[syslog-ng] syslog-ng[3933]: STATS: dropped 1074

hi all I am using syslog-ng and php-syslog-ng with mysql to store logs on fedora core 4. i installed it using RPM for fedora 4. it is being used as a central loging server.in /var/log/messages a message appeares regularly "syslog-ng[3933]: STATS: dropped 1027".what does this message means, is it dropping messages comming from other servers.if i have done something wrong. i have attached syslog-ng configuration file. Thanks & Regards Ashish Tyagi