PgCache — Smart Read Replica for PostgreSQL

PgCache is a smart read replica for PostgreSQL: a wire-compatible proxy that caches the hot working set driving most of your traffic. Cut read-replica storage, compute, and Aurora IO costs — change one connection string, no Redis layer, no app rewrite.

Why teams use PgCache

• Copies only hot data — Fractional storage and cost vs a full traditional replica.
• Never serves stale data — Logical replication keeps cache fresh; unsafe queries go to origin.
• Drop-in, no code changes — Same Postgres wire protocol. Point reads at PgCache.
• Predictable hourly software — Flat per-instance rate on AWS Marketplace. No per-query fees.

Pricing (AWS Marketplace software)

Billed hourly. Monthly equivalents at ~730 hrs (software only; EC2 extra). Free Tier: t4g.small at $0/hr.

• Medium (m6g.medium) — $0.0681/hr ≈ $50/mo
• Large (m6g.large) — $0.137/hr ≈ $100/mo · Recommended
• XLarge (m6g.xlarge) — $0.274/hr ≈ $200/mo
• Also available — m6g.2xlarge (~$400/mo) and m6g.4xlarge (~$700/mo)

Site all-in estimates (software + EC2 us-east-1) top out around ~$12–$1,150/mo depending on size. 30-day free trial on AWS Marketplace.

Deploy via AWS Marketplace, Docker, or bare metal. Learn more at pgcache.com.