nginx+php5-fpm, периодически валятся сайты

2015/11/16 12:50:30 [error] 20443#0: *6901598 recv() failed (104: Connection reset by peer) while reading response header from upstream, client: 192.168.1.1, server: my.server.ru, request: "GET / HTTP/1.1", upstream: "fastcgi://127.0.0.1:8888", host: "my.server.ru", referrer: "http://my.server.ru/url/97612/"

server {
	listen 192.168.1.5:80;

	server_name my.server.ru *.client.my.server.ru;
	access_log /var/www/logs/my.server.ru-access.log combined;
	error_log /var/www/logs/my.server.ru-error.log error;
	root /var/www/my.server.ru/public/;
	fastcgi_read_timeout 1200;
	location ~* ^/(cms|srv)/.+\.(php|php3|php4|php5|phps|pl|pm|html)$ {
	root /var/www/my.server.ru/public/;
	}
	location ~ \.php$ {
		try_files $uri =404;
		fastcgi_split_path_info ^(.+\.php)(/.+)$;
		fastcgi_index index.php;
		fastcgi_pass 127.0.0.1:8888;
                fastcgi_read_timeout 650;
		fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
		include /etc/nginx/fastcgi_params;
	}