nginx0.6.36+php5.2.9+php-fpm
ab -n 2000 -c 2000 http://www.test.com/
i has many error
2009/05/23 16:00:30 [error] 24601#0: *81788 upstream prematurely closed connection while reading response header from upstream, client: 192.168.1.11, server: www.test.com, request: "GET / HTTP/1.0", upstream: "fastcgi://127.0.0.1:9000", host: "www.test.com"

can you help me?
thanks