by Martin.FarachColton | May 24, 2011 | MySQL
OldSQL DBs based on B-trees have some well-known problems and workarounds. TokuDB is a NewSQL storage engines based on Fractal Tree indexing, so the natural question is how InnoDB practice translates into TokuDB. This post gives a quick overview. Enjoy! FAQ Q: How do...
by Fernando Ipar | Apr 7, 2011 | Insight for Developers, MySQL
I recently worked on a customer case where at seemingly random times, inserts would fail with Innodb error 139. This is a rather simple problem, but due to it’s nature, it may only affect you after you already have a system running in production for a while....
by Martin.FarachColton | Apr 7, 2011 | MySQL
Hot Column Addition and Deletion (HCAD) In the previous HCAD post, I described HCAD and showed that it can reduce the downtime of column addition (or deletion) from 18 hours to 3 seconds. In fact, the downtime of InnoDB is proportional to the size of the database,...
by Martin.FarachColton | Apr 5, 2011 | MySQL
From 31 minutes to 2 seconds Hot Indexing Overview TokuDB v5.0 introduces several features that are new to the MySQL world. Recently, we posted on HCAD: Hot Column addition and Deletion. In this post, we talk about Hot Indexing. What happens when you try to add a new...
by Martin.FarachColton | Mar 30, 2011 | MySQL
From 18 hours to 3 seconds! Hot Column Addition and Deletion (HCAD) Overview TokuDB v5.0 introduces several features that are new to the MySQL world. In this series of posts, we’re going to present some information on these features: what’s the feature,...
by Martin.FarachColton | Mar 11, 2011 | MySQL
In Part 1, and Part 2 of this series, I presented some thoughts on partitioning. I heard some great feedback on why people use partitioning. Here, I present a flow chart that summarizes what I’ve learned. In summary: with TokuDB in the picture there’s...
by Peter Zaitsev | Feb 3, 2011 | Insight for DBAs, MySQL
I’ve been working with an application which does a lot of CREATE and DROP table for Innodb tables and we’ve discovered DROP TABLE can take a lot of time and when it happens a lot of other threads stall in “Opening Tables” State. Also contrary...
by Tokutek | Feb 1, 2011 | MySQL
Links to the FAQ Sections can be found here: General Information Open Source Technical Details Best Practices and Tools General Information ANY CHARACTER HERE 1. What is TokuDB? TokuDB is an ACID compliant storage engine for MySQL that is specifically designed for...
by Vadim Tkachenko | Jan 13, 2011 | Benchmarks, MySQL
In my recent benchmarks, such as this one about the Virident TachIon card, I used different values for innodb_buffer_pool_size, like 13GB, 52GB, and 144GB, for testing the tpcc-mysql database with size 100G. This was needed in order to test different memory/dataset...
by Peter Zaitsev | Jan 12, 2011 | Insight for DBAs, MySQL
You might know if you have long running transactions you’re risking having a lot of “garbage” accumulated in undo segment size which can cause performance degradation as well as increased disk space usage. Long transactions can also be bad for other...
by Peter Zaitsev | Jan 7, 2011 | Benchmarks, MySQL
I again work with the system which needs high insertion rate for data which generally fits in memory. Last time I worked with similar system it used MyISAM and the system was built using multiple tables. Using multiple key caches was the good solution at that time and...
by Morgan Tocker | Dec 25, 2010 | Insight for DBAs, MySQL
Inspired by Baron’s earlier post, here is one I hear quite frequently – “If you enable innodb_file_per_table, each table is it’s own .ibd file. You can then relocate the heavy hit tables to a different location and create symlinks to the...
by Fred Linhoss | Dec 13, 2010 | MySQL, Percona Software
Percona XtraBackup 1.5-Beta is now available for download. This release adds additional functionality to Percona XtraBackup 1.4, the current general availability version of XtraBackup. This is a beta release. Functionality Added or Changed Support for MySQL 5.5...
by Peter Zaitsev | Dec 11, 2010 | Insight for DBAs, MySQL
I wanted for a while to write about using MySQL Partitioning for Performance Optimization and I just got a relevant customer case to illustrate it. First, you need to understand how partitions work internally. Partitions are on the low level are separate table. This...
by Peter Zaitsev | Dec 9, 2010 | Insight for DBAs, MySQL
Understanding how well your tables and indexes fit to buffer pool are often very helpful to understand why some queries are IO bound and others not – it may be because the tables and indexes they are accessing are not in cache, for example being washed away by...
by Peter Zaitsev | Dec 9, 2010 | Insight for DBAs, MySQL
Innodb/XtraDB tables do benefit from being reorganized often. You can get data physically laid out in primary key order as well as get a better feel for the primary key and index pages, and so use less space, it’s just that MySQL OPTIMIZE TABLE might not be the...
by Vadim Tkachenko | Nov 29, 2010 | MySQL, Percona Events
Erin and Mike, organizers of SF Meetup generously invited me to talk on coming SF Meetup on Dec-14 about new features in InnoDB in MySQL 5.1 and 5.5 and, what is pay attention to, when you upgrade from MySQL 5.0. Although I personally mostly in 5.1->5.5 upgrade area,...
by Peter Zaitsev | Nov 22, 2010 | MySQL, Percona Events
I do not know if it is because we’re hosting a free webinar on migrating MyISAM to Innodb or some other reason but recently I see a lot of questions about migration from MyISAM to Innodb. Webinar will cover the process in a lot more details though I would like...
by Fred Linhoss | Nov 22, 2010 | MySQL, Percona Software
Percona XtraBackup 1.4 is now available for download. Version 1.4 fixes problems related to incremental backups. If you do incremental backups, it’s strongly recommended that you upgrade to this release. Functionality Added or Changed Incremental backups have...
by Justin Swanhart | Nov 15, 2010 | Insight for Developers, MySQL
Preamble: On performance, workload and scalability: MySQL has always been focused on OLTP workloads. In fact, both Percona Server and MySQL 5.5.7rc have numerous performance improvements which benefit workloads that have high concurrency. Typical OLTP workloads...
