Bug of Prod of Oracle
A bug of Oracle 8.0.5.2When I query GL_JE_LINES, it prompt like following:20:42:55 ORA-01115: 从文件8读取块时出现 IO 错误(块#1048578)20:42:55 ORA-01110: 数据文件8:'/u02/appldata/PROD/find01.dbf'20:...
Write a simple security audit script for Oracle
For Oracle SecurityThose who are familiar with the Oracle data dictionary can use the dictionary to find out if their database has any security exposures. Here are some common queries that are used to...
Oracle Internal Parameter set for Unix
in Linux /etc/system Asked Tom,a. db1 – concurrent users + processes = 410b. db2 – concurrents users + processes = 50c. db3 – concurrents users + processes = 50The above three databases ar...
企业管理黄金定律
企业管理黄金定律,转自两全其美BBS1、素养 ●蓝斯登原则:在你往上爬的时候,一定要保持梯子的整洁,否则你下来时可能 会滑倒。 提出者:美国管理学家蓝斯登。 点评:进退有度,才不至进退...
Oracle性能调优实践中的几点心得
很多的时侯,做Oracle DBA的我们,当应用管理员向我们通告现在应用很慢、数据库很慢的时侯,我们到数据库时做几个示例的Select也发现同样的问题时,有些时侯我们会无从下手,因为我们认为数据库的各种命种率都是满足...
让一天不止24小时的20种方法(请耐心读完)
现代管理大师彼德·德鲁克有这样一句名言:“时间是最高贵而有限的资源,不能管理时间,便什么都不能管理。”英国博物学家赫胥黎说得更形象:“时间是最不偏私的,给任何人都是24小时,同时时间是最偏私的,给任何人...
说一说Oracle的优化器(Optimizer)
本文的目的:1、说一说Oracle的Optimizer及其相关的一些知识。2、回答一下为什么有时一个表的某个字段明明有索引,当观察一些SQL的执行计划时,发现确不走索引的问题。3、如果你对 FIRST_ROWS、 ALL_ROWS这两种模式有...
Online Index Rebuild and Table Redefinition
From Other SiteA number of new features in Oracle9i have increased database availablity including:Online Index Rebuilds Online Table Redefinition Online Analyze Validate Quiesce Database Dynamic Initi...
Trigger3-Insert Row Trigger Syntax
The Insert Row trigger has the following syntax.CREATE OR REPLACE TRIGGER trigger_nameAFTER|BEFORE INSERT ON table_nameFOR EACH ROW[WHEN (Boolean expression)]DECLARE Local declarationsBEGIN ...
成语新解_zt
1.知书达礼:仅知道书本知识是不够的,还要学会送礼;2.度日如年:日子非常好过,每天象过年一样;3.杯水车薪:每天办公室喝喝茶,月底可以拿到一车工资;4.知足常乐:知道有人请自己洗脚,心里就感到快乐;5.见异思...
Oracle Block Error
If you find block Error in alert or when you run sql Statement......If we run Oracle in Archive log mode. And the Error was not in system/Redo and Rollback segment.A. Recovery with Backup files. 1.cp...
Oracle Advanced Replication
日益增长的分布式应用需求要求实现更好分布式的软件环境,不断推动着分布式技术的进步。Oracle数据复制是实现分布式数据环境的一种技术,通过在不同的物理站点拷贝数据来建立分布式数据环境。它与分布式数据库不...
Analyze Library Cache Pin and 4021 Error
From MetalinkPURPOSE------- This article discuss the library cache locks and pins and how to analyzelocking problems in this area. SCOPE & APPLICATION------------------- Support analysts, dba's, .. T...
Performance and Tuning on the Solaris 6 7 8
Performance Tuning for SolarisWhen a system is running slowly and performance is degrading, it is difficult to know what the cause is. Whether the cause is a lack of memory, disk subsystem bottleneck,...
When to Implement Parallel Execution
When to Implement Parallel Execution , We know parallel Execution will greatly improve performance, but,The most common use of parallel execution is in DSS and data warehousingenvironments. Complex qu...
成长中必须知道的20个故事
1、断箭 不相信自己的意志,永远也做不成将军。 春秋战国时代,一位父亲和他的儿子出征打战。父亲已做了将军,儿子还只是马前卒。又一阵号角吹响,战鼓雷鸣了,父亲庄严地托起一个箭囊,其中插着一只箭。父...
v$sesstat and v$statname usage
From the performance of OracleTo determine the STATISTIC#’s for the session logical reads and physicalreads statistics:SELECT name, statistic#FROM V$STATNAMEWHERE name IN ('session logical reads','ph...
Shared memory uncovered
Share memory/Shmmax and so on.Abstract Shared memory is an interprocess communication (IPC) facility that exists in every major version of Unix available today. It is ubiquitous in its use by applicat...
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How to Create a Large SGA Without Relocating sgabeg on 32-bit Oracle?
About SGA set of Limited of 32 bit or 64 bit in UnixHow to Create a Large SGA Without Relocating sgabeg on 32-bit Oracle?One of our production data warehouse servers (Oracle 8.1.7.4 Solaris 2.6 sun4u ...