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Time-Series Database Requirements Published Jun 8, 2014 by Baron Schwartz in Databases, Best Of at https://www.xaprb.com/blog/2014/06/08/time-series-database-requirements/ I’ve had conversations about time-series databases with many people over the last couple of years. I wrote previously about some of the open-source technologies that people commonly use for time-series storage. Because I have my
If Eventual Consistency Seems Hard, Wait Till You Try MVCC Published Dec 8, 2014 by Baron Schwartz in Programming, Databases at https://www.xaprb.com/blog/2014/12/08/eventual-consistency-simpler-than-mvcc/ This should sound familiar: One of the great lies about NoSQL databases is that they’re simple. Simplicity done wrong makes things a lot harder and more complicated to develop and operate. Progr
Go MySQL Drivers Published Apr 29, 2014 by Baron Schwartz in Databases, Programming at https://www.xaprb.com/blog/2014/04/29/golang-mysql-drivers/ If you’re interested in Google’s Go programming language, perhaps you aren’t sure what drivers to use for MySQL. The good news is there are excellent drivers for MySQL. There are several opensource ones on GitHub and elsewhere, but the driver I recommen
Time-Series Databases and InfluxDB Published Mar 2, 2014 by Baron Schwartz in Databases at https://www.xaprb.com/blog/2014/03/02/time-series-databases-influxdb/ Time-series databases are of particular interest to me these days. Not only is VividCortex working with large-scale time-series data, but it’s a growing trend in the technology world in general. What’s perhaps most surprising is the dearth
Immutability, MVCC, and Garbage Collection Published Dec 28, 2013 by Baron Schwartz in Databases, Best Of at https://www.xaprb.com/blog/2013/12/28/immutability-mvcc-and-garbage-collection/ Not long ago I attended a talk about Datomic, which focused a lot on database immutability and its benefits. I hope to illustrate why many database designs are much more complicated than Datomic and its ilk. Alt
How PostgreSQL Protects Against Partial Page Writes and Data Corruption Published Feb 8, 2010 by Baron Schwartz in Databases at https://www.xaprb.com/blog/2010/02/08/how-postgresql-protects-against-partial-page-writes-and-data-corruption/ I explored two interesting topics today while learning more about Postgres. Partial page writes PostgreSQL’s partial page write protection is configured by the f
How to Select the First/Least/Max Row per Group in SQL Published Dec 7, 2006 by Baron Schwartz in Databases at https://www.xaprb.com/blog/2006/12/07/how-to-select-the-firstleastmax-row-per-group-in-sql/ Here are some common SQL problems, all of which have related solutions: how do I find the most recent log entry for each program? How do I find the most popular item from each category? How do I fi
High Performance MySQL, Third Edition Published Sep 14, 2011 by Baron Schwartz in Databases, Writing at https://www.xaprb.com/blog/2011/09/14/high-performance-mysql-third-edition/ I have just signed the contract for High Performance MySQL, Third Edition. The third edition will include major updates and new content in these areas: Recent performance and reliability advances, particularly in MySQL 5
Blogs That Are Good Resources for MySQL Users Published Oct 22, 2010 by Baron Schwartz in Databases at https://www.xaprb.com/blog/2010/10/22/blogs-that-are-good-resources-for-mysql-users/ I keep a file of notes, one per line, for reference. The real reason is for source material if I ever write a 3rd edition of High Performance MySQL, but hardly a day goes by that I don’t look something up. At the
How to Find Per-Process I/O Statistics on Linux Published Aug 23, 2009 by Baron Schwartz in Databases, Open Source, Operations at https://www.xaprb.com/blog/2009/08/23/how-to-find-per-process-io-statistics-on-linux/ Newer Linux kernels have per-process I/O accounting and you can use the iotop tool to find out what’s performing I/O, but in many cases I’m trying to find the source of an I/O problem
I’m a Postgres User, as It Turns Out Published Nov 3, 2009 by Baron Schwartz in Databases at https://www.xaprb.com/blog/2009/11/03/im-a-postgres-user-as-it-turns-out/ Someone recently posted this to an email list as a sample of an interesting SHOW INNODB STATUS output: mysql> SHOW ENGINE INNODB STATUS\G _______ _______ |\ /|( ____ \( ____ \ | ) ( || ( \/| ( \/ | | | || (_____ | (__ | | | |(_____ )
How to Debug InnoDB Lock Waits Published Sep 18, 2007 by Baron Schwartz in Databases at https://www.xaprb.com/blog/2007/09/18/how-to-debug-innodb-lock-waits/ This article shows you how to use a little-known InnoDB feature to find out what is holding the lock for which an InnoDB transaction is waiting. I then show you how to use an undocumented feature to make this even easier with innotop. Backgro
Five Great Perl Programming Techniques to Make Your Life Fun Again Published Oct 5, 2006 by Baron Schwartz in Programming at https://www.xaprb.com/blog/2006/10/05/five-great-perl-programming-techniques-to-make-your-life-fun-again/ If you’re a programmer, you know the difference between a beginner and a master is the ability to write succinct code that does a great deal with very little work. If yo
The Innotop MySQL and InnoDB Monitor Published Jul 2, 2006 by Baron Schwartz in Databases, Open Source, Monitoring at https://www.xaprb.com/blog/2006/07/02/innotop-mysql-innodb-monitor/ MySQL and InnoDB expose lots of information about their internals, but it’s hard to gather it all into one place and make sense of it. I’ve written a tool to do that, and you are free to download and use it. This a
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