Why Unbounded Arrays are Time Bombs - 010

Mee array size 'ippudu takkuve kada' ani lite teesukunnara? 6 months tarwata ade array mee server ni crash chestundi.

Core Explanation: Array size perugutunte, document size perugutundi. Okka element push chesina, MongoDB entire document ni disk lo re-write cheyalsi ravochu (if it outgrows allocated space). Plus, indexing arrays creates multi-key indexes. Antha pedda array ni index chesthe, index bloat confirm.

Wrong Practice: Storing logs or history in an array.

// Audit Log in User Doc
{
  "username": "pavan",
  "activity_log": [ ...keeps growing forever... ]
}

Best Practice: Outlier Pattern or Separate Collection.

// Move logs to separate collection
db.logs.insert({ "user_id": "pavan", "activity": "login" })

Or Limit the array slice:

$push: { activity_log: { $each: [newItem], $slice: -10 } } // Keep only last 10

Closing Insight: "Arrays ki eppudu clear 'Max Limit' undali. Unlimited array = Future outage."