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srkitch
Apprentice
Joined: 26 May 2006
Posts: 183
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 Posted: Thu Aug 24, 2006 3:48 pm Post subject: using tmpfs for emerge? |
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i have been using a tmpfs mounted to /var/tmp/portage for compiling lately and was just wondering a couple of things.
here is my line from fstab dealing with the tmpfs
| Code: | | none /var/tmp/portage tmpfs size=850M,nr_inodes=1M 0 0 |
i ask b/c it seems that when the 850 MB of the tmpfs is used up, it won't use the swap. this leads to all sorts of compile time messages like
"Warning: XX/XX/XXXX file has moved" i'm pretty ssure that's b/c it has used up all of the space and started to overwrite the files, but why won't it use the swap? i even emerged two packes simultaneously and ran $ free in another console only to see that no matter what i did it only used 260 MB of the swap, while there's a full 4 GB available. any ideas? if it won't use the swap, why should i even have it? (ps i have 1024 MB of system RAM)
Last edited by srkitch on Thu Aug 24, 2006 4:11 pm; edited 1 time in total |
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Genone
Retired Dev
Joined: 14 Mar 2003
Posts: 8690
Location: beyond the rim
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| Posted: Thu Aug 24, 2006 3:59 pm Post subject: Re: using tmpfs for emerge? |
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| srkitch wrote: | | i ask b/c it seems that when the 850 MB of the tmpfs is used up, it won't use the swap. |
Right, as you told it to not use more than 850M.
| Quote: | | this leads to all sorts of compile time messages like "Warning: XX/XX/XXXX file has moved" i'm pretty ssure that's b/c it has used up all of the space and started to overwrite the files, |
Nope, if it has used up all memory it will fail with "disk full" errors. |
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srkitch
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Joined: 26 May 2006
Posts: 183
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| Posted: Thu Aug 24, 2006 4:09 pm Post subject: Re: using tmpfs for emerge? |
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| Quote: | | Quote: | | this leads to all sorts of compile time messages like "Warning: XX/XX/XXXX file has moved" i'm pretty ssure that's b/c it has used up all of the space and started to overwrite the files, |
Nope, if it has used up all memory it will fail with "disk full" errors. |
i thought that the tmpfs will be re-used if the file isn't currently being used, i.e. if it uses file A, but later all available "free" space is used and file A is just sitting there, wiuld it write a new file in that space if it isn't being used?
also, should i just up the amount of memory it can use since i have 1GB of RAM? could i let it use the RAM for compiling and use the swap to run the system while its compiling? if i understand right as soon as the emerge process is done that RAM memory is released back to be used for whatever processes may need it, right? |
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chtephan
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Joined: 03 Feb 2004
Posts: 266
Location: Offenburg, Germany
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| Posted: Thu Aug 24, 2006 5:29 pm Post subject: |
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I think the "file has moved" messages are from libtool when it is installing the libraries. Probably because of some sandbox/DISTDIR stuff. They're harmless (actually, ever compiled evolution? You sometimes get the impression that these warnings are taking up 50% of the total output  ). |
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markborg
n00b
Joined: 10 Oct 2005
Posts: 12
Location: Mississauga, Canada
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| Posted: Wed Feb 14, 2007 10:26 pm Post subject: Tmpfs for emerge still gets used up |
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Dont know if this is still being followed, but I also use up all the tmpfs space. Is there features to NOT use if tmp is in ram?
Seems like whenever I use tmpfs, eventually compiles fail & I have to go back to disk based tmp. |
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Simius
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Joined: 26 Oct 2002
Posts: 219
Location: Budapest, Hungary
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| Posted: Thu Feb 15, 2007 9:20 am Post subject: |
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For me tmpfs is mounted on everything that ends wih /tmp, and it works great for 99% of emerges.
And if i want to compile monsters like openoffice, I just umount /var/tmp, and bind mount a temp dir in /home to /var/tmp...
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