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From "Krishnadasan T S (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (AMQ-3736) Kaha DB Db.data file is growing
Date Sat, 03 Mar 2012 05:30:01 GMT

    [ https://issues.apache.org/jira/browse/AMQ-3736?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13221521#comment-13221521
] 

Krishnadasan T S commented on AMQ-3736:
---------------------------------------

Hi,

thanks for a quick reply

We are using fixed number of queues.  Is it applicable to topics also. In the case of topics
there is such a scenario like we are creating a topic for each login by appending login id
and a newly created session key. so this will be different for each login for a same client.
This is not queue but topic. Is this can create the above issue. One thing is that previous
topics created for a client will not be used again, so will it be automatically deleted from
the binary tree index or I need to explicitly delete it. How to delete topic, i could not
see api for delete in jms spec. 

Although now this system is not that large, we really want to scale number of clients. We
have a working system, which has nearly 30000 clients base perday, which uses proprietory
technologies like Tibco Rendezvous Messaging system,Oracle DB etc. Our goal of this application,
which uses open source technologies (activemq, mysql, jboss etc) is to replace that big system
with in a 1 year of target. So your support in solving such issues will be very helpful to
me.   
                
> Kaha DB Db.data file is growing
> -------------------------------
>
>                 Key: AMQ-3736
>                 URL: https://issues.apache.org/jira/browse/AMQ-3736
>             Project: ActiveMQ
>          Issue Type: Bug
>          Components: Broker
>    Affects Versions: 5.5.1
>         Environment: cent os 5.3, java 6 update 30
>            Reporter: Krishnadasan T S
>            Priority: Blocker
>         Attachments: activemq.xml
>
>
> In our production and development environment db.data file is growing. Within few weeks
it reaches GB's in size. When it grows larger broker hangs frequently. I have already reported
a bug in 5.4.2(AMQ-3710) url https://issues.apache.org/jira/browse/AMQ-3710.  In that case
db.data had a size of 5 GB. When we cleared kaha db related files db.data,db.redo and db-735.log
files, that issue solved.By further monitoring  We noticed that db.data file is growing by
day from MB to GB. And when the size become larger, the broker hanging issue is coming back.
 
>            Now we have updated Our activemq broker to 5.5.1. But db.data is still growing.
Every day we are monitoring it and if it is become big(200 mb) we are clearing all kaha related
files before our business start.
>   Other kaha related files are normal. db-*.log files are cleared by kaha db. db.redo
file is not growing. Only db-data file is growing.
>         I don't think this is a correct behavior. At certain point of time it should
clear unwanted data write. I am using the same configuration without much change. 
>  I have attached active mq config file with this.
>  

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