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Date/Time: Thu, 28 Mar 2024 20:06:42 +0000



Post From: Data Pausing After Detecting No Activity - Network Still Connected

[2020-09-18 23:30:40]
User240019 - Posts: 112
I was referring to this;
ServerSendBufferSizeInBytes=655, which I thought indicated latency.

Can you explain, does this mean that the TCP window is full and the recipient host cannot recieve and so theire's queuing? Or what does it mean, in technical terms?

BTW, I double checked another SC user and indeed his buffer size was generally 0 and low for a period of time and mine continues to be anywhere from 0 to 7000...I've seen lots of variability, which makes not a ton of sense according to the TCP protocol. The thing is, there's no contention for my network interface, based on my analysis of the performance monitor. The latency at my NIC was 80-100ms, no excessive disk, or ram. However, I will say that my machine grinds hard while live data is going on. It's something I noticed some time ago as a change, but just chalked it up to "things change"...

So, then the TCP stream must be being contended with upstream. As I said before I double checked this on another machine, on a separate network, closer to the egress. Same problem. So - my initial thought is, either, there's local contention that can cross a routed network (internally)...HIGHLY unlikely. The ISP has a contention issue that is as of yet undetected and is beneath the radar of having high speed and getting in the way of random TCP streams...(improbable, but not impossible) or there is a configuration specific connection to SC. The server connection is definitely fast, but that doesn't mean the users who are complaining don't have something in common.

I have a network technician coming Saturday, but I don't have high hopes as he's unlikely to see the contention...The problem would have to exist in a hardware configure or signal strenth that's undetectable from their NOC.

Except for the question at the top, I'm just reasoning this out in the hopes that it will help me or others troubleshoot.