JVM Heap Memory Estimator
Estimate Xms, Xmx, Metaspace, OS reserve, and per-instance memory for Lucee or Adobe ColdFusion servers.
Calculation runs locally and no server metrics are collected.
About the JVM memory estimator
Use the recommendation as a starting point for configuring `-Xms`, `-Xmx`, and Metaspace in Lucee or Adobe ColdFusion. Tune it later with real environment data.
Frequently Asked Questions
Are these values final?
No. They are an initial estimate. Confirm real usage with metrics, garbage collection, and production load.
How much memory remains for the OS?
The calculator reserves part of RAM for the operating system, services, and usage spikes before splitting memory among instances.