DBAlife http://www.dbalife.com 星光照耀前方 Tue, 02 Dec 2008 07:57:42 +0000 http://wordpress.org/?v=2.6.5 en PS状态码 http://www.dbalife.com/archives/199 http://www.dbalife.com/archives/199#comments Tue, 02 Dec 2008 07:57:42 +0000 skywalker http://www.dbalife.com/archives/ps%e7%8a%b6%e6%80%81%e7%a0%81/ PROCESS STATE CODES

Here are the different values that the s, stat and state output specifiers
(header “STAT” or “S”) will display to describe the state of a process.
D Uninterruptible sleep (usually IO)
R Running or runnable (on run queue)
S Interruptible sleep (waiting for an event to complete)
T Stopped, either by a job control signal or because it is being traced.
W paging (not valid since the 2.6.xx kernel)
X dead (should never be seen)
Z Defunct (”zombie”) process, terminated but not reaped by its parent.

For BSD formats and when the stat keyword is used, additional characters may
be displayed:
< high-priority (not nice to other users)
N low-priority (nice to other users)
L has pages locked into memory (for real-time and custom IO)
s is a session leader
l is multi-threaded (using CLONE_THREAD, like NPTL pthreads do)
+ is in the foreground process group

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]]> http://www.dbalife.com/archives/199/feed 用APXS编译Apache模块 http://www.dbalife.com/archives/193 http://www.dbalife.com/archives/193#comments Fri, 14 Nov 2008 07:05:40 +0000 skywalker http://www.dbalife.com/archives/%e7%94%a8apxs%e7%bc%96%e8%af%91apache%e6%a8%a1%e5%9d%97/ apxs是一个为Apache HTTP服务器编译和安装扩展模块的工具，用于编译一个或多个源程序或目标代码文件为动态共享对象，使之可以用LoadModule指令在运行时加载到Apache服务器中。

1. 进入apache源代码的modules目录

2. 运行如下命令自动编译、安装和修改httpd.conf文件，激活mod_proxy模块：

apache path/bin/apxs -c -i -a mod_proxy.c proxy_util.c

选项说明：

-c 执行编译操作
-i 安装操作，安装一个或多个动态共享对象到服务器的modules目录
-a 自动增加一个LoadModule行到httpd.conf文件，以激活此模块，若此行存在则启用之
-A 与-a类似，但是它增加的LoadModule行前有井号前缀(#)
-e 需要执行编辑操作，可与-a和-A选项配合使用，与-i操作类似，修改httpd.conf文件，但并不安装此模块

3. 如果还需要其他proxy模块如mod_proxy_http、mod_proxy_ftp，则单独

apxs -c -i proxy_http.c
apxs -c -i proxy_ftp.c

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]]> http://www.dbalife.com/archives/193/feed RMAN TAG参数的禁区 http://www.dbalife.com/archives/192 http://www.dbalife.com/archives/192#comments Thu, 13 Nov 2008 03:31:43 +0000 skywalker http://www.dbalife.com/archives/rman-tag%e5%8f%82%e6%95%b0%e7%9a%84%e7%a6%81%e5%8c%ba/ RMAN具有非常丰富的命令，为这些命令服务的保留字有几十上百个，如allocate、rsync、show、backup等等。

在书写RMAN脚本时，需要特别小心不要用到保留字，否则会导致RMAN-01007错误

以TAG参数为例：

当tag为backup时，报错
RMAN> run{
2> backup tablespace user
3> tag backup

RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-00558: error encountered while parsing input commands
RMAN-01009: syntax error: found “backup”: expecting one of: “double-quoted-string, equal, identifier, single-quoted-string”
RMAN-01007: at line 3 column 5 file: standard input

当tag为backup1时，正常运行
RMAN> run {                    
2> backup tablespace users
3> tag backup1;
4> }

