What Oracle DBAs Need to Learn in Oracle Cloud Platform?

The transition from Oracle on-premises DBA to Oracle Cloud DBA is imminent for many of us. In fact, IMHO; the existing Oracle DBAs would have to manage database both on-premises and in cloud for a long time.

So what Oracle DBA needs to learn in Oracle Cloud Platform? If you visit the Oracle Cloud website, it's a mouthful and more. Its very easy to get bogged down as there are lots of things to (more...)

Is Oracle Database in Cloud PaaS, IaaS, SaaS, or DBaaS?

Question: Is Oracle Database in Cloud PaaS, IaaS, SaaS, or DBaaS?
Answer:
  • If you install and manage Oracle database in cloud by yourself, then you are using it on IaaS.
  • If you are just using it in cloud without installing or managing it, then it's PaaS.
  • If you are configuring the database instance and have access to it through SQL*Net, then its DBaaS. 
  • SaaS not really relevant when it comes to Oracle (more...)

Upgrade of Oracle GI 11.2.0.3 to Oracle 12.1.0.2 Steps

Just noting down the high level steps which were performed for the Upgrade of Oracle GI 11.2.0.3 to Oracle 12.1.0.2 on RHEL 64bit Linux.

Create a backup of 11G GI HOME as root user:

. oraenv <<< +ASM
 sudo su -
cd /oracle/backup
tar -cvf backup_GI.tar /u01/grid/product/11.2.0.3
tar -cvf backup_inventory.tar  /var/opt/ora/oraInventory/



Stop all DB instances and listener

run the GI 12c runInstaller in silent mode (more...)

Log Buffer #507: A Carnival of the Vanities for DBAs

This Log Buffer edition covers Oracle, SQL Server and MySQL blog posts with a touch of Cloud.

Oracle:

Provisioning EBS on Oracle Cloud: Latest Enhancements

ORA-54002 when trying to create Virtual Column using REGEXP_REPLACE on Oracle 12cR2

Business rules, common sense and query performance

Problem with V$RECOVERY_AREA_USAGE view and FRA space not being reclaimed

Updated SQLcl: 2 New Commands, Bug Fixes, and 12cR2 Oh My!

SQL Server:

Windowing Functions: Tell me (more...)

Log Buffer #505: A Carnival of the Vanities for DBAs

This Log Buffer Edition searches through various blogs of Oracle, SQL Server and MySQL and picks a few contemporary ones.

Oracle:

Comma separated search and search with check-boxes in Oracle APEX

Once you have defined your users for your Express Cloud Service, all users with the role of Database Developer or higher can access the database Service Console.

Big Data Lite 4.7.0 is now available on OTN!

Install and configure Oracle HTTP Server (more...)

Log Buffer #504: A Carnival of the Vanities for DBAs

This edition of Log Buffer covers Oracle, Microsoft SQL Server, and MySQL.

Oracle:

Data Pump or Data Pain Part02 – tablespace/user

Monday Spotlight: It’s About Security – Oracle Exadata SL6

0001_specify_date_format_mask.md copy

OGG Custom Adapters: How to include a unique identifier for every record in custom adapter?

One of the optimizer enhancements that appeared in 12.2 for SQL is the “band join” that makes certain types of merge join much (more...)

Google Cloud Platform Fundamentals in Sydney

Just finished up one day training at Google's Sydney office in Google Cloud Platform Fundamentals. GCP is pretty cool and I think I like it.

Lots of our customers at Pythian are already hosting, migrating and thinking of doing so on cloud. Pythian already has a huge presence in cloud using various technologies.

So it was good to learn something about the Google's cloud offering. It was a pleasant surprise as it all made sense. (more...)

Speaking at APAC OTN TOUR 2016 in Wellington, New Zealand

The APAC OTN Tour 2016 will be running from October 26th until November 11th visiting 4 countries/7 Cities in the Asia Pacific Region.

I will be speaking at APAC OTN TOUR 2016 in Wellington, New Zealand on 26th October on the topic which is very near and dear to me; Exadata and Cloud.

My session is 12c Multi-Tenancy and Exadata IORM: An Ideal Cloud Based Resource Management with Fahd Mirza

Hope to see you there !

ORA-01156 When Adding Standby Redo Log in Dataguard Configuration

Database version = 11.2.0.3.0

If you get following error while adding a Standby Redo Log (SRL) to a standby database in dataguard configuration:

SQL> alter database add standby logfile group 3 '/logs/test/sbyredo3a.log' size 500M;
alter database add standby logfile group 3 '/logs/test/sbyredo3a.log' size 500M
*
ERROR at line 1:
ORA-01156: recovery or flashback in progress may need access to files


Then it means that first you have to stop (more...)

