How to increase queue size via system tunable

[MarekAndreansky]

Re: sonewconn: pcb Listen queue overflow

I have followed the steps in the topic above and found that "lighttpd_p" has a queue size of 128 while it is constantly at 193 connections.

I do not know why but before investigating I wanted to increase the queue size by using kern.ipc.soacceptqueue and setting it to 512

The tunable was not listed under Advanced > System Tunables so I added it and applied, but the queue size has not increased.

Did I use the correct tunable?

[kiokoman]

yup, and it's working for me

[2.4.4-RELEASE][root@pfSense.localdomain]/root: netstat -L4an
Current listen queue sizes (qlen/incqlen/maxqlen)
Proto Listen                           Local Address
tcp4  0/0/128                          *.7445
[2.4.4-RELEASE][root@pfSense.localdomain]/root: sysctl kern.ipc.soacceptqueue=512
kern.ipc.soacceptqueue: 128 -> 512
[2.4.4-RELEASE][root@pfSense.localdomain]/root: netstat -L4an
Current listen queue sizes (qlen/incqlen/maxqlen)
Proto Listen                           Local Address
tcp4  0/0/512                          *.7445

check from console with

sysctl -a | grep kern.ipc.soacceptqueue

if the value is realy 512
you need to stop the service and start again, probably a restart of the service is not enough

[MarekAndreansky]

You are right, I restarted the service and the new settings were applied.

Makes me wonder thou why lighttpd in combination with pfblockerNG had over 100 sessions opened for one ip address hours after I disconnected the device from the network.