https://www.netdata.cloud/tags/ksm/Recent content in Ksm on NetdataHugoen-usTue, 01 Nov 2022 00:00:00 +0000https://www.netdata.cloud/blog/ksm/Tue, 01 Nov 2022 00:00:00 +0000https://www.netdata.cloud/blog/ksm/<p>Monitoring KSM (Kernel Same-page Merging) performance at deduping memory shared across VMs.</p> <!--truncate--> <h2 id="kernel-same-page-merging-ksm">Kernel Same-page Merging (KSM)</h2> <p>Linux kernels store memory in <strong>pages</strong> which are moved in and out of memory as a single block. On most Linux architectures pages are 4096 bytes. <strong>KSM</strong> (Kernel Same-page Merging) is a kernel feature that scans memory looking for pages with identical content, and then de-duplicates them. The most common use-case where such duplicate pages occur is on hosts running multiple virtual machines (VMs).</p>