How to Deal With AWS RDS Maintenance Windows

Amazon RDS is one of the best MySQL-based DBaaS services from Amazon AWS. It provides high availability, resizable capacity, and consistent performance to your applications. To take advantage of the RDS features, we need to design, operate and apply the best practices to RDS to utilize the capability of it to the max extent.

In the last 2 months, we had so many security issues identified in Linux, hypervisors, and MySQL applications that impacted on the Amazon Infrastructure too. To mitigate the security issues, Amazon needs to perform some maintenance activity on the underlying EC2 Instances of RDS MySQL and to patch to the MySQL supported versions. These activities will impact the availability of RDS Instance during the maintenance window.

Amazon is introducing many new features to its existing services to provide top-notch solutions to its customers. Recently, they introduced General Purpose SSD and Provisioned IOPS (SSD) Storage Volumes for RDS instances to deliver fast, predictable, and consistent performance for I/O intensive transactional database workloads. They also introduced other new features like memory-optimized DB Instances, pre-warming InnoDB buffer pool on reboot and even more. Yet again, you need to reboot your RDS instances to take advantage of these new features.
To mitigate the risk of RDS instances unavailability during the maintenance window, some good practices come in handy. Let’s see how to deal with them:

1. Turn on Multi-AZ mode. This is the first and foremost thing to do to improve the availability and enable the built-in automated fail-over from your primary database to a synchronously replicated secondary database in case of a failure or reboot or any maintenance activity.

2. Enable Event Subscriptions to get the notifications of all the Events happening on the RDS instance.

When you subscribe for the Events, it will deliver the Events details to the given Notification Email IDs.

3. Enable CloudWatch metrics on RDS Instances to monitor the replication status between the Master and Read-Replicas. Replication may fail because of changes to the master RDS instance or DB Instance shutdown, so it’s good to have this feature on.

4. Verify the RDS DB Instance reachability, memory and number of DB Connections to understand whether it receives connections or not.

5. In Multi-AZ mode, RDS might take some 30 – 300 seconds to switch to the Fail-Over node, so notify the respective stakeholders on the maintenance activity and approximate downtime.
This is the minimum set of things that you should enable to deal with the AWS RDS maintenance and minimize your downtime. Nevertheless, additional hints and best practices should be deployed

to further increase both the availability and performance of your infrastructure:

  • Read-Replica in Cross-Region: create a read-replica in cross-region to maximize the availability. Whenever primary region outage happens, we can promote the read-replica as the master instance and get the DB instance available all the time.
  • General Purpose (SSD) storage for Consistent Performance: for small and medium database workloads, modify the Storage Type to the General Purpose (SSD) Storage for consistent IOPS delivery for Database operations.
  • Change the Instance type to Current Generation: change the RDS Instance type to Current Generation Instance Types: T2, M3, R3 as per your workload requirements. The newer generation instances will give us the best RAM, CPU, and Networking capabilities compared to the previous generation instance types T1, M1, C1, M2, etc.
  • Tune the MySQL Parameters of RDS as you Scale: When you Scale up and Scale down your RDS instance, there will be many parameters depending on your RDS IOPS, Memory, CPU and networking. Tune them accordingly, otherwise, it will lead to bad performance of the RDS instances.

Avatar

Written by

Praveen Kumar Muppala

I have strong experience on Multiple Unix/Linux flavours, LAMP Stack, Monitoring Systems, Database, NoSQL. I love to explore the new concepts/services in Cloud Computing World. I have written 4 certifications in different flavours of Linux/Unix.


Related Posts

Amanda Cross
Amanda Cross
— January 7, 2021

New Content: AWS Terraform, Java Programming Lab Challenges, Azure DP-900 & DP-300 Certification Exam Prep, Plus Plenty More Amazon, Google, Microsoft, and Big Data Courses

This month our Content Team continues building the catalog of courses for everyone learning about AWS, GCP, and Microsoft Azure. In addition, this month’s updates include several Java programming lab challenges and a couple of courses on big data. In total, we released five new learning...

Read more
  • AWS
  • Azure
  • DevOps
  • Google Cloud Platform
  • Machine Learning
  • programming
Avatar
Stuart Scott
— December 17, 2020

Where Should You Be Focusing Your AWS Security Efforts?

Another day, another re:Invent session! This time I listened to Stephen Schmidt’s session, “AWS Security: Where we've been, where we're going.” Amongst covering the highlights of AWS security during 2020, a number of newly added AWS features/services were discussed, including: AWS Audit...

Read more
  • AWS
  • AWS re:Invent
  • cloud security
Joe Nemer
Joe Nemer
— December 4, 2020

AWS re:Invent: 2020 Keynote Top Highlights and More

We’ve gotten through the first five days of the special all-virtual 2020 edition of AWS re:Invent. It’s always a really exciting time for practitioners in the field to see what features and services AWS has cooked up for the year ahead.  This year’s conference is a marathon and not a...

