oracle归档盘空间不足

参考链接

一、 监控原因及监控阈值

归档空间不足会导致oracle数据库的在线日志无法正常归档，进一步导致数据库的不可用。监控阈值为存放归档日志的磁盘利用率高于80%且可用空间小于1T;

二、 监控阈值查询语句

SET linesize 200

SELECT USAGE,
       To_char(sysdate, 'yyyy-mm-dd hh24:mi:ss'),
       NAME,
       USABLE_FILE_MB
FROM   (SELECT Round(( t.CAN_USE_TOTAL_MB - t.USABLE_FILE_MB ) / Decode(t.CAN_USE_TOTAL_MB, 0, 1,
                                                                                            t.CAN_USE_TOTAL_MB) * 100) AS USAGE,
               d.diskgroup_type,
               t.NAME,
               t.USABLE_FILE_MB,
               t.min_need_free_mb
        FROM   (SELECT p.NAME,
                       p.type,
                       p.TOTAL_MB,
                       p.REQUIRED_MIRROR_FREE_MB,
                       ( a.total_free_mb - p.REQUIRED_MIRROR_FREE_MB ) / Decode(p.TYPE, 'NORMAL', 2,
                                                                                        'HIGH', 3,
                                                                                        1) AS USABLE_FILE_MB,
                       ( p.TOTAL_MB - p.REQUIRED_MIRROR_FREE_MB ) / Decode(p.TYPE, 'NORMAL', 2,
                                                                                   'HIGH', 3,
                                                                                   1)      AS CAN_USE_TOTAL_MB,
                       Decode(Sign(a.min_need_free_mb - 1048576), -1, 1048576,
                                                                  a.min_need_free_mb)      AS min_need_free_mb
                FROM   v$asm_diskgroup p,
                       (SELECT group_number,
                               Min(free_mb) * Count(*) AS total_free_mb,
                               32768 * Count(*)        AS min_need_free_mb
                        FROM   v$asm_disk
                        GROUP  BY group_number) a
                WHERE  p.group_number = a.group_number) t,
               (SELECT 'ARCH_DG'                              AS diskgroup_type,
                       Upper(Replace(a.DESTINATION, '+', '')) AS diskgroup_name
                FROM   v$archive_dest a
                WHERE  a.TARGET IN ( 'PRIMARY', 'LOCAL' )
                       AND A.STATUS = 'VALID'
                       AND a.valid_now = 'YES'
                       AND a.DESTINATION IS NOT NULL
                       AND a.DESTINATION <> 'USE_DB_RECOVERY_FILE_DEST'
                       AND a.dest_name <> 'STANDBY_ARCHIVE_DEST'
                UNION
                SELECT 'ARCH_DG'                        AS diskgroup_type,
                       Upper(Replace(p.VALUE, '+', '')) AS diskgroup_name
                FROM   v$parameter p,
                       v$archive_dest a
                WHERE  p.name = 'db_recovery_file_dest'
                       AND a.DESTINATION = 'USE_DB_RECOVERY_FILE_DEST') d
        WHERE  t.name = d.diskgroup_name)
WHERE  USAGE >= 80
       AND USABLE_FILE_MB <= min_need_free_mb;