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From drvillo <f.viv...@gmail.com>
Subject Re: performance degradation
Date Fri, 12 Jan 2007 13:52:10 GMT

Hi James
I've just ended some testing with mysql.
Throughput has moved from 30 msg/sec to almost 300 (niice),
but I've started to see the following messages:

[.0.1:58512] INFO  org.apache.activemq.broker.region.PrefetchSubscription -
Could not correlate acknowledgment with dispatched message: MessageAck
{commandId = 300079, responseRequired = false, ackType = 2, consumerId =
ID:villomac.local-58504-1168608802249-3:1:-1:2, firstMessageId =
ID:villomac.local-58504-1168608802249-3:4:10388:1:1, lastMessageId =
ID:villomac.local-58504-1168608802249-3:4:10388:1:1, destination =
queue://queue2, transactionId =
TX:ID:villomac.local-58504-1168608802249-3:1:99999, messageCount = 1}


The setup is the same, with the only difference of the datasource...
does it make any sense? Or should I just ignore them?

FYI, I'm using DUPS_OK_ACKNOWLEDGE.

Anyway thanks, now I'll test it with hsqldb.
Cheers
Francesco

James.Strachan wrote:
> 
> On 1/12/07, drvillo <f.vivoli@gmail.com> wrote:
>>
>> HI James
>>
>> no I haven't tried, since my specs require to have all embedded, but if
>> it's
>> for isolating the problem I can try.
>> Do you think hsqldb would do better?
> 
> I don't think so but by all means try it if you like. I've never
> really considered hsqldb as a 'real' database for massive amounts of
> data ;) I figured folks just used it for testing.
> 
> If nothing else, trying mysql / postgresql or some other external
> database (preferably on the same box) and it would at least narrow
> down the problem. I've heard reports of Derby hogging RAM and slowing
> down with large databases.
> 
> -- 
> 
> James
> -------
> http://radio.weblogs.com/0112098/
> 
> 

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