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Files become randomly "missing" To Arrs/Plex - even though they exist on disk (multiple re-scans causes them to show back up)

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  • Community Expert

no, no "missings" (yet) here.

But then I have 128G mostly unused RAM and "only" ~200000 Files.

Maybe he should take a look at plugins like "cache dir" ?

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On 4/30/2026 at 10:08 AM, trurl said:

Does everyone experiencing these problems have extremely large media libraries? Maybe something is running out of memory.

I mean I'm at 53.5 TB on this server and right around there on another server (that does not experience these issues). I have 32 GB ram, would that show up in diags? If I'm running out of memory? My other server that does NOT experience this has Plex on a separate PVE node and is serving the shares over the network.

On 4/30/2026 at 10:11 AM, MAM59 said:

no, no "missings" (yet) here.

But then I have 128G mostly unused RAM and "only" ~200000 Files.

Maybe he should take a look at plugins like "cache dir" ?

I am ready to try anything. I'm at 32 gb ram but didn't know if cache dir is required or else you get issues like this?

  • Community Expert
4 hours ago, ksp said:

I'm at 32 gb ram but didn't know if cache dir is required or else you get issues like this

No, I've meant it the other way round.

IF you have cache dirs installed AND you are low on memory, THEN there might be a chance of "lost files" (not actually lost on disk but not shown in "dir-like" commands because the cache was full and the file entry did not make it into the list anymore)

So my advice was intended to tell you "if you are running 'cache dirs', deinstall it and see if things change".

"cache dir" speeds things up a lot, so many people are using it.

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