Since Oracle Database 11g, all traces, incident dumps and packages, the alert log, Health Monitor reports, core dumps, and more files are stored in the ADR, a file-based Automatic Diagnostic Repository for simplified database diagnostic data management. However housekeeping or purging of those files got not simplified. Unfortunately the new Oracle utility ADRCI can not purge all the files Oracle database generates in ADR. Thus, you should use the other OS tools to accomplish the same. Below I list common Oracle files that must be cleaned periodically with associated housekeeping methods I usually use on Linux servers.
– Linux log rotate mechanism used
– alert.log, listener.log, backup logs and any other log files affected
– Files are purged and zipped for archiving purpose
Read more about Oracle database housekeeping using Unix logrotate mechanism.
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The Oracle Database Sample Schemas provide a common platform for examples in each release of Oracle Database. They are easy to use for testing and training purposes. All Oracle Database documentation and training materials refer to the Sample Schemas environment.
Following are Oracle Sample Schemas
– OE (Order Entry schema) – useful for dealing with matters of intermediate complexity. Many data types are available in this schema, including non-scalar data types.
– HR (Human Resources schema) – useful for introducing basic topics. An extension to this schema supports Oracle Internet Directory demos.
– PM (Product Media schema) is dedicated to multimedia data types.
– IX (Information Exchange main schema) includes a set of schemas for demonstrate Oracle Advanced Queuing capabilities
– SH (Sales History schema) is designed to allow for demos with large amounts of data. An extension to this schema provides support for advanced analytic processing.
– SCOTT – old-fashioned famous schema with its two prominent tables EMP and DEPT that is used by Oracle for many years.
– BI – includes only synonyms on SH schema
With this simplicity I personally found difficulties in creating Sample Schemas in Oracle 11g database. In fact I could not do it in a standard way with Oracle installation binaries before 18.104.22.168. If somebody experienced similar issues, I give below the way how to install Sample Schemas manually. Read more »
Oracle GRID Infrastructure 11gR2 introduces many great ASM features. However most of them are disabled by default even if you run Oracle 11gR2 database on it. Below I share some clarify on how to enable new ASM 11g features for your 11g database. Read more »
Oracle introduces hundreds of new database features in every database release. At the same time some tiny small restrictions in the code exist for a long time that bother database developers and DBAs at their daily work. Below I explore some of the common Oracle restrictions I often encounter during database administration. I give the workarounds for most of them and compare some with Microsoft SQL Server implementations. Read more »
I often hear from customers: Oracle database server is so expensive. Well, I often answer: That depends! In fact, the Oracle database license costs are similar to software from Oracle’s competitors. Microsoft SQL Server has a different license model though. Oracle has a lot of advantages in its flexible license model as well as number of Open Source initiatives. Together, these options allow an enterprise to get cost savings on their IT investments. Read more »