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Percona Server for MySQL version 5.5.31-30.3
Percona is glad to announce the release of Percona Server for MySQL 5.5.31-30.3 on May 24, 2013 (Downloads are available here and from the Percona Software Repositories). Based on MySQL 5.5.31, including all the bug fixes in it, Percona Server 5.5.31-30.3 is now the current
[Read more...]Around month ago Facebook has announced the Linkbench benchmark that models the social graph OLTP workload. Sources, along with a very nice description of how to setup and run this benchmark, can be found here. We decided to run this benchmark for MySQL Server 5.5.30, 5.6.11 and Percona Server 5.5.30 and check how these servers will handle such OLTP workloads in the CPU and IO-bound cases. For this test we used a PowerEdge R720 box with a fast PCI-e flash card as storage.
By default linkbench dataset has 10M ids(after load of data size of datadir ~10GB). We used this dataset
[Read more...]After compiling Percona Server with TokuDB, of course I wanted to compare InnoDB performance vs TokuDB.
I have a particular workload I’m interested in testing – it is an insert-intensive workload (which is TokuDB’s strong suit) with some roll-up aggregation, which should produce updates in-place (I will use INSERT .. ON DUPLICATE KEY UPDATE statements for that), so it will produce all good amount of reads.
A few words about the hardware: I am going to use new the Dell PowerEdge R420 with two Intel(R) Xeon(R) CPU E5-2450 0 @ 2.10GHz, 48GB of RAM and SATA SSD: Kingston HyperX 3K 240 GB.
Workload: I will use two different schemas. The first schema is from sysbench, and
Percona Server with TokuDB
I was excited to see that TokuDB for MySQL from Tokutek is now open source. I believe this is a great technology and it was a significant restriction on the adoption when it was distributed only in a binary format with a proprietary license.
So I went and built Percona Server 5.5.30 with TokuDB’s storage engine. This is an experimental build and I am just going to play with it. The build procedure is somewhat complicated and confusing and this stage, so I want to share it with the entire MySQL
[Read more...]Percona Server for MySQL version 5.1.68-14.6
Percona is glad to announce the release of Percona Server 5.1.68 -14.6 on April 19, 2013 (downloads are available here and from the Percona Software Repositories). Based on MySQL 5.1.68, including all the bug fixes in it, Percona
[Read more...]One major problem in terms of MySQL performance that still stands in the way of InnoDB scalability is the trx_list scan on consistent read view creation. It was originally reported as a part of MySQL bug #49169 and can be described as follows. Whenever a connection wants to create a consistent read, it has to make a snapshot of the transaction states to determine which transactions are seen in the view later. To this end, InnoDB scans trx_list (i.e. the list of currently open transactions) and copies IDs of transactions that have not yet been committed at the
I enabled the InnoDB Lock Monitor in my MariaDB 5.5 instance (using XtraDB+ as the InnoDB – which is the default in MariaDB) and noticed that while the SHOW ENGINE INNODB STATUS was being logged to the error log, it wasn’t logging the “additional” lock information – it just looked like the plain ‘ole INNODB STATUS.
Long story short, Percona added a new variable so one has better control over what gets logged:
innodb_show_verbose_locks
If off (default), then the InnoDB Lock Monitor logs the normal INNODB STATUS, and if enabled, then it logs it with the extended lock information.
They also created another variable that goes along with this one (and the InnoDB Lock Monitor), which is:
innodb_show_locks_held
This
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I actually don’t remember exactly whether it was in 2006, 2007 or 2008 — but around that time the MySQL community had one of the greatest MySQL conferences put on by O’Reilly and MySQL. It was a good, stable, predictable time.
Shortly thereafter, the MySQL world saw acquisitions, forks, times of uncertainly, more acquisitions, more forks, rumors (“Oracle is going to kill MySQL and the whole Internet”) and just a lot of drama and politics.
And now, after all this time some 6 or 7 years later, it feels like a MySQL Renaissance. All of the major MySQL players are coming to the
[Read more...]For this post I’m going to shamelessly exploit the litany of technical problems SimCity players encountered earlier this month and a few examples of how Thread Pool for MySQL and Percona Server for MySQL can help to prevent such incidents.
