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From "Davis, Dorothea" <Dorothea_Da...@homedepot.com>
Subject RE: [jira] Resolved: (AMQ-2837) Slow KahaDB
Date Tue, 20 Jul 2010 17:46:26 GMT
In the link it has the following statement... but how do I check my disk speed and how do I
determine what exactly to set the "time="  to?  What's the actual formula?

       " You can configure a threshold used to log the message by using

          -Dorg.apache.activemq.store.kahadb.LOG_SLOW_ACCESS_TIME=1500

               system property and adjust it to your disk speed. "

Thanks for your help!

Dorothea Davis
The Home Depot
(w) (770) 433-8211 x17476
(c)  (404) 314-0352
dorothea_davis@homedepot.com

-----Original Message-----
From: Rob Davies (JIRA) [mailto:jira@apache.org]
Sent: Monday, July 19, 2010 8:15 PM
To: dev@activemq.apache.org
Subject: [jira] Resolved: (AMQ-2837) Slow KahaDB


     [ https://issues.apache.org/activemq/browse/AMQ-2837?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Rob Davies resolved AMQ-2837.
-----------------------------

      Assignee: Rob Davies
    Resolution: Working as Designed

> Slow KahaDB
> -----------
>
>                 Key: AMQ-2837
>                 URL: https://issues.apache.org/activemq/browse/AMQ-2837
>             Project: ActiveMQ
>          Issue Type: Bug
>          Components: Broker
>    Affects Versions: 5.3.2
>         Environment: Linux
>            Reporter: Andy
>            Assignee: Rob Davies
>
> I'm using KahaDB for persistence with the following configuration:
> <?xml version="1.0" encoding="UTF-8"?>
> <beans>
>   <broker brokerName="test-broker"
>         persistent="true"
>         useJmx="true"
>         useShutdownHook="false"
>         deleteAllMessagesOnStartup="false"
>         xmlns="http://activemq.apache.org/schema/core">
>     <persistenceAdapter>
>       <kahaDB directory="activemq-data" journalMaxFileLength="32mb" indexCacheSize="10000000
> "/>
>     </persistenceAdapter>
>     <transportConnectors>
>       <transportConnector uri="tcp://localhost:61616"/>
>     </transportConnectors>
>     <destinationPolicy>
>       <policyMap>
>       <policyEntries>
>         <policyEntry topic=">">
>           <subscriptionRecoveryPolicy>
>             <timedSubscriptionRecoveryPolicy recoverDuration="3600000"/>
>           </subscriptionRecoveryPolicy>
>         </policyEntry>
>       </policyEntries>
>       </policyMap>
>     </destinationPolicy>
> </broker>
> </beans>
> I've some durable consumers. The broker is showing many "Slow KahaDB access" log entries.
> Any suggestions?
>  INFO | Slow KahaDB access: Journal append took: 0 ms, Index update took 1248 ms
>  INFO | Slow KahaDB access: Journal append took: 0 ms, Index update took 1560 ms
>  INFO | Slow KahaDB access: Journal append took: 1 ms, Index update took 1227 ms
>  INFO | Slow KahaDB access: Journal append took: 0 ms, Index update took 1227 ms
>  INFO | Slow KahaDB access: Journal append took: 1480 ms, Index update took 0 ms
>  INFO | Slow KahaDB access: Journal append took: 5 ms, Index update took 1302 ms
>  INFO | Slow KahaDB access: Journal append took: 0 ms, Index update took 1302 ms
>  INFO | Slow KahaDB access: Journal append took: 13 ms, Index update took 1348 ms
>  INFO | Slow KahaDB access: Journal append took: 0 ms, Index update took 1590 ms
>  INFO | Slow KahaDB access: Journal append took: 1327 ms, Index update took 0 ms
>  INFO | Slow KahaDB access: Journal append took: 0 ms, Index update took 1263 ms
>  INFO | Slow KahaDB access: Journal append took: 1 ms, Index update took 1276 ms
>  INFO | Slow KahaDB access: Journal append took: 0 ms, Index update took 1277 ms
>  INFO | Slow KahaDB access: Journal append took: 0 ms, Index update took 1318 ms
>  INFO | Slow KahaDB access: Journal append took: 0 ms, Index update took 1312 ms
>  INFO | Slow KahaDB access: Journal append took: 0 ms, Index update took 1593 ms
>  INFO | Slow KahaDB access: Journal append took: 3 ms, Index update took 1608 ms
>  INFO | Slow KahaDB access: Journal append took: 0 ms, Index update took 1302 ms
>  INFO | Slow KahaDB access: Journal append took: 3 ms, Index update took 1317 ms
>  INFO | Slow KahaDB access: Journal append took: 0 ms, Index update took 1318 ms
>  INFO | Slow KahaDB access: Journal append took: 2 ms, Index update took 1316 ms
>  INFO | Slow KahaDB access: Journal append took: 1318 ms, Index update took 1 ms
>  INFO | Slow KahaDB access: Journal append took: 0 ms, Index update took 1296 ms

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