Database

Adaptive Fault Detection Versus Anomaly Detection

04/24/14 We get a lot of questions about what our Adaptive Fault Detection algorithm really is and how it works. Although I can’t tell you exact details, I want to explain a few th…

Join Our Team! We’re Hiring!

04/24/14 We’re Hiring! VividCortex has several open positions, both technical and non-technical. All of these positions are fulltime, based in Charlottesville, VA or Montevideo, Ur…

How to Fix Hangout Restrictions on Google Apps

04/16/14 We use Google Hangout all the time to conduct calls with employees, service providers, customers and pretty much anyone. It’s a great tool, and in our opinion more friendl…

VMDK versus RDM: Which One Do I Need for SQL Server?

03/26/14 When it comes to disk configuration options for virtualized servers running on VMware, you have two options: VMFS virtual file-based disk (VMDK) or a raw device mapping (R…

Multi-Threaded Replication in MySQL

03/17/14 For years, people lamented that MySQL’s replication was single-threaded. Peter, Vadim, and I griped about this in High Performance MySQL for two whole editions, as well as…

Performance Schema, Slow Query Log, and TCP Decoding

02/25/14 Peter Zaitsev posted Percona’s answer to the question, “why use the slow query log instead of the PERFORMANCESCHEMA tables to gather information about query execution and …

Hardware or Code? SQL Server Performance Examined

01/24/14 As DBAs with years of experience in a variety of environment between us, we each have seen that most database performance issues result not from lack of enough CPU power o…

A Tale of Two Memory Leaks in Go

01/15/14 In this post I’ll illustrate two ways I’ve accidentally caused slow but steady memory consumption in Go programs. The phrase “memory leak” isn’t really accurate, but I can…

How to Recover the Master Database in SQL Server 2012

01/14/14 In my seven years as a production DBA, I can count on one hand the number of times I have need to restore the master database as a result of a disaster. In other words, th…

Connect to Windows Azure Virtual Machine Using SSMS

12/18/13 In 2013, Microsoft made it available for customers to utilize virtual machines running in Windows Azure. This allowed customers to run an on-premises version of SQL Server…

Multitick: multiple-subscriber time.Ticker in Go

12/17/13 Many of our agent programs have several independent worker routines that all need to be timed on clock ticks, sometimes with a specific time offset. We recently open-sourc…

Analysis of PayPal’s Node-vs-Java benchmarks

12/09/13 I was interested in the data shown in PayPal’s blog post on switching from Java to Node.js, for two reasons. First, at a glance both sets of benchmark data looked very cle…