这个脚本可以用来分析当前重做日志文件(redo logfile)已被用到了什么位置(position)、还剩余多少空间和已使用的百分比:
set linesize 200 pagesize 1400;
select le.leseq "Current log sequence No",100 * cp.cpodr_bno / le.lesiz "Percent Full",(cpodr_bno - 1) * 512 "bytes used exclude header",le.lesiz * 512 - cpodr_bno * 512 "Left space",le.lesiz *512 "logfile size"from x$kcccp cp, x$kccle lewhere LE.leseq = CP.cpodr_seqand bitand(le.leflg, 24) = 8;
Sample:
SQL> set linesize 200 pagesize 1400;
SQL> select le.leseq "Current log sequence No",2 100 * cp.cpodr_bno / le.lesiz "Percent Full",3 (cpodr_bno - 1) * 512 "bytes used exclude header",4 le.lesiz * 512 - cpodr_bno * 512 "Left space",5 le.lesiz *512 "logfile size"6 from x$kcccp cp, x$kccle le7 where LE.leseq = CP.cpodr_seq8 and bitand(le.leflg, 24) = 8;Current log sequence No Percent Full bytes used exclude header Left space logfile size
----------------------- ------------ ------------------------- ---------- ------------189 90.7612305 95169536 9687552 104857600/* 如上结果显示当前重做日志号为189，使用量百分比是90.7%当前日志被使用到了95169536+512 bytes(重做日志文件头)的位置，还剩余9687552 bytes的空间，该重做日志的总大小为104857600=100MB
*/
：目录)
