List MongoDB TTL Indexes and Retention Periods

Shows TTL indexes and retention periods per collection. Used to audit data retention policies and unexpected deletions.

#ttl#expire#retention

mongodb · javascript

const out = [];
db.getCollectionInfos({ type: "collection" }).forEach(c => {
  db.getCollection(c.name).getIndexes().forEach(i => {
    if (i.expireAfterSeconds !== undefined) {
      out.push({ collection: c.name, index: i.name, key: JSON.stringify(i.key),
                 expire_days: +(i.expireAfterSeconds / 86400).toFixed(2) });
    }
  });
});
console.table(out);

Operational Notes & Remediation Guidance

Verify in a staging environment prior to running in production. This is a read-only diagnostic query; it does not acquire exclusive locks.

Production Safety & Execution Standards

This script is designed for read-only diagnostics; it does not alter schema or modify data directly.
Prior to executing on production systems under high load, verify the target database version (Min. Version: 4.0).
Exercise caution with mutating actions (e.g., terminating sessions or dropping indexes) referenced in the notes section.

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