Many backup tools including Percona Xtrabackup, MyLVMBackup and others use FLUSH TABLES WITH READ LOCK to temporary make MySQL read only. In many cases the period for which server has to be made read only is very short, just few seconds, yet the impact of FLUSH TABLES WITH READ LOCK can be quite large because [...]
Keep your MySQL backend online no matter what + TGIF Contest!
October 7, 2011 By 2 Comments
On Oct. 25th I will be presenting my conference session “Keep your MySQL backend online no matter what” at the Percona Live London Conference. Considering their is a variety of highly knowledgeable MySQL experts speaking at this event I wanted to give my talk a special plug so you won’t miss THIS knowledgeable MySQL expert [...]
Ultimate MySQL variable and status reference list
January 8, 2011 By 4 Comments
I am constantly referring to the amazing MySQL manual, especially the option and variable reference table. But just as frequently, I want to look up blog posts on variables, or look for content in the Percona documentation or forums. So I present to you what is now my newest Firefox toolbar bookmark: an option and [...]
Onsite and Remote – getting best of both worlds
July 2, 2009 By 1 Comment
At Percona we provide services both Onsite – visiting the customers and Remote – logging in to their systems or communicating via email,phone,instant messaging. We believe both approaches have their benefits and drawbacks and mixing them right way allows you to get your problems solved most efficient way.
Percona is hiring performance experts
February 13, 2009 By 2 Comments
Percona is hiring. We’ve added several experts recently and we’re growing at a fast but sustainable pace. The demand for our services is strong, and we have openings for more experts in the next couple of months. Let me explain a little about what we’re looking for at the moment. While we do have a [...]
Living with backups
November 6, 2008 By 28 Comments
Everyone does backups. Usually it’s some nightly batch job that just dumps all MySQL tables into a text file or ordinarily copies the binary files from the data directory to a safe location. Obviously both ways involve much more complex operations than it would seem by my last sentence, but it is not important right [...]
Concurrent inserts on MyISAM and the binary log
May 14, 2008 By 7 Comments
Recently I had an interesting surprise with concurrent inserts into a MyISAM table. The inserts were not happening concurrently with SELECT statements; they were blocking and the process list was filling up with queries in Locked status. My first thought was that the customer had deleted from the table, which leaves “holes” in the middle [...]
Heikki Tuuri answers to Innodb questions, Part II
November 4, 2007 By 13 Comments
I now got answers to the second portions of the questions you asked Heikki. If you have not seen the first part it can be found here. Same as during last time I will provide my comments for some of the answers under PZ and will use HT for original Heikkis answer. Q26: You also [...]
Top 5 MySQL wishes – what is next ?
July 4, 2007 By 1 Comment
I’ve read through Top 5 (or more) wishes posted by number of MySQL employees as well as by a lot of community members. It was great to see so wide coverage as people with different backgrounds wish different things – Developers have some wishes to ease development process, MySQL DBAs would like stuff related to [...]
Wishes for mysqldump
May 22, 2007 By 19 Comments
Dealing with dumping and recovery of large and partially corrupted database I’ve got couple of feature ideas for mysqldump or similar tool and appropriate import tool Dump in parallel single thread dump is not efficient of course especially on systems with multiple CPUs and disks. It is lesser issue in recovery case because import takes [...]
