足りないと overflow kernel: sonewconn: pcb 0xfffff801104b4620: Listen queue overflow: 193 already in queue awaiting acceptance 標準だと128 kern.ipc.soacceptqueue (default: 128) # netstat -Lan Current listen queue sizes (qlen/incqlen/maxqlen) Proto Listen Local Address tcp4 0/0/128 *.80 tcp6 0/0/128 *.80 増やす # sysctl kern.ipc.soacceptqueue=4096 # vi /etc/sysctl.conf ==== kern.ipc.soacceptqueue=4096 ==== # /