Using Oracle Wallet to Execute Shell script/cron without hard coded Oracle database password
You have been asked to schedule a shell script which need to connect to a particular user and perform some action? How do you pass the password to script without hardcoding it in script. If password is written in a script, isn’t it a security threat? Well with 10gR2 , Oracle Wallet provides you with facility to store database credentials in client side Oracle Wallet. Once stored, you can connect to database using sqlplus /@connect_string Let’s see … Read entire article »
11gR2: Monitoring Real Time SQL Plan Execution from Oracle Enterprise Manager
Ever since 11gR2 has been released, it has created a lot of buzz in Oracle Blogosphere with various posts on 11g Release 2 (11gR2 ) New Features primarily ASM New features. I would like to introduce you all to a feature which has been incorporated in 11gR2 Oracle Enterprise Manager to display Real-Time SQL Monitoring information . I would say that this was much awaited feature which had to be implemented in OEM and comes as a handy … Read entire article »
Filed under: Featured, performance
Get Upgrading: Steps To Upgrade To 11gR2
As 11gR2 is out for Linux, I decided to upgrade one of my existing 10.2.0.3 database to 11.2.0.1 to get the look and feel of 11gR2. Direct upgrade to 11gR2 is supported from 9.2.0.8 or higher, 10.1.0.5 or higher, 10.2.0.2 or higher and 11.1.0.6 or higher. If you have a database 9.2.0.6 then first you need to upgrade to intermediate release i.e 9.2.0.8 then to 11.2.0.1. 9.2.0.6==>9.2.0.8==>11.2.0.1 8.1.7.0==>8.1.7.4==>10.2.0.4==>11.2.0.1 I will discuss how to upgrade an existing Single Instance … Read entire article »
Simplified Approach to Resolve ORA-4031
After writing few Case studies and other related articles, I will be sharing my approach for Resolving ORA -4031 error. First we will see what ORA-4031 actually means. 04031, 00000, "unable to allocate %s bytes of shared memory (\"%s\",\"%s\",\"%s\,\"%s\")" // *Cause: More shared memory is needed than was allocated in the shared pool. // *Action: If the shared pool is out of memory, either use the // dbms_shared_pool package to pin large packages, // reduce your use of shared memory, or increase the amount of // available shared memory by increasing the value of the // INIT.ORA parameters "shared_pool_reserved_size" … Read entire article »
Resolving Shutdown Immediate Hang Situations
Many times Oracle DBA’s are faced with a situation where shutting down the instance with shutdown immediate seems to take infinite time and gives a impression that the session is hung. In most of the cases this is not a hang. Hang can be defined as a scenario when few sessions/processes are waiting on some action and in turn blocking other session/processes to complete their tasks. Now the original sessions could be waiting because of resource issues or Oracle Bugs. Shutdown immediate can take long time to complete (appear to be hung) because of three reasons: 1. Uncommitted transactions are being rolled back. 2. SMON is cleaning temp segments or performing delayed block cleanouts. 3. Processes still continue to be connected to the database and do not terminate. 1. Uncommitted transactions are being rolled back: This … Read entire article »
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