By Zesty Team

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We’re excited to announce that Zesty’s Pod Rightsizing now fully supports In-Place Pod Resize, a powerful feature that allows Kubernetes users to adjust resources vertically without triggering a pod restart.

Zesty’s Pod Rightsizing solution enables automated, real-time optimization of CPU and memory resources based on live usage patterns. Now, these adjustments can be made without restarting containers, ensuring consistent application performance with zero disruptions.

The Problem: Rightsizing Causes Restarts

One notable hurdle in traditional vertical scaling in Kubernetes has always been that pods must be restarted to apply new resource requests. For many engineering teams, this is a major point of friction for several key reasons:

• Stateful services can’t tolerate downtime without risk of data loss or instability.
• High-availability systems risk violating SLAs from even minor disruptions.
• Production workloads require real-time tuning without jeopardizing user experience.

So, how do most teams deal with these limitations? They don’t. The common practice today is to avoid vertical pod scaling altogether, instead overprovisioning resources to avoid potential disruptions, leading to higher cloud costs and a lot of wasted capacity. 

The Solution: Rightsize Without Restarts

The latest Kubernetes update, v1.33, introduced the In-Place Pod Resize feature that finally solves this problem. This feature can adjust container-level CPU and memory in place, while the pod is actively running. This solution is now fully integrated into Zesty’s Pod Rightsizing, eliminating the need for restarts and allowing workloads to keep operating smoothly during vertical scaling operations.

What This Means for Engineering Teams

By supporting In-Place Pod Resize, Zesty enables real-time vertical pod scaling with zero disruptions. No downtime, no cold starts, no impact on availability.

Teams can now confidently improve cost efficiency with our Pod Rightsizing solution, and only pay for the resources their applications actually need without risking downtime. Whether you’re running mission-critical databases, latency-sensitive APIs, or bursty backend services, you can now scale vertically in real time, without operational tradeoffs and performance compromise.

A Step Toward More Adaptive Kubernetes Optimization

This support for in-place scaling marks another step forward in our mission to make Kubernetes resource optimization smarter, faster, and more reliable. Zesty’s customers already benefit from capabilities like Horizontal Pod Autoscaling, Headroom Reduction, and PVC Autoscaling. Now, by supporting In-Place Pod Resize, Zesty’s Pod Rightsizing solution enables high performance at all times while reducing costs. 

No more compromise between app stability and cost efficiency. With Zesty, you get both.

Ready to scale smarter, not harder? Click here to book a demo and see Pod Rightsizing in action.