Like every year since I joined Percona, I also plan to speak at the next Percona Live Conference & Expo in Santa Clara during spring 2016.
Once again I want to share with the users, DBAs and developers my experience related to MySQL High Availability and especially with Galera.
This year, Percona implemented a Community Vote to rate the talks you would like to see in the schedule. So if you want to attend one or more of my talks, please vote for them.
Of course, I invite you to rate other people's talk too, that will help the organisation and the Conference Committee to prepare the schedule.
These are the direct links to my talks and tutorial:
As I needed to compile it, with just some more minutes I could create a rpm package. So here is the RPM for CentOS 6.x 64bit.
This is the announcement on mysqlperformance blog.
I needed to have this feature for a customer running an older version of Percona Server (5.5.33-31.1), so I back ported the plugin (revision 654) removing some extra info that is not available on previous version of Percona Server.
The information above in struct mysql_event_general (include/mysql/plugin_audit.h) were not yet present:
Additionally, as I needed to parse the audit log quickly, I added a new format (CSV) to replace both implementation of XML output (OLD & NEW).
This is an example of the new output:
AUDIT_RECORD - Audit::35531_2014-05-07T06:15:32::2014-05-07T06:15:36 UTC::5.5.33-31.1::--basedir=/usr --datadir=/var/lib/mysql --plugin-dir=/usr/lib64/mysql/plugin --user=mysql --log-error=/var/lib/mysql/percona1.err --pid-file=/var/lib/mysql/percona1.pid::x86_64-Linux AUDIT_RECORD - Connect,35532_2014-05-07T06:15:32,2014-05-07T06:16:04 UTC,1,0,root,root,,,localhost, AUDIT_RECORD - Query::35533_2014-05-07T06:15:32::2014-05-07T06:16:04 UTC::1::0::select @@version_comment limit 1::root[root] @ localhost  AUDIT_RECORD - Query::35534_2014-05-07T06:15:32::2014-05-07T06:16:20 UTC::1::0::SELECT DATABASE()::root[root] @ localhost  AUDIT_RECORD - Init DB::35535_2014-05-07T06:15:32::2014-05-07T06:16:20 UTC::1::0::(null)::root[root] @ localhost  AUDIT_RECORD - Query::35536_2014-05-07T06:15:32::2014-05-07T06:16:20 UTC::1::0::show databases::root[root] @ localhost  AUDIT_RECORD - Query::35537_2014-05-07T06:15:32::2014-05-07T06:16:20 UTC::1::0::show tables::root[root] @ localhost  AUDIT_RECORD - Field List::35538_2014-05-07T06:15:32::2014-05-07T06:16:20 UTC::1::0::::root[root] @ localhost  AUDIT_RECORD - Field List::35539_2014-05-07T06:15:32::2014-05-07T06:16:20 UTC::1::0::::root[root] @ localhost  AUDIT_RECORD - Query::35540_2014-05-07T06:15:32::2014-05-07T06:16:23 UTC::1::0::show databases::root[root] @ localhost  AUDIT_RECORD - Query::35541_2014-05-07T06:15:32::2014-05-07T06:16:27 UTC::1::0::SELECT DATABASE()::root[root] @ localhost  AUDIT_RECORD - Init DB::35542_2014-05-07T06:15:32::2014-05-07T06:16:27 UTC::1::0::(null)::root[root] @ localhost  AUDIT_RECORD - Query::35543_2014-05-07T06:15:32::2014-05-07T06:16:29 UTC::1::0::show tables::root[root] @ localhost  AUDIT_RECORD - Query::35544_2014-05-07T06:15:32::2014-05-07T06:16:34 UTC::1::0::select * from t::root[root] @ localhost 
The patch is available below and the compiled plugin for Centos 6 x86_64 for Percona Server 5.5.33-rel31.
Update: I've now added the code in launchpad and changed the default audit format to CVS, so the first time the plugin is loaded, CVS is used and no need to restart mysqld to enable CVS.
At Percona Live MySQL Conference & Expo (PLMCE), I had the honor to receive a MySQL Community Award for the "Community Contributor of the year 2014". I was so proud and still I am.
This is the reason why I received it: Frederic organizes the MySQL & Friends Devroom at FOSDEM every year. He worked towards making a true community driven event participated by all key players. in 2014 the MySQL & Friends devroom also presented a shared booth/stand regrouping Oracle, MariaDB/SkySQL and Percona engineers and developers.
But this Award can't be only mine, I need to share it with all people that helped me in this adventure and that makes it possible. FOSDEM MySQL & Friends Devroom is maybe now the second best event in Europe after Percona Live UK (PLUK).
I'm sorry, "apologies upfront" (some people will understand this sentence), but I'll now thanks all the people that deserves it and the list is long:
- FOSDEM, for the acceptance of the MySQL & Friends Devroom every year since 2009.
- Kris sdog Buytaert, who encouraged me to give my first talk in the MySQL Devroom in 2010.
