/**
 * Publicly relevant metadata fields for a Queue, read from the queue's
 * Redis `meta` key.
 *
 * This interface documents the subset of meta-hash fields that BullMQ
 * exposes to consumers (e.g. via `Queue.getQueueOpts`, `Queue.getRateLimit`,
 * `Queue.isPaused`); the underlying hash also stores internal fields
 * (e.g. metrics counters) that are not part of this type.
 */
export interface QueueMeta {
    /**
     * Maximum number of jobs that can be processed concurrently across all
     * workers attached to this queue. Set via `Queue.setGlobalConcurrency`.
     */
    concurrency?: number;
    /**
     * Maximum number of jobs allowed in the rate-limit window of `duration`
     * milliseconds. Set via `Queue.setGlobalRateLimit`.
     */
    max?: number;
    /**
     * Length of the rate-limit window in milliseconds, paired with `max`.
     * Set via `Queue.setGlobalRateLimit`.
     */
    duration?: number;
    /**
     * Maximum length of the queue's events stream. Older events are evicted
     * in FIFO order once the stream grows beyond this size.
     *
     * Note: `maxLenEvents` is not a guaranteed upper bound. BullMQ relies on
     * Redis's `XTRIM` "fast trim" (`MAXLEN ~ N`), which is a best-effort
     * cap — the stream may retain noticeably more events than this value at
     * any given moment.
     */
    maxLenEvents?: number;
    /**
     * True when the queue has been paused. While paused, workers will not
     * pick up new jobs.
     */
    paused?: boolean;
    /**
     * BullMQ version that produced this queue's data, used for compatibility
     * checks across upgrades.
     */
    version?: string;
}