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Guillaume Savary

Guillaume Savary
Guillaume is leading PerformanceVision's Research and Development team

Recent Posts

How to diagnose TCP Session Closing and disconnections



TCP Series #2: TCP Closing a SESSION

Here is a second article of a series covering all you need to know to troubleshoot performance issues impacting applications relying on the TCP Protocol.

After studying how TCP sessions are established we will now see what can go wrong when closing a TCP sessions. 

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Topics: performance diagnostic, Network troubleshooting, TCP, network analysis

How to diagnose TCP Connection set up issues


TCP Series #1: What can go wrong in a TCP Handshake?

Here is a first article of a series covering all you need to know to troubleshoot performance issues impacting applications relying on the TCP Protocol. 

Let's have a look at how TCP sessions are established... and what can go wrong! 

Read More

Topics: TCP

Application transactions in real time for performance troubleshooting


Why capturing application transaction real time?

Network-aware NPM solutions have provided a visibility into TCP level performance; having a broad view of whether the degradations comes from the network conditions, the server processing time or the quantity of data sent back and forth still has value.

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Topics: APM

TTFB (Time To First Byte) - A metric to use with precaution



Definition: The TTFB (Time To First Byte) is a metric in network metrology. It is the time elapsed between the opening of a TCP connection between a client and a server, and receipt by the client of a first packet with payload from the server.

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Topics: performance troubleshooting, APM

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