- Lenz Grimmer, to have run the devroom at the beginning
- Giuseppe @datacharmer Maxia, for having helped me and introduced me to key players in the Community to be able to create every year a strong Committee with people of different companies and opensource projects
- Colin @bytebot Charles, for having participate to all these devrooms as visitor, speaker and committee member (and congratulation for the Award too)
- Sergey Petrunia who also helped me the first year I was in charge of the devroom
- Henrik @h_ingo Ingo, who was a model for me in how he represented the Open Source in the MySQL ecosystem (you can come back whenever you want)
- Oracle, Tungsten, SkySQL, MariaDB, Percona to have allowed their engineers to travel, speak and share the booth with each others
- All committee members
- All speakers (2014, 2013,2012)
- All attendees
- and last but not least the Percona Belgian Team, Liz @lizztheblizz van Dijk, Dimitri @dim0 Vanoverbeke and Kenny @gryp Gryp who supported me for the logistic and organized a wonderful Community Dinner this year.
Again thank you everybody, this award is our award to all of us !
I will be present in Prato (Firenze), Italy Thursday and Friday (September 19th and 20th) to deliver 2 presentations at OSS4B:
- Installing and managing MySQL like a real devops: automation in production
- Introduction to Percona XtraDB Cluster
If you want to learn about these projects or discuss anything related to MySQL and Percona, join the conference and don't hesitate to come to talk to me. I will be very happy to answer your questions.
Ci vediamo in Prato !
My colleague Kenny hit a bug with Innotop and MySQL 5.6. He submitted a bug with a patch.
This is a new pre-release rpm of Innotop (1.9.0-3) that includes that patch.
Enjoy it !
[UPDATE] New rpms are now available directly on Innotop's download page
For my first participation to THE MySQL event of the year, I have the honour of delivering a full day tutorial on Opetational DBA in a nutshell with my two Belgian colleagues (call us the be-team ;) ) and a lighting talk related to MySQL database schema migration: how to version them and manage those operations.
If you don't want to miss THE essential event of the MySQL ecosystem, use code "SpeakMySQL" at checkout for 15% off!
Register here: http://bit.ly/14au67Z.
See you soon there !
On very heavy load, you may have issue with a large amount of TCP in TIME_WAIT like this one:
tcp 0 0 127.0.0.1:59035 127.0.0.1:3306 TIME_WAIT
This can lead to a TCP port exhaustion as explained on this post.
On HA proxy since version 1.4.19, you can use the nolinger option also on TCP backends. This terminate the connection (TCP RST) as soon as the loadbalancer finished the communication.
The counter part is that Aborted_clients status counter in MySQL increases with each connections' end. This counter becomes then useless.
This option is not available on glb (with -l parameter) if you apply the patch attached to this post.
I provide also rpm package with the patch applied :
Name : glb Version : 0.9.2 Release : 2 Architecture: x86_64 Install Date: (not installed) Group : Productivity/Networking/Routing Size : 208489 License : GNU General Public License version 2 or later (GPL v2 or later) Signature : (none) Source RPM : glb-0.9.2-2.src.rpm Build Date : mer 27 fév 2013 17:15:54 CET Build Host : percona1 Relocations : (not relocatable) URL : http://www.codership.com/products/galera-load-balancer Summary : TCP Connection Balancer Description : glb is a simple user-space TCP connection balancer made with scalability and performance in mind. It was inspired by pen, but unlike pen its functionality is limited only to balancing generic TCP connections. Features: * list of backend servers is configurable in runtime. * supports server "draining", i.e. does not allocate new connections to server, but does not kill existing ones, waiting for them to end gracefully. * on Linux 2.6 and higher glb uses epoll API for ultimate performance. * glb is multithreaded, so it can utilize multiple CPU cores. In fact even on a single core CPU using several threads can significantly improve performance when using poll()-based IO. * connections are distributed proportionally to weights assigned to backend servers. * this is a patched version providing SO_LINGER
[root@macbookair ~]# glbd -K -l --threads 6 --control 127.0.0.1:4444 127.0.0.1:3308 127.0.0.1:3306 glb v0.9.2 (epoll) Incoming address: 127.0.0.1:3308 , control FIFO: /tmp/glbd.fifo Control address: 127.0.0.1:4444 Number of threads: 6, max conn: 493, policy: 'least connected', top: NO, nodelay: ON, keepalive: OFF, defer accept: OFF, verbose: OFF, linger: ON, daemon: NO Destinations: 1 0: 127.0.0.1:3306 , w: 1.000 Router: ------------------------------------------------------ Address : weight usage map conns 127.0.0.1:3306 : 1.000 0.000 N/A 0 ------------------------------------------------------ Destinations: 1, total connections: 0 of 493 max Pool: connections per thread: 0 0 0 0 0 0
If you test it please post a comment.
If you followed previous post about init script (here and here) for Percona XtraDB Cluster, I proposed a new solution to standardize the bootstrap of the cluster in debian/ubuntu and redhat/centos instead of using 2 different ways.
You can read about this on launchpad bug #1152764.
So now to start the first node of a cluster when no other node is already running, you just need to use bootstrap command with the init script like bellow:
# /etc/init.d/mysql bootstrap Starting MySQL (Percona XtraDB Cluster)..... SUCCESS!
I attached the patches here too.
So I rewrote that patch to not work as the init script of RedHat/CentOS but more like it should work on Debian,
Now to initialize the cluster, on the very first node that will start the cluster, you need to run the following command:
root@percona1:/etc/init.d# /etc/init.d/mysql initialize * Starting MySQL (Percona XtraDB Cluster) database server and initialize the cluster mysqld [ OK ] * Checking for corrupt, not cleanly closed and upgrade needing tables.
Please note, the new command initialize.
I hope this patch is better for Debian afficionados ;-)