Hello, we've made another test , just making some subscriptions (so, no retained messages involved) .
Nothing changed: the cpu has reached very quickly 100% of usage! Attached the new jstack output. Looking at jstack output it seems that artemis tries to check on retained messages also if there aren't retained messages ... Can you confirm this "strange" behaviour of Artemis ? Alessandro ZANNINI Project Leader Portale My Home e Sviluppo Applicazioni WEB Tel: +(39)0332272966 Ext 9966 Indirizzo: V.le Borri 231 Varese 21100 IT email: alessandro.zann...@bticino.it WebSite: www.bticino.it<http://www.bticino.it> <http://www.bticino.it>[1491549876074_OutlookEmoji-1485765781489_logo_bticino.resized.png] [X] ________________________________ Please consider your environmental responsibility before printing this Email ________________________________ ________________________________ Da: Martyn Taylor [via ActiveMQ] <ml-node+s2283324n4724831...@n4.nabble.com> Inviato: martedì 11 aprile 2017 12.40 A: Alessandro ZANNINI Oggetto: Re: Apache Artemis - Stress-test time Clebert: Yes we could optimize on this area of the code to avoid the bindings query. To determine whether or not this is the root cause of the problem experience by Francesco and Alessandro, we just need to follow the same test without using retained messages. Francesco, Alessandro is this something you could test for us? Could you also let us know if staggering the subscribe helps. Like try testing connecting 100 clients at a time, wait a while then attach another 100. Once you have all your clients connected does the system perform as normal? (this will help us determine whether or not the bottleneck is the subscribe or just normal function with that many consumers). Another quick q, are your subscriptions matching most messages. e.g. are you using "#" or similar. If using "#" or subscriptions that match most messages I'd expect the performance to drop, since the broker needs to iterate through every subscription queue. If you have 20,000 subscription queues matching every message you might see perf decrease. Any more information on your use case would be helpful in diagnosing the bottleneck Thanks On Mon, Apr 10, 2017 at 5:33 PM, Clebert Suconic <[hidden email]</user/SendEmail.jtp?type=node&node=4724831&i=0>> wrote: > only thing I see on the thread dump is reained message is doing a > query on the queue every time: > > - org.apache.activemq.artemis.api.core.SimpleString.split(char) > @bci=100, line=314 (Compiled frame) > > - org.apache.activemq.artemis.core.postoffice.impl. > AddressImpl.<init>(org.apache.activemq.artemis.api.core.SimpleString, > org.apache.activemq.artemis.core.config.WildcardConfiguration) > @bci=31, line=48 (Compiled frame) > > - org.apache.activemq.artemis.core.postoffice.impl.SimpleAddressManager. > getMatchingBindings(org.apache.activemq.artemis.api.core.SimpleString) > @bci=77, line=121 (Compiled frame) > > - org.apache.activemq.artemis.core.postoffice.impl.PostOfficeImpl. > getMatchingBindings(org.apache.activemq.artemis.api.core.SimpleString) > @bci=5, line=656 (Compiled frame) > > - org.apache.activemq.artemis.core.server.impl.ActiveMQServerImpl. > bindingQuery(org.apache.activemq.artemis.api.core.SimpleString) > @bci=110, line=722 (Compiled frame) > > - org.apache.activemq.artemis.core.server.impl.ServerSessionImpl. > executeBindingQuery(org.apache.activemq.artemis.api.core.SimpleString) > @bci=9, line=730 (Compiled frame) > > - org.apache.activemq.artemis.core.protocol.mqtt. > MQTTRetainMessageManager.addRetainedMessagesToQueue( > org.apache.activemq.artemis.core.server.Queue, > java.lang.String) @bci=27, line=74 (Compiled frame) > > - > > > @Mtaylor: any way to avoid it? > > On Mon, Apr 10, 2017 at 11:42 AM, [hidden > email]</user/SendEmail.jtp?type=node&node=4724831&i=1> > <[hidden email]</user/SendEmail.jtp?type=node&node=4724831&i=2>> wrote: > > Here attached the output of "jstack -F" command. > > jstack.zip <http://activemq.2283324.n4.nabble.com/file/n4724787/ > jstack.zip> > > > > > > > > -- > > View this message in context: http://activemq.2283324.n4. > nabble.com/Apache-Artemis-Stress-test-time-tp4723999p4724787.html > > Sent from the ActiveMQ - User mailing list archive at Nabble.com. > > > > -- > Clebert Suconic > ________________________________ If you reply to this email, your message will be added to the discussion below: http://activemq.2283324.n4.nabble.com/Apache-Artemis-Stress-test-time-tp4723999p4724831.html To unsubscribe from Apache Artemis - Stress-test time, click here<http://activemq.2283324.n4.nabble.com/template/NamlServlet.jtp?macro=unsubscribe_by_code&node=4723999&code=YWxlc3NhbmRyby56YW5uaW5pQGJ0aWNpbm8uaXR8NDcyMzk5OXw5Mzc4MzU5Nzg=>. 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