Howto kill a process in Mysql

If you have a “hanging” process in MySQL and want to kill it, you use show processlist to identify the process you want to kill get get the id. Then a simple kill ID will do the job.

mysql> show processlist;

+-----+------+-----------+---------+---------+-------+-------+------------------+
| Id  | User | Host      | db      | Command | Time  | State | Info             |
+-----+------+-----------+---------+---------+-------+-------+------------------+
| 882 | user | localhost | test    | Sleep   | 27111 |       | NULL             |
| 893 | user | localhost | test    | Sleep   |   453 |       | NULL             |
| 901 | user | localhost | NULL    | Query   |     0 | NULL  | show processlist |
+-----+------+-----------+---------+---------+-------+-------+------------------+
3 rows in set (0.00 sec)

mysql> kill 882

The same can be done using mysqladmin …

I'm pleased to announce the release of Spider storage engine version 3.0(beta) and Vertical Partitioning storage engine version 0.18(beta).
Thank you for waiting such a long time! This release includes my 1 year development.
Spider is a Storage Engine for database sharding.
http://spiderformysql.com/
Vertical Partitioning is a Storage Engine for vertical partitioning for a table.
http://launchpad.net/vpformysql

Please use the following for downloading binary file.
http://spiderformysql.com/download_spider.html

The main changes in this version are following.
Spider
- Support link to oracle tables.
  Connection from Spider to Oracle is now available by using …

This week, we discuss GTIDs in MySQL 5.6 and how they work with replication. In Ear Candy, we link to an extremely useful resource for complicated MySQL query patterns. In At the Movies, we present The Finer Art of Being a 'Senior' Employee.

Events
Oracle's upcoming webinars:
MySQL Security Enhancements and Important Security Tips for ISVs and OEMs on Thursday, February 21st.

MySQL Performance and Scalability in Spanish Thursday, February 28th.

read more

One of the most useful tools if you’re working with multiple versions of MySQL Servers is MySQL Sandbox which allows you to maintain many different versions of MySQL, Percona Server,MariaDB. If you’re just working with single sandbox you can just use MySQL Sandbox in its most basic way and it will work:

root@smt2:~/sandboxes# make_sandbox /tmp/Percona-Server-5.5.29-rel29.4-401.Linux.x86_64.tar.gz
unpacking /tmp/Percona-Server-5.5.29-rel29.4-401.Linux.x86_64.tar.gz
Executing low_level_make_sandbox --basedir=/tmp/5.5.29 \
        --sandbox_directory=msb_5_5_29 \
        --install_version=5.5 \
        --sandbox_port=5529 \
        --no_ver_after_name \
        --my_clause=log-error=msandbox.err
...
no_run                         =
no_show                        =
do you agree? ([Y],n) Y
loading grants
... sandbox server started
Your sandbox server was installed in $HOME/sandboxes/msb_5_5_29

…

In the same time of passionate debat of the best distribution MySQL vs MariaDB on a 120K Euro server(here), i wanted to share the story of drop of InnoDB insert performance for one of our client having a tables between 10 to 100 Billions rows.

In most case this size of table is just a no go in relationnel database.

So why it used to work so far  ?

c1 int, c2 tinyint, c3 mediumint, c4 binary(1), c5 float .
c2 avg cardinality 1000
c3 avg cardinality 10000
Very simple log table with optimized column type :

• Partition by range on c1 where c1 increase with loading date
• InnoDB compression 8K block size  

A first good metric when inserting 1 row

• Into a 1G partition we touch about 400 …

How To Configure Tungsten Connector For Load Balancing, Read/Write Splitting, Automatic Failover And Online Maintenance 

Tungsten clusters use the Tungsten Connector to ensure your applications transparently connect to the master. This enables fail over and seamless switching of masters for online maintenance. However, you can do far more. Tungsten Connector allows you to make better use of

The MySQL developer tools team announces the availability of version 5.2.47
of the MySQL Workbench GUI tool. This is a minor maintenance release, addressing a problem during data copy in databases with triggers, during migrations and server upgrades.

For a full list of issues fixed in this release, see the release notes.

Please get your copy from our Downloads site. In Windows, you can also
use the MySQL Windows Installer to update Workbench and other MySQL products.

Sources and binary packages are available for several platforms, including Windows, Mac OS X and Linux.

http://dev.mysql.com/downloads/workbench/

Workbench Documentation can be found …

If you are looking for some of the great blog posts of the week in database technologies like Oracle, SQL Server and MySQL, then Log Buffer #307 is the place to be. Enjoy.

Oracle:

When Jeremy Schneider writes, it stays written. He relishes and shares as how to troubleshoot OEM  12c Cloud Control Auto-Discovery.

Chris Kawalek informs that Oracle VM provides SAP customers with a fully supported and certified virtualization environment for the Oracle database.

Peter Lorenzen is hardening the Apache HTTP Server.

…

MySQL 5.6 has an impressive list of improvements. Among them, replication checksums caught my attention as it seems that many people misunderstand the real added value of this new feature. I heard people think that with replication checksums, data integrity between the master and its replicas is now enforced. As we’ll see, it’s not that easy.

First, here are a few common reasons why data integrity may be broken (the list is not exhaustive):

• writes executed on a replica instead of the master
• non deterministic queries
• bad use of replication filters
• rollback of transactions mixing transactional and non-transactional tables

The real problem is that replication may keep on running without error, not letting you know that all servers no longer have the same data.

Will replication checksums detect such problems? Unfortunately, no, they won’t.

That …

TempoDB’s timely DBaaS for the Internet of Things. ScaleBase 2.0. And more

For 451 Research clients: TempoDB has timely database service for the Internet of Things bit.ly/YcQuqA

— Matt Aslett (@maslett) February 13, 2013

For 451 Research clients: ScaleBase provides centralized management of distributed MySQL databases bit.ly/YcQTcs

— Matt Aslett (@maslett) February 13, 2013

For 451 Research clients: XtremeData turns its attention to cloud-based data warehousing bit.ly/XB7MLY

— Matt Aslett (@maslett) …