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Modes and Modality
It is a truth universally acknowledged that the average is the index of central tendency. But what if the tendency isn’t central? I’ve worked many performance issues where the latency or response time...
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Memory Leak (and Growth) Flame Graphs
Memory Leak Memory Flame Graph Your application memory usage is steadily growing, and you are racing against time to fix it. This could either be memory growth due to a misconfig, or a memory leak...
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The TSA Method
TSA Method in class (SmartOS) There are two basic performance analysis methodologies you can use for most performance issues. The first is the resource-oriented USE Method, which provides a checklist...
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Systems Performance: available now
My new book Systems Performance: Enterprise and the Cloud is shipping now from your favorite online book supplier (informIT, amazon). Thanks to those who have ordered a copy! I’ve already received...
View ArticleBenchmarking the Cloud
Benchmarking, and benchmarking the cloud, is incredibly error prone. I provided guidance though this minefield in the benchmarking chapter of my book (Systems Performance: Enterprise and the Cloud);...
View ArticleAnother 10 Performance Wins
Following on from my earlier 10 performance wins post, here is another group of 10 I have worked on. # Target Analyzed Key Tool Fixed Specific Improvement 11 redis System DTrace System scheduler 41% 12...
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