3 out of 10 TCP burst connections get stuck in SYN_SENT.
by Maswood from LinuxQuestions.org on (#5GHPA)
I am trying to run a web proxy in Debian Buster. But while testing performance I saw only 7 or 8 parallel connections got established at a time, to narrow down the issue is not with my web proxy; i ran IPERF on the debian and from another linux client i ran iperf -c <debian buster IP> -P 10; the test do not run successfully.
If i change -P from 10 to 7, things are fine.
On the Debian Buster Side, I see connections stuck in SYN_SENT state with UNREPLIED status.
From netstat, I see,
<x> times the listen queue of a socket overflowed
<y> SYNs to LISTEN sockets dropped
where x and y are Equal.
Tried changing the TCP Backlog, SYN Backlog and disabled timestamp etc, nothing helped.
Any suggestions ?
If i change -P from 10 to 7, things are fine.
On the Debian Buster Side, I see connections stuck in SYN_SENT state with UNREPLIED status.
From netstat, I see,
<x> times the listen queue of a socket overflowed
<y> SYNs to LISTEN sockets dropped
where x and y are Equal.
Tried changing the TCP Backlog, SYN Backlog and disabled timestamp etc, nothing helped.
Any suggestions ?