Starting backup at 13-NOV-08
using channel ORA_DISK_1
channel ORA_DISK_1: starting full datafile backupset
channel ORA_DISK_1: specifying datafile(s) in backupset
input datafile fno=00004 name=/opt/u01/oracle/oradata/mydb/users01.dbf
channel ORA_DISK_1: starting piece 1 at 13-NOV-08
channel ORA_DISK_1: finished piece 1 at 13-NOV-08
piece handle=/oracle/flash_recovery_area/MYDB/backupset/o1_mf_nnndf_BACKUP1_4kq7rcpv_.bkp tag=BACKUP1 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:01
Finished backup at 13-NOV-08

Starting Control File and SPFILE Autobackup at 13-NOV-08
piece handle=/oracle/flash_recovery_area/MYDB/autobackup/o1_mf_s_670678156_4kq7rfb5_.bkp comment=NONE
Finished Control File and SPFILE Autobackup at 13-NOV-08

RMAN>

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]]> http://www.dbalife.com/archives/192/feed resin2升级为resin3后遇到的jsp显示问题 http://www.dbalife.com/archives/189 http://www.dbalife.com/archives/189#comments Mon, 27 Oct 2008 09:36:22 +0000 skywalker http://www.dbalife.com/?p=189 将系统由resin 2.1.17升级为resin 3.0.25后，发现大部分JSP不能正常显示，错误都类似：

Caused by: javax.servlet.jsp.JspException: An error occurred while evaluating custom action attribute “value” with value “${user.ID}”: Unable to find a value for “ID” in object of class “java.lang.String” using operator “.” (null)

这是resin3与jstl的问题，需要将resin自带的jstl1.1禁用。

方法如下 ：
将resin的conf文件中：
<servlet servlet-name=”directory” servlet-class=”com.caucho.servlets.DirectoryServlet”/>
修改为：
<servlet servlet-name=”directory” servlet-class=”com.caucho.servlets.DirectoryServlet”>
    <init enable=”false”/>
</servlet>

在resin的webapp配置中,添加一个<jsp>标签
<web-app id=”/test” document-directory=”webapps/test”>
    <jsp fast-jstl=”false”/>      
</web-app>

最后，将JSP文件中
<%@ taglib prefix=’c’ uri=’http://java.sun.com/jstl/core’ %> 
修改为
<%@ taglib prefix=’c’ uri=’http://java.sun.com/jsp/jstl/core’ %> 

现在JSP可以正常显示了

]]> http://www.dbalife.com/archives/189/feed Eva在Ubuntu 8.10中崩溃的问题 http://www.dbalife.com/archives/188 http://www.dbalife.com/archives/188#comments Thu, 23 Oct 2008 05:58:53 +0000 skywalker http://www.dbalife.com/archives/eva%e5%9c%a8ubuntu-810%e4%b8%ad%e5%b4%a9%e6%ba%83%e7%9a%84%e9%97%ae%e9%a2%98/ 从8.04升级到8.10后，原本正常运行的Eva一登录就崩溃。

Ubuntu源中的Eva已经更新为0.49版本，折衷的解决方法就是回退Eva版本至0.41

Eva 0.41在这里下载

安装完成后系统会提示Eva可更新至0.49，在新立得软件包管理器中，选中Eva，再从软件包菜单中选择“锁定版本”，就可以解除这个提示了。

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]]> http://www.dbalife.com/archives/188/feed ORACLE 10G AWR 速查 http://www.dbalife.com/archives/187 http://www.dbalife.com/archives/187#comments Tue, 21 Oct 2008 06:58:12 +0000 skywalker http://www.dbalife.com/archives/oracle-10g-awr-%e9%80%9f%e6%9f%a5/ 安装
SQL> SQLPLUS / AS SYSDBA
SQL> exec dbms_workload_repository.create_snapshot
SQL> exec:snap_id:=dbms_workload_repository.create_snapshot
SQL> var snap_id number
SQL> print snap_id
SQL> @?/rdbms/admin/awrrpt.sql

操作
1.查看当前的AWR保存策略
select * from dba_hist_wr_control;
DBID,SNAP_INTERVAL,RETENTION,TOPNSQL
860524039,+00 01:00:00.000000,+07 00:00:00.000000,DEFAULT
以上结果表示,每小时产生一个SNAPSHOT，保留7天

