On Friday, July 4, 2014 4:39:13 PM UTC-4, Nicolas M. Thiéry wrote: > > ATA LITEONIT LCT-256. No idea if it's good or not (it's infinitely > better than on my previous non SSD laptop :-) ). I would indeed have > expected to most of the sage directory is loaded in memory cache > anyway (right now, I have 4Go unused), but the monitor still shows a > peak of disk access. Oh well. Thanks for your suggestions!
Should be ok. For me, "sage -b" operates almost entirely from memory. So perhaps 4gb of unused ram isn't sufficient to pull everything into cache (also is it really free; is there enough swap?). Using strace, I see that "sage -b" without changes reads 2337854838 bytes and writes 11530749 bytes (including cached read/writes). The write part is negligable, but maybe there is a reason why you can't cache 2.4gb for reading. Another data point, really every read is coming out of the cache: $ iostat && sage -b && iostat ... Device: tps kB_read/s kB_wrtn/s kB_read kB_wrtn sda 6.93 67.61 79.28 5264813 6173796 ... Updating Cython code.... Finished Cythonizing, time: 2.62 seconds. Discovering Python source code.... Discovered Python source, time: 0.02 seconds. Cleaning up stale installed files.... - cleaning /home/vbraun/Code/sage/local/lib/python2.7/site-packages - cleaning /home/vbraun/Code/sage/local/lib/site-python - cleaning /home/vbraun/Code/sage/src/build/lib.linux-x86_64-2.7 Finished cleaning, time: 0.07 seconds. running install running build running build_py running build_ext Executing 0 commands (using 1 thread) Time to execute 0 commands: 0.00 seconds. Total time spent compiling C/C++ extensions: 0.05 seconds. running install_lib ... Device: tps kB_read/s kB_wrtn/s kB_read kB_wrtn sda 6.93 67.61 79.28 5264813 6173804 -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/sage-devel. For more options, visit https://groups.google.com/d/optout.
