Why are there more concurrent users after upgrading to SGOS 6.5 or 6.6 ?

Products

• ProxySG Software - SGOS

Issue/Introduction

Customer upgraded from SGOS 6.2 to 6.5 or 6.6.

In SGOS 6.2, there were average 500 concurrent users at peak everyday. After upgrading to 6.5 or 6.6, there are around 800 users.

Cause

Comparison of the Active User List (/tcp/users)

 In SGOS 6.5 and 6.6, the user is kept in this list for 2 minutes after it is terminated. 

User	Proxy-Connections	Open-Proxy-Connections	Open-Proxy-Connections High Watermark(last 2mins)	ADN-Connections
10.1.1.100	0	0	1	0

 
In SGOS 6.2 and 6.4 it doesn't contain the high watermark statistics. The user is removed from this list as soon as the connection is closed. 

User	Proxy-Connections	ADN-Connections
10.1.1.100	1	0

 

Hint:
User - IP address of user
Proxy-Connections - number of open proxied connections plus entries in the time wait state
Open-Proxy-Connections - Number of proxied connections that are currently open
Open-Proxy-Connections High Water Mark (last 2mins) - Maximum number of open proxied connections in the last 120 seconds
ADN-Connections - number of connections for the Application Delivery Network

Resolution

An enhancement was made in SGOS 6.7 that TCP connections in Time Wait state are not counted for in Proxy-Connections because TCP flows in Time Wait state should not consume the number of available connections for users.