ArcGIS Server on Windows Server 2022 high disk usage

Question

Has anyone seen unexplained high disk usage with ArcGIS Server 11.1 on Windows Server 2022 Datacenter? This is a standalone server, not federated to any Portals.

Our server monitoring has picked up 2 times where the server storage has spiked to over 90% space used (normal for the registered folders is around 30% used). No new services are being published and service usage is low. No tile cache creation jobs are in progress (this is intended to be an internal basemap server). Web adaptor is on a different machine.

Logging onto the server does not show any large files being created, but File Explorer shows the drive as running out of space. This is resolved by either restarting the main ArcGIS Server service or doing an OS restart.

FentonCheng_-_DIT · Answer

Caching tools are not running.

Last time this happened, WIndirstat found something but I didn't make a note of what was found at that time. I'll need to wait for the next time it happens, seems to be about once a month so far (not Windows Updates, that is handled by WSUS and it wasn't the day those are applied).

Aled Wyn Jones · Answer

@FentonCheng_-_DIT Has Windirstat identified what's consuming the disk space on D: \?

Worth checking that your caching tools aren't mistakenly running (check in Server Manager whether the caching tools have an instance in use).

FentonCheng_-_DIT · Answer

I use WinDirStat for that, should look into TreeSize Free also.

Do temp files wind up in other locations? Server was installed into C, but the arcgisserver directory is on D (also the same drive that has the low disk space warning).