# Reducing storage initialization impact in Amazon RDS for PostgreSQL after snapshot restore

DevFeed: [Reducing storage initialization impact in Amazon RDS for PostgreSQL after snapshot restore](<https://devfeed.tech/articles/reducing-storage-initialization-impact-in-amazon-rds-for-postgresql-after-snapshot-restore-87260.md>)

Original publisher: [Read original article](<https://aws.amazon.com/blogs/database/reducing-storage-initialization-impact-in-amazon-rds-for-postgresql-after-snapshot-restore/>)

Author: Sandeep Modappady

Published: 2026-10-14T15:52:26Z

Content type: tutorial

Language: en

Sources: [AWS Database Blog](<https://devfeed.tech/sources/aws-database-blog.md>)

Topics: [RDS for PostgreSQL](<https://devfeed.tech/topics/rds-for-postgresql.md>), [Amazon RDS](<https://devfeed.tech/topics/amazon-rds.md>), [PostgreSQL](<https://devfeed.tech/topics/postgresql.md>), [Cloud and systems](<https://devfeed.tech/topics/cloud-and-systems.md>), [lazy loading](<https://devfeed.tech/topics/lazy-loading.md>), [Disaster Recovery](<https://devfeed.tech/topics/disaster-recovery.md>)

Tags: [advanced-300](<https://devfeed.tech/tags/advanced-300.md>), [amazon-elastic-block-store-amazon-ebs](<https://devfeed.tech/tags/amazon-elastic-block-store-amazon-ebs.md>), [amazon-s3](<https://devfeed.tech/tags/amazon-s3.md>), [aws-cli](<https://devfeed.tech/tags/aws-cli.md>), [best-practices](<https://devfeed.tech/tags/best-practices.md>), [database-performance](<https://devfeed.tech/tags/database-performance.md>), [disaster-recovery](<https://devfeed.tech/tags/disaster-recovery.md>), [performance](<https://devfeed.tech/tags/performance.md>), [queries](<https://devfeed.tech/tags/queries.md>), [rds-for-postgresql](<https://devfeed.tech/tags/rds-for-postgresql.md>), [vacuum](<https://devfeed.tech/tags/vacuum.md>)

## AI overview

After an Amazon RDS for PostgreSQL snapshot restore, lazy loading can make queries slower while EBS blocks are fetched on demand. The article explains using pg_prewarm to hydrate data, why VACUUM ANALYZE provides limited hydration, and how to monitor initialization progress through RDS API fields and the console.

## Source excerpt

When you restore an Amazon RDS for PostgreSQL instance from a snapshot, the Amazon EBS volume hydrates lazily, so early queries can run 10x to 15x slower. This post walks through PostgreSQL-native prewarming techniques (pg_prewarm, VACUUM ANALYZE, and full table scans) and new monitoring fields to restore predictable performance faster after restore.