All, First post, so apolgies if this is a repeated topic, i have checked the archives without much luck so here's hoping its new. I am experimenting using the JBossMQ implementation for a new project and am having some serious performance problems. Our system will be receiving (bytes) messages on multiple queues (MQSeries queues infact) and we will have a de-queuing engine that persists these messages to an oracle database before repackaging them as object messages on a topic. I don't believe this framework is anything unusual. Our problem is volume, we are expecting to receive near 500000 messages from various MQ-Series queues a day, which will be picked up and placed onto the JBossMQ Topic, so i have written a series of utilities to test how well the application service can cope with such volumes. Posting 10000 bytes messages to a JBossMQ Q has typically taken in the region of 1 minute, our engine can persist these and post them onto a topic at a rate of around 1000 / minute which is acceptable. However once we add subscribers to the topic we find that for performance drops by around 50%. Posting the original 10000 messages takes no longer, but the throughput for posting to the topic and subsequently reading from the topic is now greatly reduced. FYI, both the engine and the subscriber are using a messagelistener to "poll" for new messages... I have noticed the queue / topic dat files in the /db/jmsmq directory grow rapidly and that the persistence is all file based, which is where i think the depreciation of speed lies. Am i right in assuming the queues and topics write messages to the file and then requests for these messages trawl the files for outstanding messages? I know it is possible to point commercial JMS-MQ implementations at a database to use instead of a file-based persistence which i assume would improve speed greatly. Can this be done with JBoss at present? Am i missing something glaringly obvious? I really want to prove open-source is the way forward for the app-server in this project so comments, help, support are encouraged :) Regards Geoff -- This e-mail may contain confidential and/or privileged information. If you are not the intended recipient (or have received this e-mail in error) please notify the sender immediately and destroy this e-mail. Any unauthorised copying, disclosure or distribution of the material in this e-mail is strictly forbidden. _______________________________________________ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user
