An Introduction to Top Ten System Utilities of your IBMi Software

Posted by Abel Willium on November 9th, 2021

IBMi can handle many tasks automatically, whereas another OS requires a team to handle similar tasks. IBM iSeries AS400 always emphasis on security, software management, and problem-solving approach. Get an introduction to system architecture and built-in functions through this blog.


Have a look at ten IBM AS/400 iSeries utilities that can give you a boost in system administration:

History Log

Since starting, if the system has been shipped with the value QHSTLOGSIZ set to 5000, it means the number of records allowed in a single QHST log file before moving to another one.

Previously there happens to be very little activity onto the system, so 5000 was the best limit. But in today’s scenario, we’ve thousands of users using our system and data in multiple ways. Moreover, it’s a fact that more and more information is being uploaded on the IBM as400 iSeries system, which denotes the formation of a new QHST file every minute.

Message Queues

IBM as400 i-Series is excellent at logging events, and that mostly goes to the history log or message queue. But you should be aware that the message queue is capable of holding only 75,000 messages. In the absence of proper maintenance services, more messages in the queue can result in the process stopping.

System value QJOBMSGQFL allows users to dictate at the system level and decide what will appear on the screen when a queue is full. The system value is denoted through – *NOWRAP command, which means “do not wrap.”

If you rely heavily on the QSYSOPR command, keep in mind that this queue is clear at IPL time and can wipe your entire audit trail.
CRTMSGQ MSGQ (QSYS/QSYSMSG) – This command can be used to create a message queue.

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Abel Willium

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Abel Willium
Joined: February 25th, 2021
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