Posts Categorized: Pythian

Interesting Behavior of MaxCmdsInTran Parameter

I recently worked on transactional replication issue and discovered interesting behavior of the log reader agent switch called MaxCmdsInTran and wanted to share it with you guys. Lets take a look at  the use of this switch by looking at the msdn documentation below, MaxCmdsInTran number_of_commands Specifies the maximum number of statements grouped into a transaction as the Log…

In-Memory Column Store: 10046 May Be Lying to You!

The Oracle In-Memory Column Store (IMC) is a new database option available to Oracle Database Enterprise Edition (EE) customers. It introduces a new memory area housed in your SGA, which makes use of the new compression functionality brought by the Oracle Exadata platform, as well as the new column oriented data storage vs the traditional…

Create Windows Service for Oracle RAC

It’s my first time on RAC system for Windows and I’m happy to learn something new to share. I created a new service for database (restoredb) only to find out the ORACLE_HOME for the service is “c:\\oracle\\product\\10.2.0\\asm_1″ Any ideas as to what was wrong? C:\\dba_pythian>set oracle_home=C:\\oracle\\product\\10.2.0\\db_1 C:\\dba_pythian>echo %ORACLE_HOME% C:\\oracle\\product\\10.2.0\\db_1 C:\\dba_pythian>oradim -NEW -SID restoredb -STARTMODE manual…

How SQL Server Browser Service Works

Some of you may wonder the role SQL browser service plays in the SQL Server instance. In this blog post, I’ll provide an overview of the how SQL Server browser plays crucial role in connectivity and understand the internals of it by capturing the network monitor output during the connectivity with different scenario. Here is an executive…

TechTalk v5.0 – The Age of Big Data with Alex Morrise

Who: Hosted by Blackbird, with a speaking session by Alex Morrise, Chief Data Scientist at Pythian. What: TechTalk presentation, beer, wine, snacks and Q&A Where: Blackbird HQ – 712 Tehama Street (corner of 8th and Tehama) San Francisco, CA When: Thursday July 31, 2014 from 6:00-8:00 PM How: RSVP here! TechTalk v5.0 welcomes to the…

Logging for Slackers

When I’m not working on Big Data infrastructure for clients, I develop a few internal web applications and side projects. It’s very satisfying to write a Django app in an afternoon and throw it on Heroku, but there comes a time when people actually start to use it. They find bugs, they complain about downtime,…

Happy System Administrator Appreciation Day

Today is our day. July 25, 2014 marks the 15th annual System Administrator Appreciation Day. On this day we pause and take a moment to forget the impossible tasks, nonexistent budgets, and often unrealistic timelines to say thank you to those people who keeps everything working — system administrators. So much of what has become a…

Exploring Options of Using RMAN Configure to Simplify Backup

I am a simple person who likes simple things, especially RMAN backup implementation. I have yet to understand why RMAN backup implementation does not use configure command, and if you have a good explanation, please share. Examples for RMAN configure command configure device type disk parallelism 2 backup type to compressed backupset; configure channel device…

How To Correlate Oracle Database Transaction with GoldenGate

So there I was troubleshooting GoldenGate issue and was puzzled as to why GoldenGate transactions were not seen from Oracle database. I had the transaction XID correct; however, I was filtering by ACTIVE transaction from Oracle which was causing the issue. Please allow me to share a test case so that you don’t get stumped…

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