Read more
  • AWS
  • AWS Glue Elastic Views
  • AWS re:Invent
Bryony Harrower
Bryony Harrower
— November 6, 2020

WARNING: Great Cloud Content Ahead

At Cloud Academy, content is at the heart of what we do. We work with the world’s leading cloud and operations teams to develop video courses and learning paths that accelerate teams and drive digital transformation. First and foremost, we listen to our customers’ needs and we stay ahea...

Read more
  • AWS
  • Azure
  • content roadmap
  • GCP
Joe Nemer
Joe Nemer
— October 25, 2020

Excelling in AWS, Azure, and Beyond – How Danut Prisacaru Prepares for the Future

Meet Danut Prisacaru. Danut has been a Software Architect for the past 10 years and has been involved in Software Engineering for 30 years. He’s passionate about software and learning, and jokes that coding is basically the only thing he can do well (!). We think his enthusiasm shines t...

Read more
  • AWS
  • careers
  • champions
  • upskilling
Joe Nemer
Joe Nemer
— October 14, 2020

New Content: AWS Data Analytics – Specialty Certification, Azure AI-900 Certification, Plus New Learning Paths, Courses, Labs, and More

This month our Content Team released two big certification Learning Paths: the AWS Certified Data Analytics - Speciality, and the Azure AI Fundamentals AI-900. In total, we released four new Learning Paths, 16 courses, 24 assessments, and 11 labs.  New content on Cloud Academy At any ...

Read more
  • AWS
  • Azure
  • DevOps
  • Google Cloud Platform
  • Machine Learning
  • programming
Joe Nemer
Joe Nemer
— September 15, 2020

New Content: Azure DP-100 Certification, Alibaba Cloud Certified Associate Prep, 13 Security Labs, and Much More

This past month our Content Team served up a heaping spoonful of new and updated content. Not only did our experts release the brand new Azure DP-100 Certification Learning Path, but they also created 18 new hands-on labs — and so much more! New content on Cloud Academy At any time, y...

Read more
  • AWS
  • Azure
  • DevOps
  • Google Cloud Platform
  • Machine Learning
  • programming
Joe Nemer
Joe Nemer
— August 28, 2020

AWS Certification Practice Exam: What to Expect from Test Questions

If you’re building applications on the AWS cloud or looking to get started in cloud computing, certification is a way to build deep knowledge in key services unique to the AWS platform. AWS currently offers 12 certifications that cover major cloud roles including Solutions Architect, De...

Read more
  • AWS
  • AWS Certifications
Patrick Navarro
Patrick Navarro
— August 25, 2020

Overcoming Unprecedented Business Challenges with AWS

From auto-scaling applications with high availability to video conferencing that’s used by everyone, every day —  cloud technology has never been more popular or in-demand. But what does this mean for experienced cloud professionals and the challenges they face as they carve out a new p...

Read more
  • AWS
  • Cloud Adoption
  • digital transformation
Avatar
Andrew Larkin
— August 18, 2020

Constant Content: Cloud Academy’s Q3 2020 Roadmap

Hello —  Andy Larkin here, VP of Content at Cloud Academy. I am pleased to release our roadmap for the next three months of 2020 — August through October. Let me walk you through the content we have planned for you and how this content can help you gain skills, get certified, and...

Read more
  • alibaba
  • AWS
  • Azure
  • content roadmap
  • Content updates
  • DevOps
  • GCP
  • Google Cloud
  • New content
Alisha Reyes
Alisha Reyes
— August 5, 2020

New Content: Alibaba, Azure AZ-303 and AZ-304, Site Reliability Engineering (SRE) Foundation, Python 3 Programming, 16 Hands-on Labs, and Much More

This month our Content Team did an amazing job at publishing and updating a ton of new content. Not only did our experts release the brand new AZ-303 and AZ-304 Certification Learning Paths, but they also created 16 new hands-on labs — and so much more! New content on Cloud Academy At...

Read more
  • AWS
  • Azure
  • DevOps
  • Google Cloud Platform
  • Machine Learning
  • programming
Alisha Reyes
Alisha Reyes
— July 16, 2020

Blog Digest: Which Certifications Should I Get?, The 12 Microsoft Azure Certifications, 6 Ways to Prevent a Data Breach, and More

This month, we were excited to announce that Cloud Academy was recognized in the G2 Summer 2020 reports! These reports highlight the top-rated solutions in the industry, as chosen by the source that matters most: customers. We're grateful to have been nominated as a High Performer in se...

Read more
  • AWS
  • Azure
  • blog digest
  • Certifications
  • Cloud Academy
  • OWASP
  • OWASP Top 10
  • Security
  • VPCs