The SQL Server plan cache can be a good tool to use in identifying current performance issues and in looking for new ways to improve performance.
Improve SQL Server Performance by Looking at Plan Cache (Part 2)
Improve SQL Server Performance by Looking at Plan Cache (Part 1)
The SQL Server plan cache stores details on statements that are executed over time. Each time a statement executes, SQL Server will look inside the plan cache first to see if a plan already exists. If a plan exists, SQL Server will use that plan instead of spending time compiling a new plan. This ensures the engine operates efficiently.
100% Reproducible Builds in Go
This post was featured in our July 2015 anthology of most popular SolarWinds Database Performance Monitor (DPM) blog posts of all time. One of the nice things about Go is statically…
Godaemon, a Library to Daemonize Go Apps
At SolarWinds® Database Performance Monitor we have a specific need to daemonize one of our Go applications, which must safely run detached from terminals, with a working directory that won’t…
A tutorial on how to use Go’s database/sql package
We found ourselves wishing for a tutorial to complement the database/sql documentation in Go, so we wrote one and shared it on Github. Please send pull requests to contribute improvements!
Streaming Approximate Histograms in Go
If you’re looking at response time, what’s more useful: a mean or a percentile? Not sure? You probably know how to calculate the average or mean of a sample, but…
4 Statistical Process Control Rules That Detect Anomalies in Systems
Statistical Process Control (SPC), or using numbers or data to study the characteristics of our process to make it behave the way we want it to behave, has been around…
Quantifying Abnormal Behavior
At Velocity last week, I spoke about how we quantify abnormality in a system’s time-series metrics cheaply, in realtime, at high frequency. Note that this is not the same thing as…
Replacing Clever Code with Unremarkable Code in Go
Not too long ago, my primary programming language was Perl. I’ve written a lot of Perl, including some things that I think are quite clever. And therein lies the problem.…
How Does Adaptive Fault Detection Work? Does It Eliminate Thresholds?
In previous posts, I claimed that thresholds are a root of much evil in monitoring systems (not the root of all evil, but a root of much evil), and that…