Posts Categorized: Pythian
A short story depicting the life of an on call DBA
Welcome to the 24th edition of Log Buffer, the weekly review of the database blogosphere.
Carl Sagan is a personal hero of mine. Ten years ago today this gifted communicator died of cancer. And so today the community of bloggers that loved and admired Carl Sagan is having a spontaneous blogathon in his memory. You might ask, what does Carl Sagan have to do with being a good DBA? Believe it or not, a lot. Yes, really.
Welcome, reader, to the 23rd edition of Log Buffer, the weekly, human-edited review of the database blogosphere.
Oracle thinks it can make queries run better by not having to parse them repeatedly, so it grows the shared pool to keep as many queries as it can. Problem: the shared pool is now 4G+. That takes a while to trawl through, which of course adds to the spins on the library cache lock and pushes up CPU usage. I’m going to get into more detail on this when I have the time, but for this db, I think I’m going to switch to manual SGA and set a hard limit of 500M-1G on the shared pool
Brian Kelley has published Log Buffer #22, the weekly review of database blogs, on SQLServerCentral.com blogs.
In MySQL–land, failovers for redundancy, disaster recovery, or load balancing are performed by master databases and slave databases, the most popular method using binlog replication. There are a couple more methods of replication which aren’t covered here. Also see the MySQL Replication FAQ. The methods are the same, but the formatting of the procedure(s) are less than ideal.
Anyone interested in the architecture of highly scalable and stable infrastructure will enjoy this Presentation by Randy Shoup and Dan Pritchett of Ebay on how they, in their words, “strike a balance between site stability, feature velocity, performance, and cost.”
I noticed sufficient swap/paging on AIX boxes for a Pythian client. (PAGING column in topas result). When I was investigating more about this issue, I found helpful document in Vivek Sharma ‘s blog and metalink note 316533.1.
My colleague Vamsi Chikkam noticed that the Oracle 10.2.0.3 patchset has been released for Linux and Windows 32-bit. The major bugfixes are the same as my original post with a few additions: