A Database Administrator experiences a wide range of emotions. It could be one those endless meetings, friendly disagreements with fellow developers, getting something approved from managers or preparing your junior DBAs for bigger battles. Each day is a challenging one. We’ve tried to compile a list of GIFs which every DBA will be able to relate to.

5 minutes before deployment

Writing the most epic answer Stack Exchange has ever seen and press F5 to “Submit” and end up refreshing the page

When a DBA.StackExchange answer gets 500+ upvotes!

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Introduction

Fortran (FORmula TRANslating System) is a general-purpose, imperative programming language that is especially suited to numeric computation and scientific computing. History of FORTRAN can be tracked late 1953 when John W. Backus submitted a proposal to his superiors at IBM. The First FORTRAN compiler appeared in April 1957.

Some notable historical steps where:

• FORTRAN II in 1958
• FORTRAN III in 1958,
• FORTRAN IV in 1962.
• FORTRAN 66 or X3.9-1966 become the first industry-standard
• FORTRAN 77 or X3.9-1978. This is the version of the Fortran I learned 1996.
• Fortran 90 was released as ISO/IEC standard 1539:1991 and ANSI Standard in 1992
• Fortran 95 was released as ISO/IEC standard 1539-1:1997
• Fortan 2003 was released as ISO/IEC 1539-1:2004
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thanks Daniel, updated this in post.

Locking is important in many scenarios to prevent other sessions from modifying tables during periods when a session requires exclusive access to them. for example altering table definition online or any kind of table definition changes. Mysql provides an option to lock table/s with different types of locks, depends on need.

syntax for lock table:

LOCK TABLES
    tbl_name [[AS] alias] lock_type
    [, tbl_name [[AS] alias] lock_type] ...

lock_type:
    READ [LOCAL]
  | [LOW_PRIORITY] WRITE

UNLOCK TABLES

Following are the examples for READ and WRITE LOCK:

READ LOCK:

session1> create table t1( c1 int);
Query OK, 0 rows affected (0.06 sec)

session1> insert …

While I previously blogged about installing Netbeans 8, some of my students would prefer to use the Eclipse IDE. This post shows how to install and configure Eclipse IDE, include the mysql-connector-java.jar, and write Java to access the MySQL.

You can download Eclipse IDE and then open it in Fedora’s Archive Manager. You can use the Archive Manager to Extract the Eclipse IDE to a directory of your choice. I opted to extract it into my student user’s home directory, which is /home/student.

After extracting the Eclipse IDE, you can check the contents of the eclipse directory with the following command:

ls -al eclipse

You should see the following:

While our engineering team is working on finalizing the TokuMXse storage engine, I want to provide an experimental build that you can try and test MongoDB 3.0 with our storage engine.

It is available here
percona.com/downloads/TESTING/Percona-TokuMXse-rc5/percona-tokumxse-3.0.3pre-rc5.tar.gz

To start MongoDB with TokuMXse storage engine use:

mongod --storageEngine=tokuft

I am looking for your feedback!

The post MongoDB with Percona TokuMXse – experimental build RC5 is available! appeared first on MySQL Performance Blog.

This Log Buffer Edition picks, choose and glean some of the top notch blog posts from Oracle, SQL Server and MySQL.

Oracle:

• The standard images that come with devstack are very basic
• Oracle is pleased to announce the release of Oracle VM VirtualBox 5.0 BETA 3
• Monitoring Parallel Execution using Real-Time SQL Monitoring in Oracle Database 12c
• Accessing your Cloud Integration API end point from Javascript
• Are You Ready for The Future of …

We discussed in an earlier post how to design indexes for many types of queries using a single table. Here is a real-world example of the challenges you will face when trying to optimize queries: two similar queries, but one is performing a full table scan while the other one is using the index we specially created for these queries. Bug or expected behavior? Read on!

Our two similar queries

# Q1
mysql> explain select col1, col2 from t where ts >= '2015-04-30 00:00:00';
+----+-------------+---------------+------+---------------+------+---------+------+---------+-------------+
| id | select_type | table         | type | possible_keys | key  | key_len | ref  | rows    | Extra       |
+----+-------------+---------------+------+---------------+------+---------+------+---------+-------------+
|  1 | SIMPLE      | t …

The query sniffer tool will capture TCP traffic for your server and decode the protocol. It will decode the queries and output them in MySQL’s slow query log format, giving you fresh insight into your database performance. Fill out the form below to receive your free downloadable tool.

The query sniffer tool will capture TCP traffic for your server and decode the protocol. It will decode the queries and output them in MySQL’s slow query log format, giving you fresh insight into your database performance. Fill out the form below to receive your free downloadable tool.