Recover Process (RECO)
Healing Distributed Transactions 🔄
🔁 What Is RECO?
The Recoverer Process (RECO) is a background process responsible for automatically resolving in-doubt transactions in a distributed database system—a group of databases that collaborate and appear as a single system to applications.
⚙️ What Does RECO Do?
| 💼 Task | 🔍 Details |
|---|---|
| 🔄 Auto-Resolution | RECO resolves in-doubt distributed transactions caused by network or system failures. |
| 🔗 Reconnects | Once the connection between databases is restored, RECO automatically reconnects and resolves pending transactions. |
| 🗃️ Cleanup | After resolution, RECO removes entries from the pending transaction table in each involved database. |
🌐 Where It Operates
- Works in distributed database systems (multiple Oracle databases communicating).
- Runs as a thread or OS process, depending on the platform.
🧩 Why It’s Important
- Prevents transaction inconsistencies across databases.
- Automates cleanup—no manual intervention needed for most distributed transaction failures.
- Supports data integrity across networked systems.
📘 Tip of the Day:
If you regularly use distributed transactions, monitor the pending transaction table (DBA_2PC_PENDING) to review any unresolved cases that RECO might still be working on.