Duncan wrote:
Personally, I'd just go with the default nr_inodes. People with 2 gig or less of real RAM may need to worry about it, especially if they do a lot of parallel makes (tho with 2 gig I'd crimp on parallel makes way more than I do, too, so may not have to, but as I've said before, I'm not sure of the affect at a gig, someone would have to test and see), but with 4 gig and a million inodes by default, I think you should be fine.
I only have 2GB of RAM and have no problem with the defaults. I run two parallel merges - I don't think anybody with a computer this old would run more than that anyway.
I occassionally get swaps, but that is no big deal. In the worst case swapping is no worse than not using tmpfs at all, and in the typical or best cases it is far better. It really is a no-lose scenario. If something leaves junk lying around in /var/tmp then it just gets swapped out and never gets swapped back in - again no worse than if it were written to disk in the first place. Just make sure you have plenty of swap space if your physical RAM is limited.
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