- * - lowTTL : consider pre-emptive updates when the current TTL (sec)
- * of the key is less than this. It becomes more likely
- * over time, becoming a certainty once the key is expired.
- * [Default: WANObjectCache::LOW_TTL seconds]
- * - lockTSE : if the key is tombstoned or expired (by $checkKeys) less
- * than this many seconds ago, then try to have a single
- * thread handle cache regeneration at any given time.
- * Other threads will try to use stale values if possible.
- * If, on miss, the time since expiration is low, the assumption
- * is that the key is hot and that a stampede is worth avoiding.
- * Setting this above WANObjectCache::HOLDOFF_TTL makes no difference.
- * The higher this is set, the higher the worst-case staleness can be.
- * Use WANObjectCache::TSE_NONE to disable this logic.
- * [Default: WANObjectCache::TSE_NONE]
+ * - checkKeys: List of "check" keys.
+ * - lowTTL: Consider pre-emptive updates when the current TTL (sec) of the key is less than
+ * this. It becomes more likely over time, becoming a certainty once the key is expired.
+ * Default: WANObjectCache::LOW_TTL seconds.
+ * - lockTSE: If the key is tombstoned or expired (by checkKeys) less than this many seconds
+ * ago, then try to have a single thread handle cache regeneration at any given time.
+ * Other threads will try to use stale values if possible. If, on miss, the time since
+ * expiration is low, the assumption is that the key is hot and that a stampede is worth
+ * avoiding. Setting this above WANObjectCache::HOLDOFF_TTL makes no difference. The
+ * higher this is set, the higher the worst-case staleness can be.
+ * Use WANObjectCache::TSE_NONE to disable this logic. Default: WANObjectCache::TSE_NONE.