如何清除掉归档日志文件？

[xcwwebmaster]

昨天因归档日志过大，超过了最大值导致数据库报错，根据文档提示，我增大了DB_RECOVERY_FILE_DEST_SIZE的值，请问一下，我能否清除掉归档日志，该如何清除？文档提示，要用rman清除，我该怎样操作？
ORA-19809: limit exceeded for recovery files
Cause: The limit for recovery files specified by the DB_RECOVERY_FILE_DEST_SIZE was exceeded.
Action: The error is accompanied by 19804. See message 19804 for further details.
ORA-19804: cannot reclaim string bytes disk space from string limit
Cause: Oracle cannot reclaim disk space of specified bytes from the DB_RECOVERY_FILE_DEST_SIZE limit.
Action: There are five possible solutions: 1) Take frequent backup of recovery area using RMAN. 2) Consider changing RMAN retention policy. 3) Consider changing RMAN archivelog deletion policy. 4) Add disk space and increase DB_RECOVERY_FILE_DEST_SIZE. 5) Delete files from recovery area using RMAN.

[ashzs]

如果已经有当前的完整备份了，就把归档日志删掉（直接删除文件即可）！

如果想备份：

下面的脚本备份归档日志：

RMAN> run {
2> allocate channel dev1 type disk;
3> backup
4> format '/ora/backups/log_t%t_s%s_p%p'
5> (archivelog all);
6> release channel dev1;
7> }

　　下面的脚本归档日志从# 90 to 100：

RMAN> run {
2> allocate channel dev1 type disk;
3> backup
4> format '/ora/backups/log_t%t_s%s_p%p'
5> (archivelog from logseq=90 until logseq=100 thread 1);
6> release channel dev1;
7> }

　　下面的脚本备份在两天内产生的归档日志，在备份完成后会自动删除归档日志。如果备份失败，归档日志不会被删除。

RMAN> run {
2> allocate channel dev1 type disk;
3> backup
4> format '/oracle/backups/log_t%t_s%s_p%p'
5> (archivelog from time 'sysdate-2' all delete input);
6> release channel dev1;
7> }

[lcai000]

请问我自动归档打开了，路径也设好了，为什么看不到归档文件呀？