#memory
Every post tagged memory.
Blog posts
How to Use KSM (Kernel Samepage Merging) in Proxmox VE to Save RAM on Multiple VMs
KSM quietly deduplicates identical memory pages across similar VMs on a Proxmox VE host. Here's what it actually does, how to check if it's saving you RAM, and how to disable it node-wide or per VM.
How to Increase CPU Cores and RAM for an LXC Container in Proxmox VE (pct set Explained)
Your LXC container outgrew its original cores and memory? Here's how to safely add more of both using pct set or the web GUI, and why some app changes need a restart while others don't.
How to Add or Increase Swap Space on a Proxmox VE Host (LVM and ZFS)
Running low on RAM on your Proxmox VE host? Here's how to check your current swap, extend it safely on LVM, add a swap file on ext4/XFS, and why ZFS changes the rules entirely.
How to Increase CPU and RAM Resources for a Virtual Machine in Proxmox VE
Learn how to give a Proxmox VE virtual machine more CPU cores and RAM from the web GUI or the command line, including how CPU and memory hotplug work so you can resize without a reboot.
How to Fix High RAM Usage in Proxmox VE (And What's Actually Normal)
free -h showing 90% used and panicking? Learn why ZFS ARC and KSM make Proxmox VE memory usage look scary, how to tell real pressure from normal caching, and what to actually fix.
How to Configure HugePages for Proxmox VE Virtual Machines (Static and Transparent)
Reduce TLB overhead and get predictable memory latency for databases and DPDK workloads by reserving static HugePages in Proxmox VE, configuring NUMA-aware VMs, and understanding why HugePages and memory ballooning can't be used together.
How Memory Ballooning Works in Proxmox VE (And When to Disable It)
A deep dive into how the virtio-balloon device lets Proxmox VE dynamically resize VM memory, how to configure it via the GUI and qm.conf, and when you should turn it off for databases, PCI passthrough, and SLA-bound workloads.
Tuning ZFS ARC Memory Limits on Proxmox VE Storage Nodes
Learn why ZFS ARC's default memory ceiling causes VM OOM errors on Proxmox hosts, and how to safely cap and persist zfs_arc_max.