Don Seiler

"Oracle database administrator for The Pythian Group, headquartered in Ottawa, Ontario, Canada. I am located in Manitowoc, Wisconsin, USA. OCP 10gR2 DBA"

Oracle

Moving Oracle Datafiles to a ZFS Filesystem with the Correct Recordsize

Oracle

Does Oracle's Block Change Tracking File Shrink?

Intro Just a quick post to get myself back into blogging mode. Recently in IRC ( #oracle on freenode, to be precise), a ...

Oracle

HOWTO: Oracle Cross-Platform Migration with Minimal Downtime

Strategy for a Minimal Downtime Migration I recently performed a migration from Oracle 10gR2 on Solaris to the same ...

Oracle

ORA-16069? You May Need A New Standby Controlfile

Backstory: On a recent Monday, I had to perform an emergency Oracle standby switchover for a client whose primary ...

Oracle

Setting up Network ACLs in Oracle 11g… For Dummies

Having recently performed a test upgrade for a client from Oracle RDBMS 10g to 11g, I can tell you that one of the big ...

Oracle

Beware the /var/tmp/.oracle Hidden Directory!

Background A few months ago, we had a test instance complaining that it couldn’t write to ASM. This was an 11.1.0.7 ...

Oracle

Installing Oracle 11gR2 Enterprise Edition on Ubuntu 10.04 (Lucid Lynx)

I recently reformatted my laptop with the latest Ubuntu LTS release, 10.04, aka Lucid Lynx. Since I like to have a ...

Oracle

FLASHBACK TABLE vs. DBA_OBJECTS . LAST_DDL_TIME

A little over a week ago, a teammate and I were trying to use Oracle’s FLASHBACK TABLE to undo an “oops” UPDATE ...

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Using Multi-Agent Reasoning for NLP-to-SQL

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Oracle Data Integrator (aka Sunopsis) Now On OTN

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Don Seiler

Posts by Don Seiler

Moving Oracle Datafiles to a ZFS Filesystem with the Correct Recordsize

Does Oracle's Block Change Tracking File Shrink?

HOWTO: Oracle Cross-Platform Migration with Minimal Downtime

ORA-16069? You May Need A New Standby Controlfile

Setting up Network ACLs in Oracle 11g… For Dummies

Beware the /var/tmp/.oracle Hidden Directory!

Installing Oracle 11gR2 Enterprise Edition on Ubuntu 10.04 (Lucid Lynx)

FLASHBACK TABLE vs. DBA_OBJECTS . LAST_DDL_TIME

Recent news

Pythian Recognized as a Top AI & Data Consulting Firm for 2026

Pythian Recognized as Silver Winner in UKOUG Data Integration Partner of the Year Awards 2026

Pythian Leaders Recognized on CRN’s 2026 Women of the Channel List

Pythian and Three of Its Leaders Named Finalists for the 2025 CRN Women of the Year Awards

Pythian India Earns “Great Place to Work” Certification for Fourth Consecutive Year

Pythian’s Vanessa Simmons and Donna Williston Again Named to CRN’s 2025 Women of the Channel List

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Pythian India Earns “Great Place to Work” Certification for Third Consecutive Year

Pythian Recognized on CRN’s 2024 Solution Provider 500 List and DBTA’s 100 Companies That Matter Most in Data for 2024

Pythian Welcomes Brooks Borcherding as Chief Executive Officer

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Pythian Recognized as a Top Employer in Canada’s National Capital Region in 2024

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Keith Angell: Accelerating Enterprise Growth With Data And Analytics Through Remarkable Leadership

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Pythian Appoints Keith Angell As CEO

Pythian Services Acquires Google Cloud Premier Partner Agosto

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Pythian achieves Cloud Migration Partner Specialization in the Google Cloud Partner Specialization Program

Pythian achieves Google Cloud Platform Partner Specialization In Infrastructure

Pythian recognized as the winner of the Microsoft Canada Application Innovation IMPACT Award

Pythian’s Vice President of Business Development recognized as one of CRN’s 2018 Women of the Channel

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BBM Messenger selects Pythian for major Google Cloud Platform migration

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Pythian named one of Canada’s top employers for the fourth consecutive year

Pythian achieves Google Cloud Premier Partner status

Rapid sales growth drives European expansion for Pythian

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Pythian now offers Google BigQuery services to its enterprise customers

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Pythian named Global Outsourcing 100® Rising Star for 2016

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