文件i/o统计

-- Description  : Displays the amount of IO for each datafile.
-- Requirements : Access to the v$ views.
-- Call Syntax  : @file_io

SET PAGESIZE 1000

SELECT Substr(d.name,1,50) "File Name",
       f.phyblkrd "Blocks Read",
       f.phyblkwrt "Blocks Writen",
       f.phyblkrd + f.phyblkwrt "Total I/O"
FROM   v$filestat f,
       v$datafile d
WHERE  d.file# = f.file#
ORDER BY f.phyblkrd + f.phyblkwrt DESC;

SET PAGESIZE 18

从Oracle9i开始，可以使用v$segment_statsitic直接找出对象，该脚本的意义不大