WordPress Fatal error: Call to undefined method PHPMailer::getCustomHeaders()


With numerous new themes and new versions of the wordpress, when you try to publish some post or page or try to send email or try to use contact form, you might get following error:


Fatal error: Call to undefined method PHPMailer::getCustomHeaders()





This error normally occurs if you are using incompatible wordpress and theme and plugin versions. The best course of action is to update your wordpress, your theme, and all the plugin and make (more...)

Opatchauto Session failed: Parameter validation failed

While applying PSU on Grid Home in 12c, due to the patch conflict, you might have to rollback few patches before you could apply the PSU.

After rolling back the patches from grid home, when you try to run the opatch analyze command again, you might encounter following error:




Step by Step Jan 2016 PSU Patch Apply on 12c Grid and RDBMS Homes in Linux


Following step by step action plan is for single instance database stored on ASM in 12.1.0.2 on Linux (OEL 6 64 bit in this case.)





exec_as_oracle_script

There might be a situation where executing some DDL in pluggable database may cause the following error:

ORA-65040: operation not allowed from within a pluggable database

This error could occur if a tablespace is being dropped from within PDB and this tablespace is a former default tablespace having some of the system objects. Even system objects cannot be moved with simple alter statements from within PDBs.

So in order to move these objects from within (more...)

Got Published in AUSOUG’s Foresight Online Spring 2015

AUSOUG's Foresight Online Spring 2015 Edition is the premier publication by Australian Oracle User Group.

Following are highlights of this edition:

  • President's Message
  • DBA Article: Automated Testing of Oracle BPM Suite 12c Processes with SOAP UI - Peter Kemp, State Revenue Office, Victoria
  • DBA Article: Best Practices for Oracle on Pure Storage
  • Apps Article: Performance Review Data Capture - Brad Sayer, More4Apps
  • DBA / Dev Article: Database Developers – Feeling (more...)

Sharding in Oracle 12c Database

Sharding for Oracle DBAs is still pretty much an alien or pretty new concept. In the realms of big data, this term is being used quite extensively though.

What is Sharding in simple words:

Sharding is partitioning. Horizontal partitioning to be exact.

Sharding means partitioning a table rows on basis of some criteria and storing that partitioned rows of table (i.e. a shard) on different database servers. These database servers are cheap low commodity (more...)

ORA-01917: user or role ‘PDB_DBA’ does not exist

I manually created a container database (CDB) 12.1.0.2.0 in my Linux 6.4 based virutal machine. After creating it, I tried to create a pluggable database but got following error:




SQL> select instance_name,status from v$instance;

INSTANCE_NAME    STATUS
---------------- ------------
cdbtest          OPEN

1 row selected.

SQL> show con_name

CON_NAME
------------------------------
CDB$ROOT

SQL> select * from cdb_pdbs;

    PDB_ID
----------
PDB_NAME
--------------------------------------------------------------------------------
      DBID    CON_UID GUID                             STATUS    CREATION_SCN
---------- ---------- -------------------------------- --------- ------------
(more...)

Amazon S3 to Glacier – Cloud ILM

Falling in love with Kate Upton is easy but more easier is to be swept off your feet by information lifecycle management (ILM) in the Amazon Web Services (AWS). Simple, easily-configurable, fast, reliable, cost effective and proven are the words which describe it.

Pythian has been involved with ILM for a long time. With various flavors of databases and systems, Pythian has been overseeing creation, alteration, and flow of data for a long time until (more...)

Last Successful login time in 12c

One cool small yet valuable feature in Oracle 12c is the display of 'Last Successful login time'. If authentication is from the OS level, then it isn't shown. A small demo is as follows:




[oracle@targettest ~]$ sqlplus '/ as sysdba'

SQL*Plus: Release 12.1.0.1.0 Production on Sun Sep 6 18:22:00 2015

Copyright (c) 1982, 2013, Oracle.  All rights reserved.


Connected to:
Oracle Database 12c Enterprise Edition Release 12.1.0.1. (more...)

d in Vertica

A quick neat way to list down important and oft-needed information like names of databases, schemas, users, tables, projections etc. We can also use patterns with the 'd' to narrow down the results. Let's see it in action:



Connect with Vertica vsql:

vsql  -U dbadmin -w vtest -h 0.0.0.0 -p 5433 -d vtest

 Welcome to vsql, the Vertica Analytic Database interactive terminal.
Type:  h or ? for help with vsql commands
g (more...)

Creating User Schema Table and Projections in Vertica

Vertica is a an exciting database with some real nifty features. Projections is a ground breaking unique feature of Vertica which dramatically increases performance benefits in terms of querying and space benefits in terms of compression.



Following test commands are impromptu sesssion in which a user is being created, then a schema is created, and that user is authorized on that schema. Then a table is created with a default superprojection and then a projection (more...)