‘No buffer space available’ error on FreeBSD
‘No buffer space available’ ussualy happended on a high traffic FreeBSD servers. The reasons of that error is the request of socket buffer (send/recv) is higher than maximum socket buffer.
Default value of them are
kern.ipc.maxsockbuf: 262144
net.inet.tcp.recvspace: 65536
net.inet.tcp.sendspace: 32768