( I hope I don't offend anyone with an attachment, it's only 8k. ) My largest single-server syslog-ng implementation currently handles over 13M lines per day, totalling about 1.8Gb per day. I've only recently been able to gather this data by creating a process to count incoming lines, sum their lengths, and report via syslog at 1 minute intervals. See attached graph ( if the attachment survived ). I added this configuration before all other entries to make sure it sees everything: <syslog-ng.conf> destination syslog-perf { program(syslog-perf); }; log { source(syslog); destination(syslog-perf); }; </syslog-ng.conf> I originally tried this in Perl, then Bash, but neither could keep up with the incoming messages. This works like a champ. It compiles on Linux. The output format is specific to my syslog-to-rrd implementation, but you get the idea. It is suitable for an installation that is assured of at least 1 message for each reporting interval! <syslog-perf.c> #include <stdio.h> #include <time.h> #include <syslog.h> #define BUFFER_SIZE 8192 #define REPORT_INTERVAL 60 void main(void) { char buf[BUFFER_SIZE]; long count, bytes; time_t lastupdate; lastupdate = time(NULL); while (fgets(buf, BUFFER_SIZE, stdin)) { count++; bytes += (strlen(buf) - 1); if (time(NULL) > (lastupdate + REPORT_INTERVAL)) { openlog("127.0.0.1", LOG_NDELAY, LOG_LOCAL3); syslog(LOG_INFO, "Syslog-ng\\Lines=%d Syslog-ng\\Bytes=%d", count, bytes); closelog(); lastupdate += REPORT_INTERVAL; count = 0; bytes = 0; } } } </syslog-perf.c>
