Planet MySQL Planet MySQL: Meta Deutsch Español Français Italiano 日本語 Русский Português 中文
10 Newer Entries Showing entries 31 to 40 of 16899 10 Older Entries

Displaying posts with tag: mysql (reset)

Ruby-MySQL Program
+0 Vote Up -0Vote Down

After you install Ruby and build the Rails framework, you need to create the mysql gem. This blog post shows you how to create the mysql gem and how to write a simple Ruby program that queries the MySQL database.

The first step creates the mysql gem for Ruby programming:

yum install mysql

It should show you the following:

Fetching: mysql-2.9.1.gem (100%)
Building native extensions.  This could take a …
  [Read more...]
Capacity planning and QPS
+0 Vote Up -0Vote Down

As much as I like the technology from in-memory DBMS vendors like MemSQL, VoltDB and MySQL Cluster I am amused at some of the marketing that describes capacity planning as a function of QPS. It usually isn't true that when a workload has a peak QPS of X and the peak per-server QPS for the product is Y, then X/Y nodes is sufficient. The Oracle  …

  [Read more...]
JSON Labs Release: JSON Functions, Part 2 — Querying JSON Data
Employee_Team +0 Vote Up -0Vote Down

The MySQL 5.7.7 JSON Lab release introduces a native JSON datatype. In part 1 of this blog post series, Rick Hillegas introduced the new functions for creating and manipulating JSON documents using the new native JSON data type. In this blog post we will be using some of the same sample tables and JSON documents as in part 1, so it will be helpful to read that blog post now, if you haven’t already.

Here we look closer at the functions provided to search …

  [Read more...]
JSON Labs Release: JSON Functions, Part 1 — Manipulation JSON Data
Employee_Team +0 Vote Up -0Vote Down

The MySQL 5.7.7 JSON Lab release introduces a native JSON datatype. See Knut Anders Hatlen’s blog post for more details on this new datatype. In this release we also introduced a number of functions for creating and querying JSON documents. In this post we’ll explore the following new functions related to manipulating JSON documents:

  • jsn_array()
  • jsn_object()
  • jsn_insert()
  • jsn_remove()
  [Read more...]
JSON Labs Release: Native JSON Data Type and Binary Format
Employee_Team +0 Vote Up -0Vote Down

In the MySQL 5.7.7 JSON labs release, we have introduced a new data type for storing JSON data in MySQL tables. Now you can do this:

mysql> CREATE TABLE employees (data JSON);
Query OK, 0 rows affected (0,01 sec)

mysql> INSERT INTO employees VALUES ('{"id": 1, "name": "Jane"}');
Query OK, 1 row affected (0,00 sec)

mysql> INSERT INTO employees VALUES ('{"id": 2, "name": "Joe"}');
Query OK, 1 row affected (0,00 sec)

mysql> select * from employees;
+---------------------------+
| data                      |
+---------------------------+
| {"id": 1, "name": "Jane"} |
| {"id": 2, "name": …
  [Read more...]
The MySQL SYS Schema in MySQL 5.7.7
Employee_Team +6 Vote Up -0Vote Down

New in MySQL 5.7.7, the MySQL sys schema (originally the ps_helper project) is now included by default within the MySQL server!

For those unfamiliar with the `sys` schema project, it is a database schema with a set of objects (views, stored procedures, stored functions, and table with a couple of triggers on it) that were implemented to give easy, human readable, DBA and Developer based use case access to the wealth of …

  [Read more...]
Measuring the impact of tcpdump on Very Busy Hosts
+1 Vote Up -0Vote Down

A few years back Deva wrote about how to use tcpdump on very busy hosts. That post sparked my interest about exploring how to measure the impact of tcpdump on very busy hosts. In this post, I wanted to highlight how much of an impact there really is and what options you have to make the query collection much more effective.

Some things you need to know:

  • The test is a sysbench read-only workload, 8 tables, 8 threads, 1000000 rows each with 16G of buffer pool. Dataset fully in memory.
  • sysbench …
  [Read more...]
WebScaleSQL 5.6.24 is built and ready to test
+0 Vote Up -0Vote Down

On Tuesday  Steaphan Greene  announced that all currently-pushed changes have now been rebased onto the newly-released upstream MySQL-5.6.24.


The new branch at this point is available on github.

Our .deb and .rpm builds are available in the PSCE …


  [Read more...]
Improved ALTER USER syntax support in 5.7
Employee +1 Vote Up -0Vote Down

Complimenting the expanded CREATE USER syntax introduced in MySQL Server 5.7.6 is more useful ALTER USER syntax.  Before MySQL Server 5.7.6, ALTER USER could only be used to expire a user’s password.  That’s pretty limited.  With changes made in MySQL Server 5.7.6, a better distinction is made between privilege-level …

  [Read more...]
Install Ruby on Fedora
+0 Vote Up -0Vote Down

I use a Fedora 20 VM image to teach Oracle and MySQL technology. Last week, I expanded the Fedora VM image to support a full LAMP stack. This blog shows you how to install Ruby on Fedora and successfully generate the Rails gems.

Connect as the root user and use yum to install the libraries. My approach is by library or small groups. Naturally, you start with the ruby library.

yum install ruby

You will see the following:

Loaded plugins: langpacks, refresh-packagekit
mysql-connectors-community …
  [Read more...]
10 Newer Entries Showing entries 31 to 40 of 16899 10 Older Entries

Planet MySQL © 1995, 2015, Oracle Corporation and/or its affiliates   Legal Policies | Your Privacy Rights | Terms of Use

Content reproduced on this site is the property of the respective copyright holders. It is not reviewed in advance by Oracle and does not necessarily represent the opinion of Oracle or any other party.