I posted earlier in the year how to configure a Fedora instance to test PHP code on a local VM. However, I’ve got a few questions on how to find those posts. Here’s a consolidation with links on those steps:

1. Go to this blog post and install the httpd and php libraries with the yum installer.
2. In the same blog post as step 1 (you can put the sample PHP code into the /var/www/html directory for testing), connect to the yum shell and remove the php-mysql library and then install the mysqlnd library.
3. Go to this blog …

When you work with complicated queries, especially ones which contain subqueries, it is easy to make a typo or misinterpret column name. While in many cases you will receive a 

column not found

 error, sometimes you can get strange results instead.

Like finding 4079 countries in Antarctica:

mysql> select count(*) from City where CountryCode in (select CountryCode from Country where Continent = 'Antarctica');
+----------+
| count(*) |
+----------+
|     4079 |
+----------+
1 row in set (0.05 sec)

Or not finding any cities in Georgia:

mysql> select Name, Language from City join CountryLanguage using (CountryCode) where CountryCode in (select Code from Country where District='Georgia' and Continent='Asia');
Empty set (0.18 sec)

I used a standard …

Data is the most important asset any organization has especially those who belongs to web, mobile, social, enterprise and cloud applications.

Availability refers to the ability to cope with, and if necessary recover from, failures on the host, including failures of MySQL, the operating system, or the hardware and maintenance activity that may otherwise cause downtime.

Because each application has different operational and availability requirements, MySQL offers a range of certified and supported solutions, delivering the appropriate levels of High Availability (HA). 

Factors to consider for HA Solution: 

• Operational Capabilities
• Budgetary Constraints
• The level of availability required (In terms of Time)
• The type of application being deployed
  • Mission critical services …

I am a MySQL DBA role as usual check the problems and seek a solution.
On one of the production host (MySQL v5.1.53), I started getting errors in this series:

[Note] Slave I/O thread: Failed reading log event, reconnecting to retry, log 'binlog.000942' at postion 45042

[ERROR] Error reading packet from server: Lost connection to MySQL server during query ( server_errno=2013)

[Note] Slave I/O thread: Failed reading log event, reconnecting to retry, log 'binlog.000928' at postition

[ERROR] Error reading packet from server: Lost connection to MySQL server during query ( server_errno=2013)

…

Some expert says you should increase the slave_net_timeout and some says to check value of  relay_log_space_limit but it is default already

slave_net_timeout = 3600
relay_log_space_limit = 0 (unlimited) 
max_allowed_packet = 128MB

I can see no heavy queries …

In a recent blog post my colleague Roy presented his work for MySQL 5.7 that makes the query optimizer merge sub-queries in the  FROM clause (so-called derived tables) with the outer query.  I will in this blog post show an example of how this work improves the performance of a MySQL query.…

MySQL Cluster Manager 1.4.0 is available for download from My Oracle Support.

More details are available in the the MCM 1.4.0 Release Notes.

Updated documentation is available here……

The MySQL server is a large multi-threaded program primarily written in the C++ programming language.  Unfortunately,  data races and deadlocks in concurrent C++ programs are common.  Fortunately, the Thread Sanitizer can be used to find data races and deadlocks.  MySQL 5.7 does not support the Thread Sanitizer, but is is easy to add to the MySQL configuration using a simple build procedure.  When MySQL 5.7 is built with the Thread Sanitizer and database …

This post explains on the usage of mysql_repair_threads for repairing myisam table & the processlist status Repair with N threads

The post corrupted / crashed MyISAM + mysql_repair_threads = stuck “Repair with N threads” first appeared on Change Is Inevitable.

Hello dear readers and attendees,

This is the post that I will be/ will have been referencing during my presentation to the Seattle Central Community College’s Byte club on Thursday, December 10th at 1500-1630.

I will begin with a bit of an autobio and find out what kind of students we have in attendance. Please feel free to comment if you’d like to keep in touch before or after the presentation. I will discuss some of the bits and pieces of some industry standard platforms which I’ve developed, deployed, maintained, managed, co-operated, administered and replaced. We can discuss some of the patterns that work well in the industry, and some that are a bit harder to tame.

Once we have touched most of the areas of specialization represented at the meeting, I will dive in to an AngularJS demo I am developing in github here:

…

Swift is now opensource, and it’s interesting to see Craig Federighi talk about it. This is Apple doing right, considering FaceTime is long overdue to being an open standard. People are nitpicking on Apple’s Open Source tagline, but really, this is akin to nitpicking on Mark Zuckerberg donating 99% of his Facebook stock to his new limited liability corporation charity (key: don’t look a gift horse in the mouth).

Apple has chosen to put …