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Category Archives for "case study"

Nov 29

Troubleshooting Slow FTP Uploads

By Kary | case study

Here’s a case study from email subscriber Peter in troubleshooting slow FTP uploads. Scenario: The video team uploads video files via FTP to The Cloud and after a recent firewall replacement, the performance has dropped off by a large amount Now, Peter had already figured out the issue so kudos to him. He even said […]

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Aug 16

Troubleshooting a One-Way Performance Issue

By Kary | case study

Here’s a fun case study on troubleshooting a one-way performance issue. Of course, the root cause for every one-way performance issue won’t be the same as this one, but it’s a bit of experience to add to your bag. It’s very important when analyzing packets to take on the perspective of the host from which you […]

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Apr 14

Solving Tomcat Throughput Issues on Windows

By Kary | case study

Here’s another real world example of troubleshooting performance problems. An email subscriber, Simon, contacted me about poor Tomcat throughput on Windows 2008R2 – whenever Tomcat served a large file, download speed sucked. To Simon’s credit, he eliminated “the network” by verifying that Apache and IIS did not have the same issue. Here’s where a mediocre network […]

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Aug 03

Case Study: All Web Pages Load Slooooowly

By Kary | case study

So far I’ve mostly shown you concepts and techniques to analyze performance. Well, now I’m gonna solve a real world problem with packet analysis and walk you through it how I did it. Brandon joined the PacketBomb email list and we were email chatting about packet analysis. He mentioned a problem he was trying to […]

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