如何查看数据库alert日志文件

本文将详细介绍下查看 *** 作系统版本/查看预警日志文件（alert_sid.log）的位置/查看alert中的内容/看看数据库有哪些 可爱的ORA- 错误吧等等，感兴趣的你可以参考下

1、查看 *** 作系统版本

SQL>select * from v$version

BANNER

----------------------------------------------------------------

Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Prod

PL/SQL Release 10.2.0.1.0 - Production

CORE 10.2.0.1.0 Production

TNS for Linux: Version 10.2.0.1.0 - Production

NLSRTL Version 10.2.0.1.0 - Production

SQL>

2、查看预警日志文件（alert_sid.log）的位置

SQL>show parameter dump

NAME TYPE VALUE

------------------------------------ ----------- ------------------------------

background_core_dump string partial

background_dump_dest string /u01/oracle/admin/bdump

core_dump_dest string /u01/oracle/admin/cdump

max_dump_file_size string 10240

shadow_core_dump string partial

user_dump_dest string /u01/oracle/admin/udump

3、创建目录alert

注意：directory不是实体，只是一个指向，指向os中一个路径

SQL>create or replace directory alert as '/u01/oracle/admin/bdump'

Directory created.

SQL>

4、创建外部表alert

SQL>create table alert

1 (log varchar2(1000))

2 organization external

3 (type oracle_loader

4 default directory alert

5 access parameters

6 (records delimited by newline)

7 location ('alert_PROD.log'))

8 reject limit unlimited

Table created.

5、查看alert中的内容

SQL>select * from alert where rownum<20

LOG

--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Wed Feb 27 11:05:11 2013

Starting ORACLE instance (normal)

Cannot determine all dependent dynamic libraries for /proc/self/exe

Unable to find dynamic library libocr10.so in search paths

RPATH = /ade/aime1_build2101/oracle/has/lib/:/ade/aime1_build2101/oracle/lib/:/ade/aime1_build2101/oracle/has/lib/:

LD_LIBRARY_PATH is not set!

The default library directories are /lib and /usr/lib

Unable to find dynamic library libocrb10.so in search paths

Unable to find dynamic library libocrutl10.so in search paths

Unable to find dynamic library libocrutl10.so in search paths

LICENSE_MAX_SESSION = 0

LICENSE_SESSIONS_WARNING = 0

Picked latch-free SCN scheme 2

Using LOG_ARCHIVE_DEST_1 parameter default value as /u01/oracle/product/10.2.0/db_1/dbs/arch

Autotune of undo retention is turned on.

IMODE=BR

ILAT =10

LICENSE_MAX_USERS = 0

SYS auditing is disabled

19 rows selected.

SQL>

6、看看数据库有哪些 可爱的ORA- 错误吧

SQL>select * from alert where log like '%ORA-%'

LOG

--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

ORA-959 signalled during: alter database default tablespace users...

ORA-959 signalled during: drop tablespace uses...

ORA-12919 signalled during: drop tablespace users...

ORA-1549 signalled during: drop tablespace users...

ORA-1505 signalled during: alter database add logfile group 1

ORA-1184 signalled during: alter database add logfile group 1

ORA-1013 signalled during: alter tablespace tts read only...

ORA-1013 signalled during: alter tablespace tts read only...

ORA-1013 signalled during: alter tablespace users read only...

ORA-1539 signalled during: alter tablespace users read only...

1、数据库查询出数据，放到session

2、input text框设置相应的事件，或者用onclick触发

3、获取input的值，跟session取出的值比对

在js中，判断比对结果，d出alert("相等") 或者不等

在后台捕获异常，如果你是用的MVC的话，然后再返回一个json错误页面，错误页面的内容是

{success:falsemessage:"后台出错！"}

对应的前台就可以这样写

success: function(data){

if(data.success){

alert(“成功！")

}else{

alert(data.message)

}

关键是你通过ajax调用的页面最终返回json，而且该json内容包含可判断的信息。

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