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ActiveMQ - User

slow KahaDB access

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	slow KahaDB access by Matthew Hixson :: Rate this Message: Reply to Author \| View Threaded \| Show Only this Message I see these messages scroll up the console: INFO \| Slow KahaDB access: cleanup took 1998 I found this http://issues.apache.org/activemq/browse/AMQ-2404 but was wondering if this indicates underpowered hardware for ActiveMQ to be running on. This is one of our test servers with no load whatsoever on it right now. Is real load going to be a problem? Thanks, -M@
	Re: slow KahaDB access by Fredrik Jonson-3 :: Rate this Message: Reply to Author \| View Threaded \| Show Only this Message Matthew Hixson wrote: > I see these messages: "Slow KahaDB access: cleanup took 1998" I've also seen those messages. It is nice to get a hint about possible performance issues. Now it be even better if someone could offer a ballpark figure when to worry, and what to do about it. -- Fredrik Jonson
	Re: slow KahaDB access by KimSchneider :: Rate this Message: Reply to Author \| View Threaded \| Show Only this Message We get the same messages on two different ubuntu servers. There is no load on the servers and no producers connected to activemq but cleanups take from 500 to 2000. This doesn't happen on my developer pc (windows) and I wonder why?! Anyone's got a solution for this? Matthew Hixson wrote: I see these messages scroll up the console: INFO \| Slow KahaDB access: cleanup took 1998
	Re: slow KahaDB access by Gary Tully :: Rate this Message: Reply to Author \| View Threaded \| Show Only this Message the difference is in fsync behavior of the two systems. Some drive/OS combinations do not actually go to the disk, others do. There is a little utility in kahaDB from 5.3 that will demonstrate the raw disk performance w.r.t fsync and you can compare the two systems. java -classpath lib/kahadb-5.3.0.jar org.apache.kahadb.util.DiskBenchmark by default it writes to a file in the current directory and spits out results you can compare. 2009/11/5 KimSchneider <kim.schneider@...>: > > We get the same messages on two different ubuntu servers. There is no load on > the servers and no producers connected to activemq but cleanups take from > 500 to 2000. > > This doesn't happen on my developer pc (windows) and I wonder why?! > > Anyone's got a solution for this? > > > > Matthew Hixson wrote: >> >> I see these messages scroll up the console: >> >> INFO \| Slow KahaDB access: cleanup took 1998 >> > > -- > View this message in context: http://old.nabble.com/slow-KahaDB-access-tp26172918p26213644.html > Sent from the ActiveMQ - User mailing list archive at Nabble.com. > > -- http://blog.garytully.com Open Source Integration http://fusesource.com