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Am 21.07.2013 16:42, schrieb Peter Wilmott: |
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> On 21/07/13 15:31, luis jure wrote: |
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>> OK, now i have my system successfully installed and running on my new |
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>> SSD. |
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>> now i have to decide what to do with the rest of the disk (it's a 256MB |
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>> samsung). |
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>> |
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>> the first big question is: what about swap? i found some web pages |
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>> (perhaps old) stating that it's not wise to put swap on the SSD |
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>> because of |
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>> all the read/writes. but apparently from what i read on the recent |
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>> thread on this list, that shouldn't be much of a concern now. |
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>> |
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>> i also read somewhere that if you have swap on the SSD and want to avoid |
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>> unnecessary read/writes, you can reduce swappiness. i have 12GB RAM and i |
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>> think normally i don't really need swap space on disk, so i thought that |
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>> could be a good idea. |
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>> |
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>> so what i'm planning to do now is: |
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>> |
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>> - put swap on the SSD |
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>> - reduce swappiness |
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>> - put /var/tmp/portage on tmpfs |
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>> |
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>> so, do you guys think that's a good setup? |
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>> |
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> TBH, unless you are really stressing your RAM usage (Lots of VMs or Java |
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> applications, stuff like that) I'd go without swap. I've been running |
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> swapless on 8GB of RAM for a number of years now with no issues. |
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> |
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> As for /var/tmp/portage on tmpfs, this is fine 95% of the time, however |
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> even with ~2GB I allocate some packages (Chromium, LibreOffice, ect) |
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> will fail to compile due to lack of space. In these cases I just |
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> un-mount /var/tmp/portage, do the compile on the disk, and then re-mount |
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> it. |
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> |
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|
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Portage can do that for you for packages you know to need that much space: |
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markus@Nanga-Parbat ~ $ cat /etc/portage/env/notmpfs |
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PORTAGE_TMPDIR="/var/tmp_notmpfs" |
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[Fr 26.07.13 22:06 CEST][pts/2][x86_64/linux-gnu/3.10.1-gentoo][5.0.2] |
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markus@Nanga-Parbat ~ $ cat /etc/portage/package.env |
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www-client/firefox notmpfs |
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[Fr 26.07.13 22:06 CEST][pts/2][x86_64/linux-gnu/3.10.1-gentoo][5.0.2] |
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markus@Nanga-Parbat ~ $ mount | grep /var/tmp |
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/dev/mapper/Nanga--Parbat--SSD-system--var--tmp_notmpfs on |
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/var/tmp_notmpfs type btrfs (rw,noatime,ssd,autodefrag,compress=lzo) |
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none on /var/tmp type tmpfs (rw,size=6350m) |
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|
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(Firefox is still in there from my pgo-builds, I should remove that now :D) |
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Also: |
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markus@Nanga-Parbat ~ $ free -h |
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total used free shared buffers cached |
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Mem: 15G 12G 3,6G 0B 336M 6,0G |
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-/+ buffers/cache: 5,7G 9,9G |
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Swap: 0B 0B 0B |
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never had any problems without swap, since i got more than 4GB of RAM ;) |
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Regards, |
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Markus |
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