adabas 3.3.3.01 Message Queues

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1

I have been trying to find out how ADABAS creates/removes message queues in HP-UX/ia64 11.23.

We use Applinx with about 500 users and when Applinx disconnects after a timeout, it leaves the message queue(s) for the user and they access 4 databases during a session.

  1. The user id is changed to ######## and remains in the user queue so a 3009 can be issued if necessary. We wrote a program to clean these up every 2 hours.
  2. Message queue entries change from …ada… to …ad0… and I do not know how to identify these.

Out message queues are set to 65,000 max, but with a policy of only re-booting once a month, this could exhaust the message queue resource.

any help is appreciated

2

There are two different things:

  1. The user queue elements are removed by Adabas if you use the OPEN_REQUIRED option. Then Adabas can remove the user queue elements after the non activity timeout, because this option takes care that the user gets the required response code 9 - only the reason is different: Open required instead of time limit exceeded.
  2. A cleanup of the message queues is done only if all message queues reserved for Adabas are in use (number of message queues = value of NU parameter in v3.3, value of NCL parameter in v5.1). This means that it is normal that the number of message queues increases - as soon as the maximum number of message queues is exceeded, it is reduced again.

Regards,
Wolfgang

3

Wolfgang,

Thanks.

Many installations have written programs to do ‘op’ across databases in order not to get ‘no open’ reasons when Open_required is set.

Thank you for the response.

Mike Waldron