Generic troubleshooting processes: Difference between revisions

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=== <u>TCP Zero window</u> ===
=== <u>TCP Zero window</u> ===
For identifying application performance problems and/or server capacity issues, the “TCP Zero Window” graph is a very, very powerful instrument.
For identifying application performance bottlenecks and/or server capacity issues, the “TCP Zero Window” graph is a very, very powerful instrument.


Here’s why…
Here’s why…
TCP zero window packets are being sent out by a client or (mostly) server, whenever it cannot optimally handle the oncoming traffic any more.
TCP zero window packets are being sent out by a server (or client), whenever it cannot optimally handle the oncoming traffic any more.


Because of whatever reason, its receive buffer is full, and the device will start every sending party to slow down – by means of TCP zero packets.
Basically the servers' (or clients') receive buffer gets full and so it will notify every sending party to slow down – by means of TCP zero packets.




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