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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoPlainText>Hi Laci,<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Thanks for your advice.<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>I think that the behavior you described for mark-freq is exactly what I'm trying to accomplish, but it doesn't seem to work. There must be some detail that I'm missing.<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>In my test, I've set mark-freq to 60 seconds for the destination heartbeat.log. When I watch (tail) heartbeat.log, I'm seeing this type of results:<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText> Oct 31 08:44:02 192.168.35.1 ...I am still here...<o:p></o:p></p><p class=MsoPlainText> Oct 31 08:45:03 syslog -- MARK --<o:p></o:p></p><p class=MsoPlainText> Oct 31 08:45:19 192.168.35.1 ...I am still here...<o:p></o:p></p><p class=MsoPlainText> Oct 31 08:46:19 syslog -- MARK –<o:p></o:p></p><p class=MsoPlainText> Oct 31 08:46:32 192.168.35.1 ...I am still here...<o:p></o:p></p><p class=MsoPlainText> Oct 31 08:46:40 192.168.35.1 ...I am still here...<o:p></o:p></p><p class=MsoPlainText> Oct 31 09:43:46 192.168.35.1 ...I am still here...<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>As you can see, the destination is not busy. Shouldn’t a MARK have happened at 08:47:40?<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>The “internal” mark-mode looked a bit complicated, but I’ll read it again.<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Thanks again,<o:p></o:p></p><p class=MsoPlainText>Gregg<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>-----Original Message-----<br>From: syslog-ng <syslog-ng-bounces@lists.balabit.hu> On Behalf Of Laszlo Szemere (lszemere)<br>Sent: Thursday, October 31, 2019 09:30<br>To: syslog-ng@lists.balabit.hu<br>Subject: Re: [syslog-ng] email alert on timeout</p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Hello Gregg,<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText> I think you are almost on the right track. A little addition to MARK messages:<o:p></o:p></p><p class=MsoPlainText> Syslog-ng's destinations will ONLY emit a mark message IF otherwise there will be no message at all from that destination, during a "mark-freq" time period.<o:p></o:p></p><p class=MsoPlainText> So if there is a message on the Destination, it will reset the "mark-freq" timer, and the interval starts again without sending any mark message. So during a normal work of a busy log path there should be no mark messages at all.<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText> One more thing: I don't know if it is intentional from you, but you can spare the whole "mark" file logic from your configuration in certain cases, if you use the "internal" mark-mode. Unfortunately I can not give you a direct link, but in the "global options" section of the administration guide: <a href="https://www.syslog-ng.com/technical-documents/doc/syslog-ng-open-source-edition/3.24/administration-guide/59#TOPIC-1298095"><span style='color:windowtext;text-decoration:none'>https://www.syslog-ng.com/technical-documents/doc/syslog-ng-open-source-edition/3.24/administration-guide/59#TOPIC-1298095</span></a> there is a chapter about "mark-mode"s.<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Best regards,<o:p></o:p></p><p class=MsoPlainText>Laci<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText><o:p> </o:p></p></div></body></html>