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Database
A PostgreSQL INVALID Index Can Add Write Overhead
A PostgreSQL index marked INVALID is unavailable to normal query planning, yet it can still add maintenance work for inserts and index-relevant…
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Database.
Practical guides, fresh perspectives and technical know-how from Voxfor.
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5 articlesArticles & guides
Database
Read the SQLite WAL Checkpoint Before Forcing TRUNCATE
An SQLite -wal file can stay large even after useful pages have been copied back to the main database. File size alone…
Database
PostgreSQL XID Age Is Rising: Find What Autovacuum Cannot Freeze
PostgreSQL transaction IDs are a countdown, not a disk-usage gauge. Every transaction that needs an XID advances a 32-bit counter. Vacuum protects…
Database
MySQL Replica Lag: Separate Receive Delay from Apply Delay
Two replicas can both report Seconds_Behind_Source: 0 while only one is current. On the healthy replica, the receiver has fetched the source's…
Database
PgBouncer on a VPS: Stop PostgreSQL Connection Exhaustion
PgBouncer can protect PostgreSQL from connection bursts by accepting many application clients while keeping a smaller, controlled set of database sessions open.…
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