my websites always shows "error, The page you are looking for is temporarily unavailable." if the traffic going high,, lets say more than 500 visitors.. and then i open my error.log, here is inside it..:


2010/04/21 08:27:31 [alert] 3789#0: *1581265 socket() failed (105: No buffer space available) while connecting to upstream, client: 203.128.250.8, server: ceriwis.us, request: "GET /image.php?u=1682&dateline=1264986938 HTTP/1.1", upstream: "fastcgi://127.0.0.1:9000", host: "ceriwis.us", referrer: "http://ceriwis.us/showthread.php?t=65"
2010/04/21 08:27:32 [alert] 3789#0: *1581509 socket() failed (105: No buffer space available) while connecting to upstream, client: 110.139.208.156, server: ceriwis.us, request: "GET / HTTP/1.1", upstream: "fastcgi://127.0.0.1:9000", host: "ceriwis.us"
2010/04/21 08:27:32 [alert] 3789#0: *1581197 socket() failed (105: No buffer space available) while connecting to upstream, client: 125.163.46.19, server: ceriwis.us, request: "POST /chat/getxml.php?session_inst=1 HTTP/1.1", upstream: "fastcgi://127.0.0.1:9000", host: "ceriwis.us"

what does it mean?? what is the problem? anyone know how to fix this problem? is this related with worker_process in configuration? i set my worker_process because i only have 1 processor... can i set up the worker_process to 4 if i only have 1 processor??