Archive for the Category: IBM i (OS/400)

MQ Message Encryption Critical Bug Fixed

November 15, 2019 Roger Lacroix

Recently, a customer reported a bug in MQ Message Encryption (MQME) for certain types of JMS messages (aka MQRFH2) where the MCA (amqrmppa) process would crash. After some investigation, a buffer overrun condition was discovered that would cause the MCA (amqrmppa) process to crash. The bug has been fixed. Please contact support@capitalware.com for the latest […]

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IBM MQ Fix Pack 9.0.0.8 Released

October 28, 2019 Roger Lacroix

IBM has just released Fix Pack 9.0.0.8 for IBM MQ V9.0 LTS https://www.ibm.com/support/pages/node/1089052?myns=swgws&mynp=OCSSYHRD Regards, Roger Lacroix Capitalware Inc.

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SQLite v3.30.0 Released

October 7, 2019 Roger Lacroix

D. Richard Hipp has just released SQLite v3.30.0. http://www.sqlite.org/news.html SQLite is a software library that implements a self-contained, serverless, zero-configuration, transactional SQL database engine. SQLite is the most widely deployed SQL database engine in the world. The source code for SQLite is in the public domain. Regards, Roger Lacroix Capitalware Inc.

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2 New IBM MQ RFEs related to com.ibm.mq.jmqi.defaultMaxMsgSize

September 20, 2019 Roger Lacroix

Please review and vote for these RFEs if you think they are a good idea. The links below will take you directly to the RFE. RFE #1: Document com.ibm.mq.jmqi.defaultMaxMsgSize JVM environment variable URL to review the RFE and Vote for it if you like: http://www.ibm.com/developerworks/rfe/execute?use_case=viewRfe&CR_ID=136680 RFE #2: Add & Document com.ibm.mq.jmqi.defaultMaxMsgSize for .NET Framework URL […]

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IBM MQ Fix Pack 8.0.0.13 Released

September 19, 2019 Roger Lacroix

IBM has just released Fix Pack 8.0.0.13 for IBM MQ https://www.ibm.com/support/pages/fix-pack-80013-websphere-mq-v8 Regards, Roger Lacroix Capitalware Inc.

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JMS and Java Client Mode Performance Issues for MQ Get API Calls

August 15, 2019 Roger Lacroix

I’ve wasted far, far too much of my time inspecting what is going on with the auto-resizing of the get buffer for the internal JMQI and MQI components for MQ classes for JMS, MQ classes for Java and MQ classes for .NET. A strange entry in one of the MQ Auditor audit files got my […]

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Pub/Sub Java/JMS MQ MQGet API Issue

August 9, 2019 Roger Lacroix

Not surprisingly, when I tested: Subscribing to a topic with JMS Subscribing to a topic with Java (non-JMS) They both showed that the internal JMQI routine was starting with a MQGet buffer size of 4KB and auto-adjusting the size of the buffer as needed (all behind the scenes). Hence, when I used MQ Auditor, I […]

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How to Improve Your Java/JMS MQ Tuning Cred.

August 8, 2019 Roger Lacroix

Here’s my version of a cheap Info-Commercial: Do you want to impress your colleagues? Do you want to impress your boss, so that you can receive a big fat bonus? Call today and we’ll show you how to impress the MQAdmins in your company! And if you call within the next 5 minutes, we’ll even […]

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Tuning Java Programs for Optimum MQ Get API Calls Performance

August 6, 2019 Roger Lacroix

You should really read this blog posting first. The results of some of the test scenarios below, simply do not make any sense. I would like to think there is some sort of logic behind it but it is probably lack of testing by IBM that introduced some bugs in the code or should I […]

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Tuning JMS Programs for Optimum MQ Get API Calls Performance

August 2, 2019 Roger Lacroix

On Wednesday, I decided to do some testing of some simple (1) MQ for JMS, (2) MQ for Java and (3) procedure language (i.e. amqsbcg) programs to show that using the JVM environment variable of com.ibm.mq.jmqi.defaultMaxMsgSize with an appropriate size could make a JMS application 10 to 15% faster because there would not be any […]

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