Tencent Cloud Developer

Jan 14, 2021 · Databases

PostgreSQL Master-Slave Replication Performance Optimization: Solving Drop Table Bottleneck

The article explains how massive DROP TABLE operations in PostgreSQL master‑slave replication trigger costly buffer‑invalidation loops that cause severe lag, and describes extracting this step into a separate subprocess with a shared hash table, cutting replication lag from over 400 GB to about 10 MB—a 30,000‑fold speedup.