ORA-00257
来自官方文档的解释
ORA-00257: archiver error. Connect internal only, until freed.Cause: The archiver process received an error while trying to archive a redo log. If the problem is not resolved soon, the database will stop executing transactions. The most likely cause of this message is the destination device is out of space to store the redo log file.
Action: Check archiver trace file for a detailed description of the problem. Also verify that the device specified in the initialization parameter ARCHIVE_LOG_DEST is set up properly for archiving.
现象：切换用户时，出现错误
SYS@ orcl>conn scott/tiger ERROR: ORA-00257: archiver error. Connect internal only, until freed. Warning: You are no longer connected to ORACLE.解决方法：缩减归档日志
1.使用sysdba用户登录查看archive log 存放位置：
@ >conn / as sysdba Connected. SYS@ orcl>show parameter log_archive_dest; NAME TYPE VALUE ------------------------------------ ----------- ------------------------------ log_archive_dest string log_archive_dest_1 string log_archive_dest_10 string log_archive_dest_2 string log_archive_dest_3 string log_archive_dest_4 string log_archive_dest_5 string log_archive_dest_6 string log_archive_dest_7 string log_archive_dest_8 string log_archive_dest_9 string NAME TYPE VALUE ------------------------------------ ----------- ------------------------------ log_archive_dest_state_1 string enable log_archive_dest_state_10 string enable log_archive_dest_state_2 string enable log_archive_dest_state_3 string enable log_archive_dest_state_4 string enable log_archive_dest_state_5 string enable log_archive_dest_state_6 string enable log_archive_dest_state_7 string enable log_archive_dest_state_8 string enable log_archive_dest_state_9 string enable2.一般VALUE为空时，可以用archive log list;检查一下归档目录和log sequence：
SYS@ orcl>archive log list Database log mode Archive Mode Automatic archival Enabled Archive destination USE_DB_RECOVERY_FILE_DEST Oldest online log sequence 28 Next log sequence to archive 28 Current log sequence 303.检查flash recovery area的使用情况
SYS@ orcl>select * from v$flash_recovery_area_usage; FILE_TYPE PERCENT_SPACE_USED PERCENT_SPACE_RECLAIMABLE NUMBER_OF_FILES ------------ ------------------ ------------------------- --------------- CONTROLFILE 0 0 0 ONLINELOG 0 0 0 ARCHIVELOG 63.97 0 27 BACKUPPIECE 34.23 .07 8 IMAGECOPY 0 0 0 FLASHBACKLOG 0 0 0 6 rows selected.4.计算flash recovery area已经占用的空间：达到2.946GB
SYS@ orcl>select sum(percent_space_used)*3/100 from v$flash_recovery_area_usage;
SUM(PERCENT_SPACE_USED)*3/100
-----------------------------
2.9465.查询闪回空间，发现只有2G，超过了规定值。
SYS@ orcl>show parameter recover
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
db_recovery_file_dest string /u01/app/oracle/flash_recovery
_area
db_recovery_file_dest_size big integer 2G
recovery_parallelism integer 06.登陆RMAN，校验归档日志
[oracle@oracle ~]$ rman target / Recovery Manager: Release 10.2.0.1.0 - Production on Sun Aug 10 10:25:49 2014 Copyright (c) 1982, 2005, Oracle. All rights reserved. connected to target database: ORCL (DBID=1365770982) RMAN> crosscheck archivelog all; using target database control file instead of recovery catalog allocated channel: ORA_DISK_1 channel ORA_DISK_1: sid=214 devtype=DISK validation succeeded for archived log archive log filename=/u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_05/o1_mf_1_1_9vgn0lkz_.arc recid=25 stamp=852109774 validation succeeded for archived log archive log filename=/u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_12/o1_mf_1_2_9w2ksx8y_.arc recid=26 stamp=852762829 validation succeeded for archived log archive log filename=/u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_12/o1_mf_1_3_9w2o7pfw_.arc recid=28 stamp=852766376 validation succeeded for archived log archive log filename=/u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_12/o1_mf_1_4_9w2o8ggy_.arc recid=27 stamp=852766373 validation succeeded for archived log archive log filename=/u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_12/o1_mf_1_5_9w2ocq0d_.arc recid=29 stamp=852766464 validation succeeded for archived log archive log filename=/u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_12/o1_mf_1_6_9w2om4rs_.arc recid=30 stamp=852766695 validation succeeded for archived log archive log filename=/u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_13/o1_mf_1_7_9w46xq2m_.arc recid=31 stamp=852817213 validation succeeded for archived log archive log filename=/u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_13/o1_mf_1_8_9w46y8cs_.arc recid=32 stamp=852817231 validation succeeded for archived log archive log filename=/u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_13/o1_mf_1_9_9w46ytcp_.arc recid=33 stamp=852817247 validation succeeded for archived log archive log filename=/u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_13/o1_mf_1_10_9w46z760_.arc recid=34 stamp=852817260 validation succeeded for archived log archive log filename=/u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_13/o1_mf_1_11_9w46zm03_.arc recid=35 stamp=852817269 validation succeeded for archived log archive log filename=/u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_13/o1_mf_1_12_9w46zw3l_.arc