Comments for Oracle + Open Source

Comment on DBJ: DRBD & Virtualbox Setup by Sean Hull

Sean Hull — Tue, 05 Jan 2010 08:35:53 +0000

Hi Mike,

I guess I made some assumptions that might not be obvious to all readers.

You’re absolutely right, performance through the VM would not be acceptable. I/O would be slow not least because your two VMs and the larger OS are all sharing a single disk. But further, I wouldn’t run MySQL on a laptop or other single disk machine anyway.

The purpose of the article here is to create a virtual environment or sandbox within which an admin play around. You can pull the levers and turn the dials, and get comfortable with how all the moving parts work.

For production use you’d have two separate servers with their own disk subsystem or shared storage.

-Sean

Comment on DBJ: DRBD & Virtualbox Setup by mike503

mike503 — Tue, 05 Jan 2010 08:29:48 +0000

How is the I/O and other performance inside of Vbox?

Perhaps for webserver load I could see it working fine but DB I/O? Seems like that might be a stretch.

Comment on Underground PHP/Oracle Manual by CJ

CJ — Fri, 03 Apr 2009 21:19:25 +0000

The correct link to the Underground PHP and Oracle Manual is http://www.oracle.com/technology/tech/php/pdf/underground-php-oracle-manual.pdf

The whitepaper on PHP connection pooling is also useful:
http://www.oracle.com/technology/tech/php/pdf/php-scalability-ha-twp.pdf

Comment on Underground PHP/Oracle Manual by hates lazy people

hates lazy people — Fri, 20 Mar 2009 11:41:03 +0000

google is your friend.

first result back

http://www.oracle.com/technology/tech/php/pdf/underground-php-oracle-manual.pdf

Comment on DBJ: Optimizing the MySQL Query Cache by erkan

erkan — Mon, 09 Mar 2009 16:06:58 +0000

What do you mean with “as well”?
MySQL doesnt cache the queryplan:-(

Comment on Oracle HA On A Budget: Manual Standby Database by Jacqueline Glen

Jacqueline Glen — Mon, 16 Feb 2009 23:31:01 +0000

Hello, I need information about the article “Oracle HA On A Budget: Manual Standby Database”.

How can I get it?

Thank you

Comment on DBJ – Advanced MySQL Replication – Improving Performance by Sheeri Cabral

Sheeri Cabral — Wed, 11 Feb 2009 22:27:53 +0000

The #1 cause of this type of slave lag that I have seen is poor query/schema design. “Optimize your schema, data and queries” should be the very first thing to do. GCN had a great article a while back on “Secrets of Optimization” written by Joab Jackson.

http://gcn.com/Articles/2008/08/15/Secrets-of-optimization.aspx

The article goes into optimizing queries and schema. However, there’s a third aspect, optimizing your data. This means having as small a data set as possible. Can you move historical data to another table? Can you use a SMALLINT instead of an INT?

Optimizing data/schema/queries solves 90% or more of common replication issues, and unfortunately did not end up on the list.

Comment on DBJ – Advanced MySQL Replication – Improving Performance by William Newton

William Newton — Wed, 11 Feb 2009 20:35:38 +0000

I don’t think using MyIsam on the slave is such a good idea. Reads block writes with MyIsam. So if you have a slave for the long running read only queries .. MyIsam will cause replication to fall behind.

Comment on review: Backup & Recovery by W. Curtis Preston by mutu26

mutu26 — Tue, 10 Feb 2009 10:11:31 +0000

There is a not bad tool which is able works with sql files,as is known tool is free-sql server recovery tool,program repair data from corrupted databases in the MS SQL Server format (files with the *.mdf extension),supports data extraction via the local area network,can save recovered data as SQL scripts, it is also possible to split data into files of any size,compatible with all supported versions of Microsoft Windows, such as Windows 98, Windows Me, Windows NT 4.0, Windows 2000, Windows XP, Windows XP SP2, Windows 2003 Server, Windows Vista,tool supports the following database formats: Microsoft SQL Server 7.0, 2000, 2005,also can repair .mdf files of Microsoft SQL Server 2005, repair mdf file of Microsoft SQL Server 2005 (64-bit).

Comment on O’Reilly Webcast – MySQL Replication – Audit, Test & Verify by Michael J. Cohen

Michael J. Cohen — Mon, 09 Feb 2009 03:03:52 +0000

is it just me, or is the audio codec terrible? :/ my ears hurt.

Comment on Underground PHP/Oracle Manual by moonsoup

moonsoup — Thu, 27 Nov 2008 00:48:16 +0000

the actual link is
http://www.oracle.com/technology/tech/php/pdf/underground-php-oracle-manual.pdf

Comment on Oracle DBAs Guide to MySQL Databases by Johnny

Johnny — Mon, 10 Nov 2008 17:59:56 +0000

“More and more MySQL databases are sneaking their way into the Oracle environment.”.

LOL, sure xDDD.

Comment on Oracle DBAs Guide to MySQL Databases by Sheeri K. Cabral

Sheeri K. Cabral — Sat, 08 Nov 2008 18:17:27 +0000

Where is this presentation occurring?

Comment on Oracle DBAs Guide to MySQL Databases by Ronald Bradford

Ronald Bradford — Sat, 08 Nov 2008 02:44:38 +0000

As a Senior Consultant with MySQL Inc prior to acquisition (and previous Oracle expert), I was responsible for developing and delivering the “MySQL for Oracle DBA Bootcamp”, that was a 1 day course successfully delivered in New York, San Francisco and Washington DC, to 100+ groups.

Should you require additional MySQL expertise in this field, please feel free to contact me.

Comment on My Drupal – MySQL high performance optimizations by Kris Buytaert

Kris Buytaert — Fri, 07 Nov 2008 12:06:33 +0000

I’d love to read your findings when you have them ready
A I won’t be making it to the MySQL conf please also post them on your blog !