On 1/12/07, Tony Qian <[EMAIL PROTECTED]> wrote:
All, New to ActiveMQ. First I apologize for long email. I'm evaluating an open source JMS server for a project. I looked several JMS servers and found that ActiveMQ is perfect for our project. I started to play around with ActiveMQ 4.1.0 version. I got a couples of questions. I looked through the forum and mailing list. I still didn't get answer. 1) what is exact purpose of journal?
Performance
It seems to me journal and database serve same purpose, persistence. is journal faster than database?
Yes
2) I used example packaged inside download (producer and consumer) and made it durable. I also configured it to use both journal and database(Mysql). if I started producer and consumer at same time, everything works perfectly. If I first produced 4000 messages (consumer was not started yet), I saw some messages went to journal and some to database. That is perfectly fine. Surprisingly, the latest messages (from message 1200 to 4000) went to database! After I started consumer, consumer was consuming messages starting from message 1. Shortly after less than a couple of hundred messages, I got attached exception. Along with the exception, my PC CPU usage was 100%
I don't really understand that exception - its normally thrown when a server is trying to open a port which is already open. For some reason your MySQL install is rejecting a new connection being created - I'm not sure why. Maybe you need to increase the maximum allowed connections or something? -- James ------- http://radio.weblogs.com/0112098/