recid=36 stamp=852817279 validation succeeded for archived log archive log filename=/u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_13/o1_mf_1_13_9w4706pg_.arc recid=37 stamp=852817291 validation succeeded for archived log archive log filename=/u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_13/o1_mf_1_14_9w472ng0_.arc recid=38 stamp=852817369 validation succeeded for archived log archive log filename=/u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_13/o1_mf_1_15_9w472yfm_.arc recid=39 stamp=852817379 validation succeeded for archived log archive log filename=/u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_13/o1_mf_1_16_9w473b2h_.arc recid=40 stamp=852817389 validation succeeded for archived log archive log filename=/u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_13/o1_mf_1_17_9w473pl7_.arc recid=41 stamp=852817400 validation succeeded for archived log archive log filename=/u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_13/o1_mf_1_18_9w4746d0_.arc recid=42 stamp=852817417 validation succeeded for archived log archive log filename=/u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_13/o1_mf_1_19_9w474n5v_.arc recid=43 stamp=852817430 validation succeeded for archived log archive log filename=/u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_13/o1_mf_1_20_9w4756ol_.arc recid=44 stamp=852817449 validation succeeded for archived log archive log filename=/u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_13/o1_mf_1_21_9w475mlt_.arc recid=45 stamp=852817463 validation succeeded for archived log archive log filename=/u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_13/o1_mf_1_22_9w4760bb_.arc recid=46 stamp=852817474 validation succeeded for archived log archive log filename=/u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_13/o1_mf_1_23_9w476dgr_.arc recid=47 stamp=852817487 validation succeeded for archived log archive log filename=/u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_13/o1_mf_1_24_9w476w0y_.arc recid=48 stamp=852817503 validation succeeded for archived log archive log filename=/u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_13/o1_mf_1_25_9w477dwb_.arc recid=49 stamp=852817521 validation succeeded for archived log archive log filename=/u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_13/o1_mf_1_26_9w477r7x_.arc recid=50 stamp=852817530 validation succeeded for archived log archive log filename=/u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_13/o1_mf_1_27_9w4784v2_.arc recid=51 stamp=852817543 Crosschecked 27 objects7.删除过期的日志，因为是测试环境，这里采取删除前一天的归档日志。
RMAN> delete archivelog until time 'sysdate-1'; released channel: ORA_DISK_1 allocated channel: ORA_DISK_1 channel ORA_DISK_1: sid=214 devtype=DISK List of Archived Log Copies Key Thrd Seq S Low Time Name ------- ---- ------- - --------- ---- 25 1 1 A 29-JUN-14 /u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_05/o1_mf_1_1_9vgn0lkz_.arc 26 1 2 A 05-JUL-14 /u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_12/o1_mf_1_2_9w2ksx8y_.arc 28 1 3 A 12-JUL-14 /u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_12/o1_mf_1_3_9w2o7pfw_.arc 27 1 4 A 12-JUL-14 /u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_12/o1_mf_1_4_9w2o8ggy_.arc 29 1 5 A 12-JUL-14 /u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_12/o1_mf_1_5_9w2ocq0d_.arc 30 1 6 A 12-JUL-14 /u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_12/o1_mf_1_6_9w2om4rs_.arc 31 1 7 A 12-JUL-14 /u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_13/o1_mf_1_7_9w46xq2m_.arc 32 1 8 A 13-JUL-14 /u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_13/o1_mf_1_8_9w46y8cs_.arc 33 1 9 A 13-JUL-14 /u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_13/o1_mf_1_9_9w46ytcp_.arc 34 1 10 A 13-JUL-14 /u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_13/o1_mf_1_10_9w46z760_.arc 35 1 11 A 13-JUL-14 /u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_13/o1_mf_1_11_9w46zm03_.arc 36 1 12 A 13-JUL-14 /u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_13/o1_mf_1_12_9w46zw3l_.arc 37 1 13 A 13-JUL-14 /u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_13/o1_mf_1_13_9w4706pg_.arc 38 1 14 A 13-JUL-14 /u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_13/o1_mf_1_14_9w472ng0_.arc 39 1 15 A 13-JUL-14 /u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_13/o1_mf_1_15_9w472yfm_.arc 40 1 16 A 13-JUL-14 /u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_13/o1_mf_1_16_9w473b2h_.arc 41 1 17 A 13-JUL-14 /u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_13/o1_mf_1_17_9w473pl7_.arc 42 1 18 A 13-JUL-14 /u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_13/o1_mf_1_18_9w4746d0_.arc 43 1 19 A 13-JUL-14 /u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_13/o1_mf_1_19_9w474n5v_.arc 44 1 20 A 13-JUL-14 /u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_13/o1_mf_1_20_9w4756ol_.arc 45 1 21 A 13-JUL-14 /u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_13/o1_mf_1_21_9w475mlt_.arc 46 1 22 A 13-JUL-14 /u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_13/o1_mf_1_22_9w4760bb_.arc 