Infrastructure at your Service
To do some application and performances tests, I had to copy a database from a third party Linux server to an ODA X7-2M. Looks pretty simple on the paper, but 2 small challenges came into the game. The first was that of course the source database was in Non-OMF while ODA works fully in OMF. The second was that the source database is running 11.2.0.3 which is not supported and cannot be installed on the…
This is a small migration demo of a 11g catalog (RCAT11G) to a new 12c catalog (RCAT12c). Demo databases environments have been easily managed thanks to DBI DMK tool. oracle@vmreforadg01:/home/oracle/ [RCAT11G] sqh SQL*Plus: Release 11.2.0.4.0 oracle@vmtestoradg1:/home/oracle/ [RCAT12C] sqh SQL*Plus: Release 12.2.0.1.0 Current configuration Displaying the list of databases registered in the RCAT11g catalog. SQL> select instance_name from v$instance; INSTANCE_NAME —————- RCAT11G SQL> select * from rcat.rc_database; DB_KEY DBINC_KEY DBID NAME RESETLOGS_CHANGE# RESETLOGS ———-…
Last day I was configuring grid infrastructure 11.2.0.3 for a standlone server. After the installation, I decided to apply the Patch Set Update 11.2.0.3.7 (Includes Database PSU 11.2.0.3.7) – 16742216 In the documentation it is marked You must use the OPatch utility version 11.2.0.3.4 or later to apply this patch. Verifying my opatch version, I see that I have to update it [root@ ]# ./OPatch/opatch version Invoking OPatch 11.2.0.1.7 OPatch Version: 11.2.0.1.7 So I download…
Available methods to enable 10046 trace are described in My Oracle Support Note 376442.1. You can enable 10046-tracing – on session level (alter session) – for other sessions (e.g. with oradebug, the package DBMS_MONITOR or DBMS_SYSTEM) What is not covered with the methods above is the possibility to trace a specific SQL-statement, which runs “somewhen” in the future on the database. E.g. a SQL, which runs during a next batch job. With the introduction of…
We have Upgrade our Environment Oracle DBA Essentials Workshop of release 11.2.0.3 to 11.2.0.4. From now on, you can operates the various subjects on the new release. In this article, I present you the procedure to be followed for the upgrade of your database: Update DMK to the version 14-10 Upgrade database Install Oracle Patchset 11.2.0.4 and PSU Update DMK 14-10 The first step it’s update Data Management Kit, included dmk_sql. We need to Download,…
We discovered a strange behavior in the Alert Log when the Fast Recovery Area (FRA) is full and the database wants to write something inside it (for example an archivelog). This case concern Oracle 11.2.0.3 databases and higher. Here is a demo with a 12c database (12.1.0.2) : First, to reproduce the behavior, I set a very small size to the FRA : SQL> alter system set db_recovery_file_dest_size = 1M; System altered. SQL> As you can see, the…
With Enterprise Manager Cloud Control 12c configuring and using the compliance standard utility allows us to discover events we should not have seen in other ways. Today at a customer’s site I discovered the following message: The configuration Best Practice for Oracle Database discovered the statistics_level parameter was set to the value ALL. By selecting the Violation in the Configuration Best Practice for Oracle Database, we can display the message: By…
Sometimes we have to index on ( trunc(date) ) because a SQL statement uses predicate on it instead of giving a range from midnight to midnight. When you do that you probably keep the index on the column. That’s two indexes to maintain for DML. Do we need it? I’ll show a feature that appeared in 11.2.0.2 (info from oracle-l) so let’s set the optimizer to behave as before that feature. SQL> alter session set…
Since Oracle 10g, Oracle provides a great tool to import and export data from databases: Data Pump. This tool offers several helpful options, particularly one that allows to import data in a different tablespace than the source database. This parameter is REMAP_TABLESPACE. However, how can you do the same when you cannot use Data Pump to perform Oracle import and export operations? I was confronted with this issue recently, and I had to deal with…
In a previous post I explained how to measure the number of processes that are generated when a fork() or clone() call checks the nproc limit. There is another limit in /etc/limits.conf – or in /etc/limits.d – that is displayed by ‘ulimit -n’. It’s the number of open files – ‘nofile’ – and here again we need to know what kind of files are counted. nofile ‘nofile’ is another limit that may not be easy…
