What's using my swap?

[JonM]

Hi all,

What's the best way to figure out which processes might be using swap space?

I'm trying to find out why it's being used at all right now... at the moment it looks like I'm using about 60% of my swap space but I've also got 8GB of free memory that isn't being used.

Any advice on finding out what's going on?

thanks,
Jon

 

[sretalla]

Do you run Tautulli?

 

[JonM]

I do! That's a bit of a swap hog?

 

[sretalla]

I noticed that mine is leaking memory since a few weeks back (unfortunately I can't nail down a good version as I only keep 2 weeks of snapshots and rolling back to the oldest seems to still leak, although slower than the current version), so when it gets above 10G, the system seems to push nginx and some other items into swap to give room to the jail (and other stuff).

Have a look at htop and see if tautulli is high on the list after using F6 and selecting M_RESIDENT.

Then check top -w then type o then type swap and Enter to see the swap consumers at the top of that list.

 

[JonM]

Looks like that could be it.... Taut was using around 6Gb memory so does seem like it's leaking.
Odd that it's not moving back into memory from swap with so much free memory lying around though isn't it?

 

[sretalla]

Odd that it's not moving back into memory from swap with so much free memory lying around though isn't it?

I'm not sure that's how swapping works... it will only swap back out if that memory is called upon for use.

 

[hescominsoon]

Hi all,

What's the best way to figure out which processes might be using swap space?

I'm trying to find out why it's being used at all right now... at the moment it looks like I'm using about 60% of my swap space but I've also got 8GB of free memory that isn't being used.

Any advice on finding out what's going on?

thanks,
Jon

what are your system specs? especially storage and ram. also could you post a screenshot of your ram usage as noted above?

 

[JonM]

Hello!

No problem, system is 16TB across 6 WD-Reds with 32GB memory, core i3-6100 running TrueNAS-12.0-U2.1

Swap use has dropped a bit now that I've bounced tautulli