47 1 23 A 13-JUL-14 /u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_13/o1_mf_1_23_9w476dgr_.arc 48 1 24 A 13-JUL-14 /u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_13/o1_mf_1_24_9w476w0y_.arc 49 1 25 A 13-JUL-14 /u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_13/o1_mf_1_25_9w477dwb_.arc 50 1 26 A 13-JUL-14 /u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_13/o1_mf_1_26_9w477r7x_.arc 51 1 27 A 13-JUL-14 /u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_13/o1_mf_1_27_9w4784v2_.arc Do you really want to delete the above objects (enter YES or NO)? y deleted archive log archive log filename=/u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_05/o1_mf_1_1_9vgn0lkz_.arc recid=25 stamp=852109774 deleted archive log archive log filename=/u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_12/o1_mf_1_2_9w2ksx8y_.arc recid=26 stamp=852762829 deleted archive log archive log filename=/u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_12/o1_mf_1_3_9w2o7pfw_.arc recid=28 stamp=852766376 deleted archive log archive log filename=/u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_12/o1_mf_1_4_9w2o8ggy_.arc recid=27 stamp=852766373 deleted archive log archive log filename=/u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_12/o1_mf_1_5_9w2ocq0d_.arc recid=29 stamp=852766464 deleted archive log archive log filename=/u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_12/o1_mf_1_6_9w2om4rs_.arc recid=30 stamp=852766695 deleted archive log archive log filename=/u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_13/o1_mf_1_7_9w46xq2m_.arc recid=31 stamp=852817213 deleted archive log archive log filename=/u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_13/o1_mf_1_8_9w46y8cs_.arc recid=32 stamp=852817231 deleted archive log archive log filename=/u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_13/o1_mf_1_9_9w46ytcp_.arc recid=33 stamp=852817247 deleted archive log archive log filename=/u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_13/o1_mf_1_10_9w46z760_.arc recid=34 stamp=852817260 deleted archive log archive log filename=/u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_13/o1_mf_1_11_9w46zm03_.arc recid=35 stamp=852817269 deleted archive log archive log filename=/u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_13/o1_mf_1_12_9w46zw3l_.arc recid=36 stamp=852817279 deleted archive log archive log filename=/u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_13/o1_mf_1_13_9w4706pg_.arc recid=37 stamp=852817291 deleted archive log archive log filename=/u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_13/o1_mf_1_14_9w472ng0_.arc recid=38 stamp=852817369 deleted archive log archive log filename=/u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_13/o1_mf_1_15_9w472yfm_.arc recid=39 stamp=852817379 deleted archive log archive log filename=/u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_13/o1_mf_1_16_9w473b2h_.arc recid=40 stamp=852817389 deleted archive log archive log filename=/u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_13/o1_mf_1_17_9w473pl7_.arc recid=41 stamp=852817400 deleted archive log archive log filename=/u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_13/o1_mf_1_18_9w4746d0_.arc recid=42 stamp=852817417 deleted archive log archive log filename=/u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_13/o1_mf_1_19_9w474n5v_.arc recid=43 stamp=852817430 deleted archive log archive log filename=/u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_13/o1_mf_1_20_9w4756ol_.arc recid=44 stamp=852817449 deleted archive log archive log filename=/u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_13/o1_mf_1_21_9w475mlt_.arc recid=45 stamp=852817463 deleted archive log archive log filename=/u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_13/o1_mf_1_22_9w4760bb_.arc recid=46 stamp=852817474 deleted archive log archive log filename=/u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_13/o1_mf_1_23_9w476dgr_.arc recid=47 stamp=852817487 deleted archive log archive log filename=/u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_13/o1_mf_1_24_9w476w0y_.arc recid=48 stamp=852817503 deleted archive log archive log filename=/u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_13/o1_mf_1_25_9w477dwb_.arc recid=49 stamp=852817521 deleted archive log archive log filename=/u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_13/o1_mf_1_26_9w477r7x_.arc recid=50 stamp=852817530 deleted archive log archive log filename=/u01/app/oracle/flash_recovery_area/ORCL/archivelog/2014_07_13/o1_mf_1_27_9w4784v2_.arc recid=51 stamp=852817543 Deleted 27 objects8.再次查看闪回空间的情况
SYS@ orcl>select * from v$flash_recovery_area_usage; FILE_TYPE PERCENT_SPACE_USED PERCENT_SPACE_RECLAIMABLE NUMBER_OF_FILES ------------ ------------------ ------------------------- --------------- CONTROLFILE 0 0 0 ONLINELOG 0 0 0 ARCHIVELOG 7.1 0 3 BACKUPPIECE 34.23 1.4 8 IMAGECOPY 0 0 0 FLASHBACKLOG 0 0 0 6 rows selected.9.切换用户后，问题已经解决
SYS@ orcl>conn scott/tiger Connected. SCOTT@ orcl>总结：此错误由于归档日志超过闪回空间所致，定期清除归档日志即可避免次错误发生。