Why does my swap keep decreasing?

[Amsoil_Jim]

My system reports show my system started with 14 GB of Swap, then about a year ago it dropped to 6 GB and now its down to 4GB. Seems to have dropped when I started using the 11.2 Betas.
Is there a way to get it back up to the original 16 GB? Is it a concern that it has been dropping by itself?
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Edit: graph would show i'm wrong about when the swap initially dropped when started using 11.2 betas

 

[m0nkey_]

For a start, swap shouldn't be used. If you're using swap then you simply don't have enough RAM. Add more RAM to your system.

As of 11.1-U4, swap is now configured as mirrors instead of a stripe. This is what you're seeing.

 

[Amsoil_Jim]

For a start, swap shouldn't be used. If you're using swap then you simply don't have enough RAM. Add more RAM to your system.

As of 11.1-U4, swap is now configured as mirrors instead of a stripe. This is what you're seeing.

well having only 6x3TB drives, I think the 198 GB of ram should be more than enough, but at you can see from the graphs, swap has been being used.

 

[anodos]

Are you using VMs or jails?

 

[Amsoil_Jim]

Are you using VMs or jails?

Yes, just installed a Ubuntu vm with Ombi running on it.
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[toadman]

For a start, swap shouldn't be used. If you're using swap then you simply don't have enough RAM. Add more RAM to your system.

Generally yes, add RAM. Though on 11.1 a few people have seen some swapping even with generous amounts of RAM. Some threads here on slight tuning to eliminate it. It looks like an issue of not being able to evac the ARC quickly enough in the case of memory pressure.

 

[anodos]

Yes, just installed a Ubuntu vm with Ombi running on it.
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Perhaps try tuning down your max arc size to leave space for your VMs.

 

[Amsoil_Jim]

Perhaps try tuning down your max arc size to leave space for your VMs.

I’ll give it a try.