export interface ProcessRssSample {
    pid: number;
    rssBytes: number | null;
    source: 'procfs' | 'ps' | 'unavailable';
    error?: string;
}
export declare function parseProcStatusRssBytes(statusText: string): number | null;
export declare function parsePsRssBytes(psOutput: string): number | null;
export declare function readProcessRssBytes(pid: number): ProcessRssSample;
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