallelWorkers            int  // max_parallel_workers (PG 10+)
	MaxParallelWorkersPerGather   int  // max_parallel_workers_per_gather
	MaxParallelMaintenanceWorkers *int // max_parallel_maintenance_workers (PG 11+)

	// WAL level settings
	WalLevel      string // wal_level
	MaxWalSenders *int   // max_wal_senders (set to 0 when wal_level=minimal)

	// Connection parameters
	MaxConnections int // max_connections

	// Huge pages setting
	HugePages string // huge_pages

	// Warning messages for memory constraints
	Warnings []string
}

type TuningConfig struct {
	// SystemInfo contains detected system information
	SystemInfo *sysinfo.SystemInfo

	// MaxConnections is the maximum number of database connections
	MaxConnections int

	// DBType is the database workload type
	DBType sysinfo.DBType

	// DiskType overrides detected disk type if specified
	DiskType *sysinfo.DiskType
}