Hi, I wrote that program and ran it and it did managed to keep a steady rate of about 1,000 events per minute even when the Kibana's total events per minute dropped from 60,000 to 6,000. However, when the Kibana's total events per minute dropped to zero, my program got a "connection refused" exception. I ran netstat -s and found out that every time the Kibana's line hit zero the number of RX-DRP increased. At that point I understood that I forgot to mention that this server has a 10GbE nic. Is it possible that the packets are being dropped because of some bufferis filling up? If so, how can I test it and verify that this is actually the case? If it is, how can I solve it?
Thanks, Yuval. On Wednesday, February 11, 2015, Yuval Khalifa <iyuv...@gmail.com> wrote: > Hi. > > When you say "see how the file behaves" I'm not quite sure what you mean > by that... As I mentioned earlier, it's not that events do not appear at > all but instead, the RATE at which they come decreases, so how can I > measure the events rate in a file? I thought that there's another way that > I can test this: I'll write a quick-and-dirty program that will send an > event to the ELK via TCP every 12ms which should result in events rate of > about 5,000 events per minute and I'll let you know if the events rate > continues to drop or not... > > > Thanks, > Yuval. > > On Tuesday, February 10, 2015, Itamar Syn-Hershko <ita...@code972.com > <javascript:_e(%7B%7D,'cvml','ita...@code972.com');>> wrote: > >> I'd start by using logstash with input tcp and output fs and see how the >> file behaves. Same for the fs inputs - see how their files behave. And take >> it from there. >> >> -- >> >> Itamar Syn-Hershko >> http://code972.com | @synhershko <https://twitter.com/synhershko> >> Freelance Developer & Consultant >> Lucene.NET committer and PMC member >> >> On Tue, Feb 10, 2015 at 7:47 PM, Yuval Khalifa <iyuv...@gmail.com> wrote: >> >>> Great! How can I check that? >>> >>> >>> On Tuesday, February 10, 2015, Itamar Syn-Hershko <ita...@code972.com> >>> wrote: >>> >>>> The graphic you sent suggests the issue is with logstash - since the >>>> @timestamp field is being populated by logstash and is the one that is used >>>> to display the date histogram graphics in Kibana. I would start there. I.e. >>>> maybe SecurityOnion buffers writes etc, and then to check the logstash >>>> shipper process stats. >>>> >>>> -- >>>> >>>> Itamar Syn-Hershko >>>> http://code972.com | @synhershko <https://twitter.com/synhershko> >>>> Freelance Developer & Consultant >>>> Lucene.NET committer and PMC member >>>> >>>> On Tue, Feb 10, 2015 at 7:07 PM, Yuval Khalifa <iyuv...@gmail.com> >>>> wrote: >>>> >>>>> Hi. >>>>> >>>>> Absolutely (but since that in the past I also worked at the helpdesk >>>>> dept. I certainly understand why it is important to ask those "Are you >>>>> sure >>>>> it's plugged in?" questions...). One of the logs is comming from >>>>> SecurityOnion which logs (via bro-conn) all the connections so it must be >>>>> sending data 24x7x365. >>>>> >>>>> Thanks for the quick reply, >>>>> Yuval. >>>>> >>>>> On Tuesday, February 10, 2015, Itamar Syn-Hershko <ita...@code972.com> >>>>> wrote: >>>>> >>>>>> Are you sure your logs are generated linearly without bursts? >>>>>> >>>>>> -- >>>>>> >>>>>> Itamar Syn-Hershko >>>>>> http://code972.com | @synhershko <https://twitter.com/synhershko> >>>>>> Freelance Developer & Consultant >>>>>> Lucene.NET committer and PMC member >>>>>> >>>>>> On Tue, Feb 10, 2015 at 6:29 PM, Yuval Khalifa <iyuv...@gmail.com> >>>>>> wrote: >>>>>> >>>>>>> Hi, >>>>>>> >>>>>>> We just installed an ELK server and configured the logstash >>>>>>> configuration to match the data that we send to it and until last month >>>>>>> it >>>>>>> seems to be working fine but since then we see very strange behavior in >>>>>>> the >>>>>>> Kibana, the event over time histogram shows the event rate at the normal >>>>>>> level for about a half an hour, then drops to about 20% of the normal >>>>>>> rate >>>>>>> and then it continues to drop slowly for about two hours and then stops >>>>>>> and >>>>>>> after a minute or two it returns to normal for the next half an hour or >>>>>>> so >>>>>>> and the same behavior repeats. Needless to say that both the >>>>>>> /var/log/logstash and /var/log/elasticsearch both show nothing since the >>>>>>> service started and by using tcpdump we can verify that events keep >>>>>>> coming >>>>>>> in at the same rate all time. I attached our logstash configuration, the >>>>>>> /var/logstash/logstash.log, the /var/log/elasticsearch/clustername.log >>>>>>> and >>>>>>> a screenshot of our Kibana with no filter applied so that you can see >>>>>>> the >>>>>>> weird behavior that we see. >>>>>>> >>>>>>> Is there someone/somewhere that we can turn to to get some help on >>>>>>> the subject? >>>>>>> >>>>>>> >>>>>>> Thanks a lot, >>>>>>> Yuval. >>>>>>> >>>>>>> -- >>>>>>> You received this message because you are subscribed to the Google >>>>>>> Groups "elasticsearch" group. >>>>>>> To unsubscribe from this group and stop receiving emails from it, >>>>>>> send an email to elasticsearch+unsubscr...@googlegroups.com. >>>>>>> To view this discussion on the web visit >>>>>>> https://groups.google.com/d/msgid/elasticsearch/c2e5a524-1ba6-4dc9-9fc3-d206d8f82717%40googlegroups.com >>>>>>> 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