Many TIME_WAIT TCP Connection on Windows

[turtleold]

Hi, everybody

There is a problem with a large number of TCP connections in the TIME_WAIT state.
In version Zabbix 5.4.4 it seems like the problem has been fixed.

Configurable TCP queue maximum size


A new configuration parameter ListenBacklog has been added to Zabbix server, Zabbix proxy, and Zabbix agent (Unix/Windows) configuration. This optional parameter can be used to specify the maximum number of pending connections in the TCP queue.

Updated the server version to 5.4.9 on Ubuntu 20.04. Updated the Windows version of the Agent to 5.4.9. But the number of TCP connections still remains in large numbers.

The ListenBacklog value is set to 1

What other ideas are possible in this situation?

[V.botta]

if I'm not mistaken you can set it between 1 and 30, where 1 is the default. I solved it by setting it to 10.

[turtleold]

if I'm not mistaken you can set it between 1 and 30, where 1 is the default. I solved it by setting it to 10.

From 0 to infinity

####### For advanced users - TCP-related fine-tuning parameters #######

## Option: ListenBacklog
# The maximum number of pending connections in the queue. This parameter is passed to
# listen() function as argument 'backlog' (see "man listen").
#
# Mandatory: no
# Range: 0 - INT_MAX (depends on system, too large values may be silently truncated to implementation-specified maximum)
# Default: SOMAXCONN (hard-coded constant, depends on system)
ListenBacklog=1

[turtleold]

Does no one really know what to do with it? I don't have any ideas left myself...