Fastest & most flexible way to chart over 2 million rows of flat file data?
问题 I'm collecting some system data in a flatfile, which has this format: YYYY-MM-DD-HH24:MI:SS DD1 DD2 DD3 DD4 Where DD1-DD4 are four items of data. An example of the file is this: 2011-02-01-13:29:53 16 8 7 68 2011-02-01-13:29:58 13 8 6 110 2011-02-01-13:30:03 26 25 1 109 2011-02-01-13:30:08 13 12 1 31 2011-02-01-13:30:14 192 170 22 34 2011-02-01-13:30:19 16 16 0 10 2011-02-01-13:30:24 137 61 76 9 2011-02-01-13:30:29 452 167 286 42 2011-02-01-13:30:34 471 177 295 11 2011-02-01-13:30:39 502 192