/**
 * Memory Management Utility
 * Provides memory monitoring, garbage collection triggering, and memory pressure handling
 */
export interface MemoryStats {
    used: number;
    total: number;
    external: number;
    percentUsed: number;
}
export interface MemoryOptions {
    maxMemoryMB?: number;
    gcThresholdMB?: number;
    aggressiveCleanup?: boolean;
}
export declare class MemoryManager {
    private static readonly DEFAULT_MAX_MEMORY;
    private static readonly DEFAULT_GC_THRESHOLD;
    private static readonly CRITICAL_MEMORY_THRESHOLD;
    /**
     * Get current memory usage statistics
     */
    static getMemoryStats(): MemoryStats;
    /**
     * Check if memory usage is critical
     */
    static isMemoryCritical(maxMemoryMB?: number): boolean;
    /**
     * Force garbage collection if available
     */
    static forceGarbageCollection(): void;
    /**
     * Clean up memory aggressively
     */
    static cleanupMemory(): Promise<void>;
    /**
     * Monitor memory and cleanup if needed
     */
    static checkAndCleanupMemory(options?: MemoryOptions): Promise<boolean>;
    /**
     * Execute a function with memory monitoring
     */
    static withMemoryMonitoring<T>(operation: () => Promise<T>, options?: MemoryOptions): Promise<T>;
    /**
     * Get adaptive image quality based on memory pressure
     */
    static getAdaptiveImageQuality(pageCount: number, currentPage: number): number;
    /**
     * Get adaptive image scale based on memory pressure
     */
    static getAdaptiveImageScale(pageCount: number, _currentPage: number): number;
}
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