When things go wrong, there are more options than the hard reboot.
July 18, 2007
March 14, 2007
Something that’s been bugging me lately is that CRAN doesn’t seem to have recent (ie v2.4+) versions of R ubuntu packages for 64 bit architectures. So I finally bit the bullet and added the debian/ stable/ source path to my sources.list, and voila! Instant goodness. You’re not really supposed to cross-contaminate like this, but I haven’t even broken anything – yet.
Trivial, but annoying.
March 6, 2007
I’ve been having memory issues on my server/cruncher box : available RAM seems to disappear. At first I thought it might be the well-known Firefox memory leaks, so I did a little (unconscious) experiment. I rebooted yesterday and never fired up FF. Today, I notice:
bobo% free -m total used free shared buffers cached Mem: 3943 3673 270 0 161 3253 -/+ buffers/cache: 257 3686 Swap: 6000 110 5889
Something appears to be caching to buggery. It turns out to be the kernel. The trick here is to interpret the second line, which tells you what programs “see” when asking for memory. In this case, it’s 3686M free, so all is well. A little scary there for a second…
I shall have to be a little more sanguine next time.
 dual amd64, 4G RAM, Ubuntu Dapper clean install.