Re: Need ideas to reduce open/close in RPG program

On 14-Dec-2015 13:02 -0600, Mark Murphy/STAR BASE Consulting Inc. wrote:

<<SNIP>> Years ago I made a broker using a data queues to send data
to multiple systems. It was extremely fast, but if the data queue got
more than say 100 messages deep, it was 10 times slower. I think you
can regulate that by setting the initial size of the data queue, but
I never did any testing to verify my hypothesis.

If "years" goes back to pre-v3r1 or perhaps early v3r1, then since then, the horribly slowed queue issue was addressed and rectified. The /old/ implementation was *horrible*, whereby all of the enqueued data was getting _moved_ elsewhere whenever a new message was added and\or a message was removed\dequeued [I do not recall the specifics], then all of that moved data was getting _moved back_ /onto/ the queue.

I knew about the issue and the resolution, because the DBXREF is implemented using the same underlying LIC methods as user queues. The negative impact was so noticeable, that either the LIC queue feature needed to /correct/ the design to allow the [since changed from a single-queue to a dual-queue feature] to operate with sufficient throughput, or the DBXREF would have had to implement an alternative queue [and that probably would have been using a list of spaces, implemented entirely above the LIC except for ensuring atomicity].