Users of SimCity, a city-building and urban planning simulation video game, encountered network outages, issues with saving progress and problems connecting to the game’s servers following a new release a couple of weeks ago featuring a new engine allowing for more detailed simulation than previous games. During this same time, we happened to be testing the Thread Pool feature in Percona Server for MySQL, and I saw a connection of how
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Percona’s Kenny Gryp leads a recent MySQL workshop
Percona will be in Chicago and London the week of April 8th delivering two 2-day MySQL workshops. For our MPB readers, we are offering a 15% discount. Just use MPB15A when purchasing your tickets to one or both MySQL workshops.
Percona Server for MySQL version 5.6.10-60.2
Percona is glad to announce the release of Percona Server for MySQL 5.6.10-60.2 on March 14, 2013. (Downloads are available here and from the experimental Percona Software Repositories). Based on MySQL 5.6.10, including all the bug fixes in it, Percona Server 5.6.10-60.2 is the third ALPHA release
[Read more...]Percona Server for MySQL version 5.1.67-14.4
Percona is glad to announce the release of Percona Server for MySQL version 5.1.67-14.4 on March 8, 2013 (Downloads are available here and from the Percona Software Repositories). Based on MySQL 5.1.67, including all the bug fixes in it, Percona Server 5.1.67-14.4 is now the current stable release in the 5.1 series. All of Percona‘s
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Percona Server on the Nexus 7: Your own MySQL Database Server on an Android Tablet
Following Roel’s post, Percona Server on the Raspberry Pi: Your own MySQL Database Server , I thought what other crazy gadget can I run Percona Server on? And having an Asus Nexus 7 Android tablet I decided to give it a try.
Anything below contains a risk that you break your tablet if
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Percona Server Wins Developer Week 2013 Award; Named Top Innovator in SQL Technologies Category
Percona Server has won a 2013 DeveloperWeek Best of Tech award, being named Top Innovator in the SQL Technologies category!
We’re proud to accept this award, which is determined by a combination of peer voting and review from an independent panel of judges. Thank you to everyone who voted for Percona Server!
From our press release:
[Read more...]MySQL MHA by Oracle ACE Director Yoshinori Matsunobu is an excellent open source tool to help in providing HA with native MySQL replication. The installation however is dependent on some Perl packages and to the untrained eye this may be an issue if you are using Percona Server as your choice of MySQL implementation.
The MHA Node page requires the perl-DBD-MySQL package to be installed. The installation on RedHat/CentOS/Oracle Linux look like this:
$ sudo yum install perl-DBD-MySQL Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile * base: mirror.anl.gov * extras: mirror.anl.gov * updates: mirror.anl.gov Setting up Install Process Resolving[Read more...]
Just yesterday, I’m sure many saw Twitter opensourcing their MySQL implementation. It is based on MySQL 5.5 and the code is on Github.
For reference, the database team at Facebook has always been actively blogging, and keeping up their code available on Launchpad. Its worth noting that the implementation there is based on MySQL 5.0.84 and 5.1.
At Twitter, most of everything persistent is stored in MySQL – interest graphs, timelines, user data and those precious tweets themselves! At Facebook, its pretty similar – all user interactions like likes, shares, status updates, requests, etc. are
[Read more...]I know, I haven’t been posting much lately. 5.5 upgrades got postponed due to the new storage platform needing my immediate attention and being a speaker at the Percona Live conference in April also needs a lot of attention.
One of the things I want to try out is running multiple MySQL instances on the same machine. The concept remained in the back of my mind ever since I attended Ryan Thiessen’s presentation on the MySQL conference 2011 but we never actually got a proper usecase for it. Well, with the new storage platform it would be really beneficial so an excellent use case to try it out! So what have I been
[Read more...]At the company I work for we are still running Percona Server 5.1 in production and are slowly heading towards a Percona Server 5.5 rollout. It did take a lot of preparation in the past few months (write a my.cnf conversion script for example) and a lot of testing. A couple of machines already have been upgraded this week to 5.5 to compare performance and stability. So far the machines proved to be stable enough to keep them on 5.5 and even better: we already see a couple of benefits! However, the title wouldn’t have been blues if everything would have been a breeze, right? 
First problem we ran into was that our Cacti templates broke due to the changed InnoDB status output. So I headed towards the Cacti templates and looked in the issue tracker if the issue was already known.