2.调整AWR配置
AWR配置都是通过dbms_workload_repository包进行配置
2.1调整AWR产生snapshot的频率和保留策略，如：如将收集间隔时间改为30 分钟一次。并且保留5天时间（注：单位都是为分钟）：
exec dbms_workload_repository.modify_snapshot_settings(interval=>30, retention=>5*24*60);
2.2关闭AWR,把interval设为0则关闭自动捕捉快照
2.3手工创建一个快照
exec DBMS_WORKLOAD_REPOSITORY.CREATE_SNAPSHOT ();
2.4 查看快照
select * from sys.wrh$_active_session_history
2.5手工删除指定范围的快照
exec WORKLOAD_REPOSITORY.DROP_SNAPSHOT_RANGE(low_snap_id => 22, high_snap_id => 32, dbid => 3310949047);
2.6创建baseline
exec dbms_workload_repository.create_baseline (56,59,’apply_interest_1′)
2.7删除baseline
exec DBMS_WORKLOAD_REPOSITORY.DROP_BASELINE(baseline_name => ‘ apply_interest_1′, cascade => FALSE);

3.生产AWR报告
$ORACLE_HOME/rdbms/admin/awrrpt.sql

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]]> http://www.dbalife.com/archives/187/feed 如何获得廉价的metalink帐号 http://www.dbalife.com/archives/186 http://www.dbalife.com/archives/186#comments Fri, 17 Oct 2008 01:08:51 +0000 skywalker http://www.dbalife.com/archives/%e5%a6%82%e4%bd%95%e8%8e%b7%e5%be%97%e5%bb%89%e4%bb%b7%e7%9a%84metalink%e5%b8%90%e5%8f%b7/ Oracle Metalink帐号需要购买产品支持服务才可以拥有，而这个服务价格通常是产品价格的18%，非常贵。

DBA notes的Fenng分享了一个好方法：

购买

  • Oracle Collaboration Suite，单用户永久License，60美元
  • 软件更新License与支持服务，15美元

一共75美元，即可拥有Metalink帐号

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]]> http://www.dbalife.com/archives/186/feed crs_stat中UNKNOWN状态的处理方法 http://www.dbalife.com/archives/185 http://www.dbalife.com/archives/185#comments Tue, 14 Oct 2008 02:05:48 +0000 skywalker http://www.dbalife.com/archives/crs_stat%e4%b8%adunknown%e7%8a%b6%e6%80%81%e7%9a%84%e5%a4%84%e7%90%86%e6%96%b9%e6%b3%95/ [oracle@rac01 ~]$ crs_stat -t
Name           Type           Target    State     Host       
————————————————————
ora.dppc.db    application    ONLINE    ONLINE    rac01      
ora….c1.inst application    ONLINE    ONLINE    rac01      
ora….c2.inst application    ONLINE    ONLINE    rac02      
ora….01.lsnr application    ONLINE    ONLINE    rac01      
ora.rac01.gsd  application    ONLINE    ONLINE    rac01      
ora.rac01.ons  application    ONLINE    ONLINE    rac01      
ora.rac01.vip  application    ONLINE    ONLINE    rac01      
ora….02.lsnr application    ONLINE    ONLINE    rac02      
ora.rac02.gsd  application    ONLINE    UNKNOWN   rac02      
ora.rac02.ons  application    ONLINE    UNKNOWN   rac02      
ora.rac02.vip  application    ONLINE    ONLINE    rac02      

[oracle@rac01 ~]$ crs_stop ora.rac02.gsd -f
Attempting to stop `ora.rac02.gsd` on member `rac02`
Stop of `ora.rac02.gsd` on member `rac02` succeeded.

[oracle@rac01 ~]$ crs_stop ora.rac02.ons -f
Attempting to stop `ora.rac02.ons` on member `rac02`
Stop of `ora.rac02.ons` on member `rac02` succeeded.

