---
title: "cloud-computing"
author: "Mohammad Abu Mattar"
canonical: https://mkabumattar.com/case-studies/categories/cloud-computing
---

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# Cloud computing

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# Cloud computing

[![Zero-Downtime PostgreSQL Major-Version Upgrade at Scale](/_astro/hero.C03RcOLI_141vsK.webp)](/case-studies/post/zero-downtime-postgres-upgrade)

## [Zero-Downtime PostgreSQL Major-Version Upgrade at Scale](/case-studies/post/zero-downtime-postgres-upgrade)

-   [Mohammad Abu Mattar](/authors/mohammad-abu-mattar)
-   [DevOps](/case-studies/categories/devops)
-   [Databases](/case-studies/categories/databases)
-   [Cloud Computing](/case-studies/categories/cloud-computing)
-   Published: 25 Jul, 2026
-   Updated: 25 Jul, 2026

A multi-terabyte PostgreSQL 12 database was reaching end of life, and the business ran around the clock, so the usual answer of "schedule a maintenance window" was off the table. We upgraded it to Pos

[#PostgreSQL](/case-studies/tags/postgresql)[#Logical Replication](/case-studies/tags/logical-replication)[#Zero Downtime](/case-studies/tags/zero-downtime)+3 tags

[Read Case Study](/case-studies/post/zero-downtime-postgres-upgrade)

[![Cutting a SaaS AWS Bill 41% Without Slowing Delivery](/_astro/hero.DJTB593d_Z1iASgs.webp)](/case-studies/post/aws-cost-optimization-saas-case-study)

## [Cutting a SaaS AWS Bill 41% Without Slowing Delivery](/case-studies/post/aws-cost-optimization-saas-case-study)

-   [Mohammad Abu Mattar](/authors/mohammad-abu-mattar)
-   [Cloud Computing](/case-studies/categories/cloud-computing)
-   [DevOps](/case-studies/categories/devops)
-   [Cloud Native](/case-studies/categories/cloud-native)
-   Published: 19 Jul, 2026

A growing SaaS ran on EKS with a full GitOps pipeline, and it was over its AWS budget nearly every month. The reflex from leadership was the usual one: freeze features until the bill comes down. That

[#AWS](/case-studies/tags/aws)[#EKS](/case-studies/tags/eks)[#Kubernetes](/case-studies/tags/kubernetes)+7 tags

[Read Case Study](/case-studies/post/aws-cost-optimization-saas-case-study)