Struct DatabaseConfig 

pub struct DatabaseConfig {
    pub memory_budget: usize,
    pub disk_budget: usize,
    pub spill_policy: SpillPolicy,
    pub sql_mode: SqlMode,
    pub columnar_cache_budget: usize,
}

Configuration for database resource budgets

Fields

memory_budget: usize

Maximum memory for indexes and buffer pools (bytes)

disk_budget: usize

Maximum disk space for database files (bytes)

spill_policy: SpillPolicy

Policy for handling memory budget violations

sql_mode: SqlMode

SQL dialect compatibility mode (MySQL, SQLite, etc.)

columnar_cache_budget: usize

Maximum memory for columnar cache (bytes) Set to 0 to disable the columnar cache

Implementations

impl DatabaseConfig

pub fn browser_default() -> Self

Default configuration for browser/WASM environments

• 512MB memory budget (conservative for browsers)
• 2GB disk budget (typical OPFS quota)
• SpillToDisk policy (automatic eviction)
• MySQL mode (default)
• 64MB columnar cache (modest for browser memory constraints)

pub fn server_default() -> Self

Default configuration for server environments

• 16GB memory budget (abundant server RAM)
• 1TB disk budget (generous server storage)
• BestEffort policy (prefer memory, fall back to disk)
• MySQL mode (default)
• 256MB columnar cache (can cache all TPC-H tables at SF 1.0)

pub fn test_default() -> Self

Minimal configuration for testing

• 10MB memory budget (force eviction quickly)
• 100MB disk budget
• SpillToDisk policy
• MySQL mode (default)
• 1MB columnar cache (tiny for testing eviction)

Trait Implementations

impl Clone for DatabaseConfig

fn clone(&self) -> DatabaseConfig

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for DatabaseConfig

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for DatabaseConfig

fn default() -> Self

Returns the “default value” for a type.