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2020-08-17
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Whether you’re searching for strategies, best practices, or industry news, our seasoned experts have created hundreds of helpful resources, filterable by content type, solution, platform, and author. To stay informed, join our email list to get content that matters to you.

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Guide

Commercial Clusters and Scalability

By Neil J. Gunther on June 1, 2010

In this paper we present an introductory analysis of throughput scalability for update intensive workloads (such as measured by the TPC-C or TPC-W benchmarks) and how that scaling is limited by serialization effects in the software-hardware combination that comprises any platform.

Guide

UNIX Load Average Part 1: How It Works

By Neil J. Gunther on February 7, 2010

In this online article Dr. Gunther digs down into the UNIX kernel to find out how load averages (the “LA Triplets”) are calculated and how appropriate they are as capacity planning metrics.

Guide

UNIX Load Average Part 2: Not Your Average Average

By Neil J. Gunther on February 7, 2010

This is the second in a two part-series where we explore the use of UNIX load averages in performance analysis and capacity planning.

Guide

UNIX Load Average: Reweighed

By Neil J. Gunther on February 7, 2010

This is an unexpected Part 3 to the discussion about the UNIX load average metric answering the question of where the weight factor comes from.

Guide

How to Get Unbelievable Load Test Results

By Neil J. Gunther on February 7, 2010

This article is about delusions that arise from incorrect interpretation of load test measurements.

Guide

Capacity Calculations: Handle with Care

By Neil J. Gunther on February 7, 2010

This paper discusses avoiding calculation results that are more precise than is justified by precision of corresponding measurement input data.

Guide

Let the Bridge Fall—As long as it falls on time

By Neil J. Gunther on February 6, 2010

Dissect the psychology of IT managers that prefer to let a project fail as long as it fails on time in this provocative article by Dr. Gunther.

Guide

Of Buses and Bunching: Strangeness in the Queue

By Neil J. Gunther on February 6, 2010

This article explains how correlated or bunched requests can impact capacity planning results.

Guide

How to Measure an Elephant

By Neil J. Gunther on February 6, 2010

This article explains how correlated or bunched requests can impact capacity planning results.

Guide

Evaluating Scalability Parameters: A Fitting End

By Neil J. Gunther on February 6, 2010

This is the final online article concerning the concept of application scalability. Here, you will learn how to determine value of the parameters that control scalability.

Guide

The “LA Triplets” Quiz

By Neil J. Gunther on February 6, 2010

This is a little quiz to test your understanding of the triplet of numbers that appear in the UNIX® load average (LA) performance metric.

Guide

How to Write Application Performance Agents in TeamQuest Performance Software 7.2 or 8

By Neil J. Gunther on February 5, 2010

TeamQuest (now Vityl Capacity Management) provides unintrusive mechanisms for instrumenting applications and analyzing application performance. Neil Gunther describes how to use those mechanisms.

Article

UNIX Load Average: An Addendum

By Neil J. Gunther on February 5, 2010

Clarifying the calc-load () function of the Linux kernel.

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