SG2100 128GB SSD and Swap

[JonathanLee]

@stephenw10 is it safe to leave it on? It is on the SSD. I am a bit confused with this as why @jimp recommend using a usb for swap. Is that because that is recommended over using MMC but I have a SSD and that is ok to use? Is it essentially extra memory for only crash reports? Or let’s say I use clamAV and enabled the monster signature file would it overflow into the swap for loading? Kind of like Disk based RAM? It shouldn’t use it all the time right? Again with an SSD that can withstand abuse is it ok? 6GB swap, I only have 4GB memory and I can only access around 3.5 of it.

[JonathanLee]

@stephenw10 @jimp

It is on the SSD working :)

Thanks,

[stephenw10]

Yeah it's safe to leave enabled on an SSD. But, as you say, it should never get used anyway.

We have recommended using a USB drive for SWAP because it's easy to add. In your case it was trivial because the SWAP partition already existed. But on a system with emmc only where there is no SWAP then re-partitioning it to add swap is complex. Easier to reinstall. Or just use a USB drive temporarily.

[The Party of Hell No]

@stephenw10
Okay Stephen riddle me this... yesterday I was able to get the swap file to show in the gui under system information by editing the fstab to correct the location of the swap file partition. Today I see my amount of swap is 1024 and "gpart show" says I have 1.06 or "freebsd-swap (1.0G)." What kind of trickery is this!

[The Party of Hell No]

This post is deleted!

[stephenw10]

Unclear what your question is? You appear to have a 1GB SWAP partition and it's configured correctly if it appears in the gui.

[The Party of Hell No]

@stephenw10
Sorry, I was not clear... the gui, system Information says the swap file is 1024mb but the swap file according to gpart is 1.0g. My thinking is these two should match? Am I wrong about that?

[JonathanLee]

@The-Party-of-Hell-No

Your in luck that is 1GB

64MB X 2 = 128MB a fourth of a 1GB

128MB X 2 = 512MB or half a 1GB

512 X 2 = 1024MB or Also known as 1GB :)

[The Party of Hell No]

@JonathanLee said in SG2100 128GB SSD and Swap:

@The-Party-of-Hell-No

Your in luck that is 1GB

64MB X 2 = 128MB a fourth of a 1GB

128MB X 2 = 512MB or half a 1GB

512 X 2 = 1024MB or Also known as 1GB :)

Ahh shit, I sound like a bumpkin... never mind.
Hey could someone upvote me so I am not stopped from submitting posts because I have to wait 140 seconds as a new user.

[stephenw10]

Your rep is over 5 now you should be good.

[The Party of Hell No]

@stephenw10 Thank you.

[JonathanLee]

Quick Question @stephenw10 @jimp

I am testing SWAP on a USB drive and I used gpart to create a swap partition on the drive, I have it referenced and it is working...

But it doesn't show usage here...

But it does here

This all seemed to math up with the SSD use

Geom name: ada0
modified: false
state: OK
fwheads: 16
fwsectors: 63
last: 250069679
first: 1
entries: 4
scheme: MBR
Providers:
1. Name: ada0s1
   Mediasize: 272629760 (260M)
   Sectorsize: 512
   Stripesize: 0
   Stripeoffset: 512
   Mode: r0w0e0
   efimedia: HD(1,MBR,00000000,0x1,0x82000)
   rawtype: 239
   length: 272629760
   offset: 512
   type: efi
   index: 1
   end: 532480
   start: 1
2. Name: ada0s2
   Mediasize: 67108864 (64M)
   Sectorsize: 512
   Stripesize: 0
   Stripeoffset: 272630272
   Mode: r0w0e0
   efimedia: HD(2,MBR,00000000,0x82001,0x20000)
   rawtype: 11
   length: 67108864
   offset: 272630272
   type: fat32
   index: 2
   end: 663552
   start: 532481
3. Name: ada0s3
   Mediasize: 127695937024 (119G)
   Sectorsize: 512
   Stripesize: 0
   Stripeoffset: 339739136
   Mode: r1w1e2
   efimedia: HD(3,MBR,00000000,0xa2001,0xedda2af)
   attrib: active
   rawtype: 165
   length: 127695937024
   offset: 339739136
   type: freebsd
   index: 3
   end: 250069679
   start: 663553
Consumers:
1. Name: ada0
   Mediasize: 128035676160 (119G)
   Sectorsize: 512
   Mode: r1w1e3

Geom name: ada0s3
modified: false
state: OK
fwheads: 16
fwsectors: 63
last: 249406126
first: 0
entries: 8
scheme: BSD
Providers:
1. Name: ada0s3a
   Mediasize: 120590425600 (112G)
   Sectorsize: 512
   Stripesize: 0
   Stripeoffset: 339747328
   Mode: r1w1e1
   rawtype: 27
   length: 120590425600
   offset: 8192
   type: freebsd-zfs
   index: 1
   end: 235528190
   start: 16
2. Name: ada0s3b
   Mediasize: 7105150976 (6.6G)
   Sectorsize: 512
   Stripesize: 0
   Stripeoffset: 120930172928
   Mode: r0w0e0
   rawtype: 1
   length: 7105150976
   offset: 120590433792
   type: freebsd-swap
   index: 2
   end: 249405438
   start: 235528191
Consumers:
1. Name: ada0s3
   Mediasize: 127695937024 (119G)
   Sectorsize: 512
   Stripesize: 0
   Stripeoffset: 339739136
   Mode: r1w1e2

Just to confirm this is correct right I can hear the drive running seeking etc

I checked the ada0 made sure it would work unplugged it to make use it was the right drive name also

[JonathanLee]

Disregard I spoke to soon...

[JonathanLee]

@stephenw10 said in SG2100 128GB SSD and Swap:

/dev/ada0s3b

With use of the drive "da0" in place of "/dev/ada0s3b how can I still use the SWAP and have coredumps generate?

How can I still use the external drive for swap and access core dumps in /var/crashes?

[JonathanLee]

I need to use

/dev/ada0s3b for dump

and
/dev/da0 for swapping

can I separate them?

[stephenw10]

Not easily. Not as far as I know at least.