Oracle 告警日志时DBA维护数据库经常需要关注的一部分内容。然而告警日志以文本文件,按时间的先后顺序不断累积的形式来存储,久而久之,势必造成告警日志的过大,难于维护和查找相关的信息。使用外表表方式来管理告警日志将大大简化维护工作量,也更直关的获取所需的信息。 一、告警日志的内容 消息和错误的类型(Types of messages and errors) ORA-600内部错误(ORA-600 internal errors that need immediate support from Oracle"s customer support )" ORA-1578块损坏错误(ORA-1578 block corruption errors that require recovery) ORA-12012(作业队列错误(ORA-12012 job queue errors) 实例启动关闭,恢复等信息(STARTUP & SHUTDOWN, and RECOVER statement execution messages) 特定的DDL命令(Certain CREATE, ALTER, & DROP statements ) 影响表空间,数据文件及回滚段的命令(Statements that effect TABLESPACES, DATAFILES, and ROLLBACK SEGMENTS ) 可持续的命令被挂起(When a resumable statement is suspended ) LGWR不能写入到日志文件(When log writer (LGWR) cannot write to a member of a group ) 归档进程启动信息(When new Archiver Process (ARCn) is started ) 调度进程的相关信息(Dispatcher information) 动态参数的修改信息(The occurrence of someone changing a dynamic parameter) 二、建立外部表 1.查看后台日志路径 sys@ORCL> show parameter %b%_dump_dest --此可以省略,在后面直接用脚本cre_ext_tb.sql 实现 NAME TYPE VALUE ------------------------------------ ----------- ------------------------------ background_dump_dest string /u01/oracle/admin/orcl/bdump 2.创建用户并赋予特定的权限,并创建数据库目录 sys@ORCL> create user usr1 identified by usr1 --创建帐户usr1 2 temporary tablespace temp 3 default tablespace users 4 quota unlimited on users; sys@ORCL> grant connect,resource to usr1; --为帐户usr1授予connect,resource角色 sys@ORCL> grant create any directory to usr1; --为帐户usr1授予创建目录的权限 sys@ORCL> conn usr1/usr1 --使用usr1连接数据库 3.下面使用脚本来完成对告警日志的跟踪及管理 脚本描述 cre_ext_tb.sql 主要是创建了一个alert_log表用于存放告警日志的重要信息,一个外部表alert_log_disk使得查看告警日志可以直接在本地数据 库中完成。 update_alert_log.sql 用于从外部表将重要信息经过过滤并且将没有存放到alert_log表中的最新信息更新到alert_log表。 4.使用下面的脚本来创建alert_log表及alert_log_disk外部表 usr1@ORCL> get /u01/bk/scripts/cre_ext_tb.sql --查看建表的代码 1 define alert_length="500" 2 drop table alert_log; 3 create table alert_log ( --创建表alert_log用于存放告警日志的重要信息 4 alert_date date, 5 alert_text varchar2(&&alert_length) 6 ) 7 storage (initial 512k next 512K pctincrease 0); 8 create index alert_log_idx on alert_log(alert_date) --为表alert_log创建索引 9 storage (initial 512k next 512K pctincrease 0); 10 column db new_value _DB noprint; 11 column bdump new_value _bdump noprint; 12 select instance_name db from v$instance; --获得实例名以及告警日志路径 13 select value bdump from v$parameter 14 where name ="background_dump_dest"; 15 drop directory BDUMP; 16 create directory BDUMP as "&&_bdump"; 17 drop table alert_log_disk; 18 create table alert_log_disk ( text varchar2(&&alert_length) ) --创建外部表 19 organization external ( 20 type oracle_loader 21 default directory BDUMP 22 access parameters ( 23 records delimited by newline nologfile nobadfile 24 fields terminated by "&" ltrim 25 ) 26 location("alert_&&_DB..log") 27 ) 28* reject limit unlimited; usr1@ORCL> start /u01/bk/scripts/cre_ext_tb.sql --执行建表的代码 5.使用下面的脚本填充alert_log表 usr1@ORCL> get /u01/bk/scripts/update_alert_log.sql --脚本update_alert_log.sql用于将外部表的重要信息填充到alert_log 1 set serveroutput on 2 declare 3 isdate number := 0; 4 start_updating number := 0; 5 rows_inserted number := 0; 6 alert_date date; 7 max_date date; 8 alert_text alert_log_disk.text%type; 9 begin 10 /* find a starting date */ 11 select max(alert_date) into max_date from alert_log; 12 if (max_date is null) then 13 max_date := to_date("01-jan-1980", "dd-mon-yyyy"); 14 end if; 15 for r in ( 16 select substr(text,1,180) text from alert_log_disk --使用for循环从告警日志过滤信息 17 where text not like "%offlining%" 18 and text not like "ARC_:%" 19 and text not like "%LOG_ARCHIVE_DEST_1%" 20 and text not like "%Thread 1 advanced to log sequence%" 21 and text not like "%Current log#%seq#%mem#%" 22 and text not like "%Undo Segment%lined%" 23 and text not like "%alter tablespace%back%" 24 and text not like "%Log actively being archived by another process%" 25 and text not like "%alter database backup controlfile to trace%" 26 and text not like "%Created Undo Segment%" 27 and text not like "%started with pid%" 28 and text not like "%ORA-12012%" 29 and text not like "%ORA-06512%" 30 and text not like "%ORA-000060:%" 31 and text not like "%coalesce%" 32 and text not like "%Beginning log switch checkpoint up to RBA%" 33 and text not like "%Completed checkpoint up to RBA%" 34 and text not like "%specifies an obsolete parameter%" 35 and text not like "%BEGIN BACKUP%" 36 and text not like "%END BACKUP%" 37 ) 38 loop 39 isdate := 0; 40 alert_text := null; 41 select count(*) into isdate --设定标志位,用于判断改行是否为时间数据 42 from dual 43 where substr(r.text, 21) in ("2009","2010","2011","2012","2013") 44 and r.text not like "%cycle_run_year%"; 45 if (isdate = 1) then --将时间数据格式化 46 select to_date(substr(r.text, 5),"Mon dd hh24:mi:ss rrrr") 47 into alert_date 48 from dual; 49 if (alert_date > max_date) then --设定标志位用于判断是否需要update 50 start_updating := 1; 51 end if; 52 else 53 alert_text := r.text; 54 end if; 55 if (alert_text is not null) and (start_updating = 1) then --start_updating标志位与alert_text为真,插入记录 56 insert into alert_log values (alert_date, substr(alert_text, 1, 180)); 57 rows_inserted := rows_inserted + 1; 58 commit; 59 end if; 60 end loop; 61 sys.dbms_output.put_line("Inserting after date "||to_char(max_date, "MM/DD/RR HH24:MI:SS")); 62 sys.dbms_output.put_line("Rows Inserted: "||rows_inserted); 63 commit; 64* end; 65 usr1@ORCL> start /u01/bk/scripts/update_alert_log.sql Inserting after date 01/01/80 00:00:00 Rows Inserted: 632 PL/SQL procedure successfully completed. 基于上述方法,可以定期将告警日志更新到本地数据库,然后清空告警日志文件
ORA-32004 的错误处理SQL 基础--> NEW_VALUE 的使用相关资讯 Oracle告警日志
- Oracle通过视图和告警日志检查主库 (07/20/2015 21:11:35)
- Oracle 11g告警日志存储路径 (11/15/2012 15:13:52)
| - Linux/Unix shell 监控Oracle告警 (02/05/2013 11:49:32)
|
本文评论 查看全部评论 (0)