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I am afraid this is an ".. it depends" question. |
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If you work with large images or data sets, swap can be really handy. |
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If you are doing a little programming, web browsing, reading email you |
| 5 |
will *probably* be ok, but why risk it? |
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|
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I have a 32gb ram in a master server for an mfs filesystem - it normally |
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sits at about 5GB of ram - however it can go well over 32Gb into swap at |
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times - the first machine I tried it with only had 4gb ram and crashed |
| 10 |
when it filled the ram, and 8g swap taking the test file system with it |
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- its now production so I am not going to risk it by underprovisioning |
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swap. My 32Gb desktop is not using any swap at the moment ... but it |
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has used it at times. |
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|
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So, yes its quite likely you wont use swap - but if you do something |
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that needs it, it can help avoid a very messy crash. |
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|
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Swap is slow, but if you actually need it - its probably critical that |
| 19 |
you have it! Unless you are really short of disk space, treat it as |
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insurance :) |
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|
| 22 |
Look into using swapfiles instead of partitions for flexibility, and the |
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sysctl values of "vm.swappiness" and "vm.vfs_cache_pressure" to manage |
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swap usage (you can set to not use swap until it really has to - some |
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have seen the kernel being too eager to swap out causing slowdowns, |
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though you can make it go in the other direction and "thrash" when it |
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actually needs to use swap if you go to far. The default kernel swap |
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mechanism isn't really that bad! |
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|
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So yes, most of my machines don't need swap *right now* and swap looks |
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like its not being used so it could be removed, but I cant guarantee |
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that they never will, and having years of experience using swap I |
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recommend that its better to be cautious and survive :) |
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BillK |
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|
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|
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On 2/5/20 3:50 am, Raphael MD wrote: |
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> Hello! |
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> |
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> Could I turn my Linux swap off. |
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> I have 32 GB of RAM memory, I suppose my system don’t need swap, |
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> because I’vea lot of RAM, is this true? |
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> |
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> Thanks |
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> -- |
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> M.S. Raphael Mejias Dias |
| 48 |
> Nuclear Engineer | Reactors |
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> |
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> Secure e-mail: raphael.mejias.dias@××××××××××.com |
| 51 |
> <mailto:raphael.mejias.dias@××××××××××.com> |
| 52 |
> PGP Key for raphaxx@×××××.com <mailto:raphaxx@×××××.com>: |
| 53 |
> https://pgp.mit.edu/pks/lookup?op=get&search=0x87BC5A746072F951 |
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