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Stefan de Konink <skinkie@××××××.nl> posted 47928523.2080203@××××××.nl, |
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excerpted below, on Sun, 20 Jan 2008 00:17:55 +0100: |
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> ...very offtopic but how are you all compiling stuff like firefox on a |
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> ram disk. Or is 8GB of ram very cheap suddenly? |
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Well, tmpfs is swap-backed if necessary. That's one of its strengths. |
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And no, 8 gig of at least registered memory (what my Opterons use) isn't |
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cheap -- I paid >$1000 for mine a year or so ago, but it sure is nice, |
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combined with a dual dual-core system (Opteron 290s, upgraded ~4 months |
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ago from 242s). |
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MAKEOPTS="-j20 -l12" keeps things from getting too out of hand. It'll |
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sometimes use 3 gigs or so of app memory (and about the same tmpfs it |
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appears), but not too bad. I ran -j (unlimited jobs) for awhile, and |
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it's fun to see the jobs climb to several hundred, but even with 16 gigs |
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4-way striped swap, the system goes draggy at that and >10 gigs into |
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swap. Keeping it to ~12 jobs means responsiveness stays reasonable, at |
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least with the new 2.6.24 user based scheduling and the portage user kept |
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to the same or half the share of my regular user. Swap seldom gets used, |
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and if it does, it's only a few megs of the apps I don't use much anyway |
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(/proc/sys/vm/swappiness set to 100 so it flushes apps, not cache, to |
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swap, as apps and the main system are on raid-6 so only two-way striped |
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while swap is 4-way striped). |
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Nice system to run Gentoo on. =8^) Using ccache, recompiling the updated |
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kde4-svn daily is only ~2 hours or so, during which the system remains |
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pleasantly usable. =8^) |
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-- |
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Duncan - List replies preferred. No HTML msgs. |
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"Every nonfree program has a lord, a master -- |
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and if you use the program, he is your master." Richard Stallman |
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-- |
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