Author: Jim
Time series analysis of workload isolation strategies
By now you have figured out that I really like time series plots of transactional data with log scale latencies as a visual representation of workloads. Taking this a step further, we can overlay colo... Read More
Troubleshooting system performance with time series scatter plots
The use of time series scatter plots can provide far more insight into system performance when compared to using typical average latencies and cumulative throughput rates. These scatter plots a... Read More
Stack metrics for analyzing system performance
Stack over lays of time series data System performance testing relies (or should rely) on the aggregation of large amounts of data from a variety of sources within the supporting infrastructure. It... Read More
Good old Big O
Big Oscar is a good mutt. He’ll even tolerate dress up.... Read More
Comparing software release performance data
One challenge we face in summarizing end of release performance findings is how do you effectively illustrate release to release performance in a concise visual manner? One method I have been experime... Read More
Tonja hates bugs
No words needed for this sequence.... Read More
multiple Airport AP’s; improving coverage
I’ve been a proponent of using separate devices for wireless home access and general purpose firewall/networking. I’ve deployed a VPN/firewall and a 24 port gigabit green switch as the f... Read More
home storage with FreeNAS
I’d been searching for a centralized storage solution on and off for a few years, but I finally got serious about it in the Summer of 2010. While searching around, I came across FreeNAS (http:... Read More
Visualizing DB2 buffer pool characteristics
This plot is a time series representation of the use of micro plots to illustrate the sizing decisions DB2’s memory manager is making for sizing multiple buffer pools (left series of plots, x-ax... Read More
Mean lookin’ bird
Never knew a peacock could look so tough…... Read More
Visualizing experimental output trends over time
I’ve been working with startups in various states of product maturity to establish sound scientific methods for characterizing the application workloads. Most of my process recommendations focus... Read More