pTools — 进程监控的一组工具
{
pTools是AIX 5.2中引进的System V UNIX 提供的一组极有用的工具，用于查看进程相关的信息。包括命令：
{
procwdx,
procfiles,
procflags,
proccred,
procmap,
procldd,
procsig,
procstack,
procstop,
procrun,
procwait,
proctree
}
procwdx, — 显示进程的当前工作目录。如：{
ccd[……]
November 2, 2011 system, unix No comments memory
很多客户可能认为svmon -S中inuse的求和结果和svmon -G中的inuse一样，但是实际是不一样的。下面的脚本可以用来统计svmon -S中的inuse的相加结果：
#!/usr/bin/ksh
svmon -S | cut -c54-62 | awk ‘/^[-sLm]/ {if ($1 ~ /L/)
{COUNT1 =($2*4096+COUNT1)}
else if ($1 ~ /m/)
{COUNT2 =($2*16+COUNT2)}
else {COUNT3 =$2+COUNT3}}
END {printf “The result is as f[……]
November 2, 2011 oracle, RAC 3 comments trouble shooting
环境描述：双节点rac 数据库版本10.2.0.5 通过awr发现down机时间段产生大量的cursor: pin S wait on X等待，同时伴随大量的library latch等待，通过与相关人员沟通得知，此库在每月的月头都会有大量的报表业务，从而负载将会增长几十倍之多。通过下面
的awr可以看出负载确实很高：
DB NameDB IdInstanceInst numReleaseRACHost
PORTALDB597889515portaldb1110.2.0.5.0YESptdb01
Snap IdSnap TimeSes[……]
November 1, 2011 system 2 comments
测试coolcode插件
select * from v$session where status=’HAPPY’ and owner=’LIU’
and sid not in (1900,2012) order by sid asc
good luck![……]
October 29, 2011 migration, oracle 3 comments oracle Install
某局威武，升级弄完都到凌晨6点了 居然还要搭DG ,下面记录这次的升级过程（9.2.0.7-10.2.0.4）
迁移步骤：
1 首先安装10g的数据库软件,基于当时的AIX情况，由于系统是通过OS升级重新导入到P6 570上的需要重新开启AIO,数据库版本为9.2.0.7 需要再打一个bos.cifs.**补丁
2 copy 10g ORACLE_HOME/rdbms/admin 下的脚本
ORACLE_HOME/rdbms/admin/utlu102i.sql /tmp/utlu102i.sql
ORACLE_HOME/rdbms/admin/utltzuv2[……]
October 29, 2011 maintain, oracle No comments ORA-600
今天偶尔碰到一个ORA-600错误：
[oracle@honcho ~]$ sqlplus sys/oracle@honcho as sysdba
SQL*Plus: Release 10.2.0.1.0 – Production on Sat Oct 29 18:25:11 2011
Copyright (c) 1982, 2005, Oracle. All rights reserved.
Connected to an idle instance.
SQL> conn / as sysdba
Connected to an idle instanc[……]
October 27, 2011 maintain, oracle 2 comments dead lock
创建测试环境：
[oracle@yang ~]$ sqlplus ‘/as sysdba’
SQL*Plus: Release 10.2.0.4.0 – Production on Thu Oct 27 00:03:46 2011
Copyright (c) 1982, 2007, Oracle. All Rights Reserved.
Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 – Production
With the Partitioning, O[……]
October 24, 2011 Internals, oracle 1 comment oracle data
xxx_objects.data_object_id differs from object_id after
* truncate table (or alter table truncate partition), unless table/partition is empty
* alter table move (or alter table move partition)
* alter index rebuild (or alter index rebuild partition)
* alter table exchange partition
Alte[……]
October 24, 2011 Internals, oracle 2 comments oracle data
通过dump datafile header 发现每个Checkpoint cnt不同
大致原因如下：
1.tablespace 建立的时间不同 现在我们新建一个tablespace ->liu datafile->liu01.dbf
DATA FILE #10:
(name #14) /u01/liu01.dbf
creation size=128 block size=8192 status=0xe head=14 tail=14 dup=1
tablespace 8, index=8 krfil=10 prev_file=0
unrecoverable sc[……]
October 22, 2011 maintain, oracle 5 comments 恢复
最近看到同事的一个案例，觉得很有趣 现在测试下：
SQL> select * from v$version;
BANNER
—————————————————————-
Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 – Prod
PL/SQL Release 10.2.0.4.0 – Production
CORE 10.2.0.4.0 Production
TNS for Linux: Version 10.2.0.4.0[……]