[oracle@rac01 ~]$ srvctl start nodeapps -n rac02

[oracle@rac01 ~]$ crs_stat -t
Name           Type           Target    State     Host       
————————————————————
ora.dppc.db    application    ONLINE    ONLINE    rac01      
ora….c1.inst application    ONLINE    ONLINE    rac01      
ora….c2.inst application    ONLINE    ONLINE    rac02      
ora….01.lsnr application    ONLINE    ONLINE    rac01      
ora.rac01.gsd  application    ONLINE    ONLINE    rac01      
ora.rac01.ons  application    ONLINE    ONLINE    rac01      
ora.rac01.vip  application    ONLINE    ONLINE    rac01      
ora….02.lsnr application    ONLINE    ONLINE    rac02      
ora.rac02.gsd  application    ONLINE    ONLINE    rac02      
ora.rac02.ons  application    ONLINE    ONLINE    rac02      
ora.rac02.vip  application    ONLINE    ONLINE    rac02  

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]]> http://www.dbalife.com/archives/185/feed ORA-00600: internal error code, arguments: [kjzcreaprqhq1] http://www.dbalife.com/archives/184 http://www.dbalife.com/archives/184#comments Thu, 25 Sep 2008 07:54:26 +0000 skywalker http://www.dbalife.com/archives/ora-00600-internal-error-code-arguments-kjzcreaprqhq1/ RAC一个节点遭遇这个ORA-600错误，系统是64位RHEL4＋Oracle10.2.0.1

查metalink得知是由于UDP interconnect发送超时，在trace中可以找到这样的提示：

    WARN: acconn …. getting closed. inactive: threshold: 0×0
    WARN: potential problem in keep alive connection protocol

解决方法有2：

一是打补丁升级至10.2.0.2或更高版本
二是使用隐藏初始化变量”_skgxp_udp_ach_reaping_time”：
alter system set “_skgxp_udp_ach_reaping_time” = 0 scope=both;
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]]> http://www.dbalife.com/archives/184/feed 表空间使用状况查询 http://www.dbalife.com/archives/178 http://www.dbalife.com/archives/178#comments Thu, 25 Sep 2008 01:16:25 +0000 skywalker http://www.dbalife.com/?p=178 SELECT D.TABLESPACE_NAME ,
SPACE “SUM_SPACE(M)” ,
BLOCKS SUM_BLOCKS ,
SPACE -NVL(FREE_SPACE,0) “USED_SPACE(M)” ,
ROUND((1-NVL(FREE_SPACE,0)/SPACE)*100,2) “USED_RATE(%)”,
FREE_SPACE “FREE_SPACE(M)”
FROM
(SELECT TABLESPACE_NAME ,
ROUND(SUM(BYTES)/(1024*1024),2) SPACE,
SUM(BLOCKS) BLOCKS
FROM DBA_DATA_FILES
GROUP BY TABLESPACE_NAME
) D ,
(SELECT TABLESPACE_NAME,
ROUND(SUM(BYTES)/(1024*1024),2) FREE_SPACE
FROM DBA_FREE_SPACE
GROUP BY TABLESPACE_NAME
) F
WHERE D.TABLESPACE_NAME = F.TABLESPACE_NAME(+)

UNION ALL –if have tempfile

SELECT D.TABLESPACE_NAME ,
SPACE “SUM_SPACE(M)” ,
BLOCKS SUM_BLOCKS ,
USED_SPACE “USED_SPACE(M)” ,
ROUND(NVL(USED_SPACE,0)/SPACE*100,2) “USED_RATE(%)”,
NVL(FREE_SPACE,0) “FREE_SPACE(M)”
FROM
(SELECT TABLESPACE_NAME ,
ROUND(SUM(BYTES)/(1024*1024),2) SPACE,
SUM(BLOCKS) BLOCKS
FROM DBA_TEMP_FILES
GROUP BY TABLESPACE_NAME
) D ,
(SELECT TABLESPACE_NAME ,
ROUND(SUM(BYTES_USED)/(1024*1024),2) USED_SPACE,
ROUND(SUM(BYTES_FREE)/(1024*1024),2) FREE_SPACE
FROM V$TEMP_SPACE_HEADER
GROUP BY TABLESPACE_NAME
) F
WHERE D.TABLESPACE_NAME = F.TABLESPACE_NAME(+)

]]> http://www.dbalife.com/archives/178/feed