Hi, I was doing a little bit of testing with syslog-ng today, and I think that with a very small log_fifo_size() it was dropping messages but not telling me. If I set my log_fifo_size to 1, here are the results: [jshaw@ars1dev7 ~/syslog-ng-2.0.9/tests/loggen]$ ./loggen -r 1000000 -s 1024000 -I 60 localhost 2000 average rate = 96.48 msg/sec, count=5789 [jshaw@ars1dev7 ~/syslog-ng-2.0.9/tests/loggen]$ ls -lh /ita/jshaw/messages -rw------- 1 jshaw ita 101M Jul 1 13:30 /ita/jshaw/messages However, 1024000 * 5789 = 5.9 GB Grepping for drop messages in the output file: [jshaw@ars1dev7 ~/syslog-ng-2.0.9/tests/loggen]$ grep -i drop /ita/jshaw/messages returns nothing. I have stats_freq(5) in my config file, and that messages file is the only output. I do have other statistical lines, which imply to me that no messages are dropped: Jul 1 13:49:52 s_local@ars1dev7 syslog-ng[6344]: Log statistics; processed='center(queued)=6045', processed='center(received)=6045', processed='destination(d_file)=6045', processed='source(s_local)=6045' But it seems clear to me that they are -- or loggen is lying. With more normal log_fifo_sizes (100, 2000) the throughput rates from loggen are lower and the file sizes match. Any ideas? Thanks, Joe