Pagefile.sys Taking Up Too Much Disk Space? Fix it Easily.

1. Immediately reduce it (reboot method)

Do this as local admin (e.g., on a Windows Server or desktop):

1. Open System Properties
   • Press Win + R, type:
     SystemPropertiesAdvanced.exe
     and hit Enter.
   • Go to Advanced tab → Performance → Settings…
   • On the Advanced tab, click Change… under Virtual Memory.
2. Uncheck auto‑manage
   • Uncheck “Automatically manage paging file size for all drives”.
   • Select your C: drive, then choose Custom size.
3. Set much smaller values
   For a 128 GB‑RAM system, a reasonable fixed pagefile is about 16–32 GB total.
   Example:
   • Initial size: 16384
   • Maximum size: 32768
     (i.e., 16 GB min, 32 GB max)
   • Click Set, then OK on all dialogs.
4. Force the shrink via reboot
   • Either:
     • Shut down the machine completely, power it back on, or
     • Reboot once.
   • After boot, Windows will recreate pagefile.sys closer to your new settings.

This should reclaim tens of gigabytes on C:.

---

2. Limit the size long‑term

• Keep it on C: but locked to a fixed range.
  • Do not switch back to “System managed” if you want control; that’s why it grew to 50 GB.
  • Keep “Automatically manage paging file size for all drives” unchecked.
  • Set both Initial and Maximum to the same value (e.g., 16384 MB = 16 GB) if you want it truly fixed.
• Typical sane ranges for 128 GB RAM:
  • Minimum: 8–16 GB
  • Maximum: 16–32 GB
    This is enough for crash dumps and normal memory over‑commit without eating all your drive.
• If you really must reclaim max space:
  • You can drop it as low as 2–4 GB on a 128 GB RAM machine, but that starts to risk issues if a misbehaving app or driver tries to allocate huge virtual memory.

---

3. Optional safety tweaks

• Ensure “Clear paging file at shutdown” is off unless you explicitly need it (it makes shutdown longer).
• Consider if C: is an SSD; on modern SSDs with 128 GB RAM, a 16–32 GB pagefile is fine and protects against crashes without much performance hit.