DBA Lounge

Liveblogging: Who is the Dick on My Site?

How do you prove to a website who you are? It’s not what you give to the site, but what the site knows about you! If you have a good eBay rating, can you take that over to Craigslist? What we want in Identity 2.0 is a way to make identity user-centric, not site-centric, so a person can move their identity around. How do we solve this you ask.

MySQL Plug-in 0.42 for Oracle Grid Control: First Beta Released

has finally happened! The first public release of the MySQL plug-in for Oracle Enterprise Manager 10g Grid Control is out. In the last few months, more and more people showed interest in the potential plug-in, and even few guys from Oracle contacted me independently of each other with their own reasons to have a MySQL plug-in available. This interest accelerated the fermentation of thoughts in my brain, and I got down to work. Pythian generously sponsored my development time. Here are the details. The first release version is 0.42 because that’s obviously the perfect number to start something good.

How to Make an In-Database listener.log File

Ever wished the listener.log file was a table in the database? Wish no more! About three years ago, I sent this recipe in an email to my co-workers. Just recently, Shakir re-sent it after using the method in an emergency. Since it seems to have proved its value, I now offer it to our readers. Have a look.

When SHOW SLAVE STATUS lies

Over-the-Top Tales from the Trenches: Bringing order to the chaos of every day DBA life – So you have got your nice MySQL Master-Slave replication pair setup. Everything is sweet, then the master dies/restarts or you have a slightly extended network outage. You log into the machine and check out why the slave threw an error or if your monitoring is slow, why the slave is lagging by 2 hours. You run SHOW SLAVE STATUS\G

How To Identify the Database Links of a Failed Refresh Job

I have a client with refreshes scheduled using MV refresh groups, and it took me a while to recall the view name, asking around and RTFM’ing. Since this situation comes up regularly, I wrapped up a quick script that parses job content, takes in account MV refresh groups, and outputs the database link(s) involved. I think it could be useful to few others so here it goes.

Rajaraman’s First Law: More Data will beat Better Software

After the interesting comment storm on Doug’s blog when he posted some of Tim Gorman’s comments on the value of data in his career experiences as compared to the value of the applications manipulating that data, I hesitate a little to post this. But, I can’t stop myself because it’s such an interesting insight! So here it is!

3 Tips on Using dg4odbc on 64-bit Linux

I recently imported the contents of an Oracle 8i database into an 11g database. After following the instructions for a typical setupI set up a database link to a remote SQL Server database, and called it SQLSERVER.. It turned out that dg4odbc has “hard coded” the quotes and this will need to be changed in odbc.ini. I should have looked more closely at the installation instructions — yes, the example shows QuotedId=Yes.

Unintentional Googlewhack Leads to MySQL Bug Report

While doing a standard audit for a new client, I recommended a few changes to get better performance. Because I had several changes, I used the documentation and found that innodb_flush_log_at_trx_commit is a dynamic variable. I was surprised, because most operations dealing with file sizes and operations are not dynamic. So I searched for others who may have had the same error, and ended up getting an unintentional googlewhack.

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