Kernel Same-Page Merging icon

Kernel Same-Page Merging

Kernel Same-Page Merging

Plugin: proc.plugin Module: /sys/kernel/mm/ksm


Kernel Samepage Merging (KSM) is a memory-saving feature in Linux that enables the kernel to examine the memory of different processes and identify identical pages. It then merges these identical pages into a single page that the processes share. This is particularly useful for virtualization, where multiple virtual machines might be running the same operating system or applications and have many identical pages.

The collector provides information about the operation and effectiveness of KSM on your system.

This collector is supported on all platforms.

This collector only supports collecting metrics from a single instance of this integration.

Default Behavior


This integration doesn’t support auto-detection.


The default configuration for this integration does not impose any limits on data collection.

Performance Impact

The default configuration for this integration is not expected to impose a significant performance impact on the system.



No action required.



There is no configuration file.


There are no configuration options.


There are no configuration examples.


Metrics grouped by scope.

The scope defines the instance that the metric belongs to. An instance is uniquely identified by a set of labels.

Per Kernel Same-Page Merging instance

This scope has no labels.


Metric Dimensions Unit
mem.ksm shared, unshared, sharing, volatile MiB
mem.ksm_savings savings, offered MiB
mem.ksm_ratios savings percentage


There are no alerts configured by default for this integration.

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