This is a followup to my previous post Apache Spark with Air ontime performance data.

To recap an interesting point in that post: when using 48 cores with the server, the result was worse than with 12 cores. I wanted to understand the reason is was true, so I started digging. My primary suspicion was that Java (I never trust Java) was not good dealing with 100GB of memory.

There are few links pointing to the potential issues with a huge HEAP:

http://stackoverflow.com/questions/214362/java-very-large-heap-sizes
…

This Log Buffer Edition begins with some great blog posts from Oracle, goes through SQL Server and then ends with MySQL.

Oracle:

• Ruby-oci8 is a ruby interface for an Oracle Database.
• Another python graph – one wait event.
• This article compares FBL and HDL – two of the commonly used data loading tools in Fusion HCM to highlight key differences and similarities.
• Better Data Modeling: Customizing Oracle …

How Uber’s infrastructure works with Schemaless, the datastore using MySQL that’s kept Uber Engineering scaling since October 2014. This is part two of a three-part series on Schemaless; part one is on designing Schemaless.

In Project Mezzanine: …

The post The Architecture of Schemaless, Uber Engineering’s Trip Datastore Using MySQL appeared first on Uber Engineering Blog.

Last week I got an assignment where I need to install MySQL server on client’s machine, after checking the system requirements, I came to know that, the machine contains the 64 bit windows operating system. So I thought to download MySQL community server for windows 64 bit operating system, but I found that the website provides only 32 bit installer for windows, and for 64 bit operating system, the website provides the zip file for download. My client needs to manage the MySQL products by himself; he was expecting software where he can manage all MySQL products at one place, so we need MySQL installer in that machine. So I decided to install MySQL server on windows machine using MySQL installer web community. In this post, let me go through the step by step guide to install MySQL server on windows machine.
After reading this completely you can answer the following question:

• How and where to get MySQL community edition? …

If you are working on laravel and you want to do like How to redirect back to previous url After login after login user you can redirect his previous page as he was before you can do this i would like to give you two example first example is using intended and second one is using session but

MySQL 5.7 makes secure connections easier with streamlined key generation for both MySQL Community and MySQL Enterprise, improves security by expanding support for TLSv1.1 and TLSv1.2, and helps administrators assess whether clients are connecting securely or not with new visibility into connection types.  Extending this emphasis on secure connections, MySQL Server 5.7 introduces a new server-side configuration option allowing MySQL administrators the ability to restrict connections …

Earlier today advisories were sent out regarding OpenSSH versions 5.4 through 7.1., informing users about a security bug in the software. In essence, the advisory instructed people to add the  

UseRoaming no

 option to their ssh_config file, with a promise for further information to be made available shortly.

Add undocumented "UseRoaming no" to ssh_config or use "-oUseRoaming=no" to prevent upcoming #openssh client bug CVE-2016-0777. More later.

— markus (@msfriedl) January 14, 2016

The post on the security issue at OpenBSD Journal can be seen here: http://undeadly.org/cgi?action=article&sid=20160114142733 …

Transport Layer Security (TLS, also often referred to as SSL) is an important component of a secure MySQL deployment, but the complexities of properly generating the necessary key material and configuring the server dissuaded many users from completing this task.  MySQL Server 5.7 simplifies this task for both Enterprise and Community users.  Previous blog posts have detailed the changes supporting Enterprise builds; this blog post will focus on parallel improvements made to MySQL Community builds.

Introducing …

Hi all, it is time again to do another preview release of MySQL Group Replication, the plugin that brings multi-master update everywhere to MySQL, like we described in Hello World post.

We are very proud to do the sixth preview release of MySQL Group Replication, version 0.7.0 based on MySQL Server 5.7.10, which introduces new exciting features, please enjoy the highlights!…

you want to count domain from your email address field in mysql if you are working on PHP then you could do easily by using explode function and counting domains but that way is a very bad logic and it take max time on execution when you have lot of data But we can do easily in MySQL by using SUB