https://www.pistack.xyz/tags/maintenance/ Recent content in Maintenance on Pi Stack Hugo en-us Mon, 11 May 2026 00:00:00 +0000 https://www.pistack.xyz/posts/2026-05-11-postgresql-table-maintenance-pg-repack-pg-squeeze-pgcompacttable/ Mon, 11 May 2026 00:00:00 +0000 https://www.pistack.xyz/posts/2026-05-11-postgresql-table-maintenance-pg-repack-pg-squeeze-pgcompacttable/ <p>PostgreSQL&rsquo;s MVCC (Multi-Version Concurrency Control) architecture means that every UPDATE and DELETE leaves behind dead tuples. Over time, these dead tuples accumulate as table bloat, degrading query performance and wasting disk space. While PostgreSQL&rsquo;s autovacuum daemon handles basic cleanup, it cannot rebuild tables or indexes without acquiring exclusive locks that block all reads and writes.</p>