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First of all, I wish you a happy new year.
Many things happened last year, it was really exciting to be involved in the MySQL ecosystem.
I hope this enthusiasm will be increased this year, up to you !
To start the year, I propose the MySQL[plus] Awards 2011
It will only take 5 minutes to fill out these polls.
Answer with your heart first and then with your experience with some of these tools or services.
Polls will be closed January 31, so, vote now !
For “other” answers, please, let me a comment with details.
Don’t hesitate to submit proposal for tools or services in the comments.
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As I wrote in the previous LRU followup the innodb_lru_dump_restore directive has the drawback that it only loads the LRU dumpfile after starting up. I’m happy to say that I’m not the only one who noticed that: Vadim Tkachenko noticed the same a few months back when he was integrating Galera replication and he filed a bugreport for it.
It now has been resolved as of Percona Server 5.1.59-13.0 and 5.5.16-22.0 (both released this morning) with the configuration directive innodb-blocking-lru-restore.
However
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Yesterday one of my colleagues pointed me to the innodb_lru_dump_restore variable available in the Percona MySQL Server distribution. See more about it here:
innodb_lru_dump_restore
LRU meaning that the list is in Least Recently Used order to make it easier to remove old items off the pages. Reading from the description it can be a very nice option for already running servers to maintain this list after startup, but it did not solve my immediate problem: I had to warm up two new freshly cloned read slaves on one of our busiest databases.
Normally I use mk-query-digest with the
[Read more...]Percona is glad to announce the release of Percona Server 5.5.13-20.4 on July 1st, 2011 (Downloads are available here and from the Percona Software Repositories).
Based on MySQL 5.5.13, Percona Server Percona Server 5.5.13-20.4 is now the current stable release in the 5.5 series. All of Percona’s software is open-source and free, all the details of the release can be found in the 5.5.13-20.4 milestone at Launchpad.
The
[Read more...]I don’t use many tools in my consulting practice but for the ones I do, I try to know them as best as I can. I’ve been using mk-query-digest for almost as long as it exists but it continues to surprise me in ways I couldn’t imagine it would. This time I’d like to share a quick tip on how mk-query-digest allows you to slice your data in a completely different way than it otherwise would by default.
Disclaimer: this only works when persistent connections or connection pools aren’t used and is only accurate when single mysql connection is used during execution of a request.
If you are seeking to reduce the load on the database server and [as a result] increase response time for some random user requests, you are usually
[Read more...]Have you ever seen BIG weird numbers in mk-query-digest report that just seem wrong? I have! Here’s one report I got today:
... # Attribute total min max avg 95% stddev median # ============ ======= ======= ======= ======= ======= ======= ======= # Exec time 5088s 1us 171s 2ms 467us 104ms 28us # Lock time 76s 0 3s 26us 69us 3ms 0 # Rows sent 9.80M 0 1.05M 3.50 0.99 642.32 0 # Rows examine 5.59G 0 82.56M 2.00k 0.99 97.41k 0 # Rows affecte 457.30k 0 2.62k 0.16 0.99 1.68 0 # Rows read 2.16G 0 82.56M 788.53 21.45 82.91k 0.99 # Bytes sent 2.14T 0 4.00G 781.27k 3.52k 47.84M 84.10 #[Read more...]
Percona Server version 5.1.55-12.6 is now available for download. It is now the current stable release version.
It’s finally here! Percona Server Percona Server 5.5.8-20.0 is now available for download. This is a beta release of Percona’s enhancements to the MySQL 5.5.8 server. Here are some highlights:
In addition to building on MySQL 5.5, here are the changes we’ve made from previous Percona Server releases:
I’ve seen this a handful of times: someone has trouble with their database performance, and they have heard that XtraDB is much faster than InnoDB. They build a custom-compiled server with XtraDB.
This is unfortunately missing the point a bit. If you have a server that is the same as normal MySQL, but you’ve replaced InnoDB by XtraDB, what do you have? Depending on the version of MySQL you’re using, you have somewhere between, say, 1.5x and 15x performance improvement, at best. Compared to what you could be getting, that is not much, because you’re missing the most important improvement in Percona Server: the ability to measure the server’s activity. In other words, with a faster server that you still can’t measure and diagnose easily, you have just painted yourself into a faster corner. Your
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