> 2. nginx.conf: The default value for this in nginx is: `listen $port [backlog=511]`
$ ss -lnt State Recv-Q Send-Q Local Address:Port Peer Address:Port LISTEN 0 511 *:9180 *:* And the real `running nginx's backlog` value is: MIN(net.ipv4.tcp_max_syn_backlog, net.core.somaxconn, nginx's listen backlog) YuanSheng Wang <[email protected]> 于2020年4月15日周三 下午5:06写道： > > 1. System parameters: > > We can write it in the user installation manual. > > > 2. nginx.conf: > > How about changing the default value of `backlog` to 512? > > According to the current hardware and network, this value is better. > > > On Wed, Apr 15, 2020 at 3:56 PM hui li <[email protected]> wrote: > > > APISIX backlog is currently the default value(Usually 128), and it is > prone > > to packet loss in the listen queue and semi-link queue in large > concurrent > > scenarios. > > > > APISIX is based on nginx. The backlog value of nginx is determined by two > > system configurations and one configuration value in nginx.conf: > > 1. System parameters: > > sysctl net.ipv4.tcp_max_syn_backlog > > sysctl net.core.somaxconn > > 2. nginx.conf: > > default_server backlog > > > > How to check the backlog size of APISIX process? > > Use the 'ss -lnt' command > > > > > -- > *MembPhis* > My github: https://github.com/membphis > Apache APISIX: https://github.com/apache/incubator-apisix >
