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Author Message
Topic:MQ migration - recreate with linear logging
Andyh

Replies: 8
Views: 5100

PostForum:General IBM MQ Support Posted: Sun Mar 08, 2020 9:44 am Subject: MQ migration - recreate with linear logging
Migrating from V6 to V9.1 is a big step and the circular->linear conversion is unlikely to be your main concern.

MQ 9.0.4 and beyond support the migmqlog command which allows a circular logging ...
Topic:RDQM data replication question
Andyh

Replies: 10
Views: 8128

PostForum:IBM MQ Installation/Configuration Support Posted: Tue Jan 07, 2020 5:33 am Subject: RDQM data replication question
NPMCLASS(HIGH) only has ANY effect if the QMgr is successfully shutdown in a controlled manner.
Even when non-persistent messages spill from in memory buffers to disk they are not chained in to the m ...
Topic:multi-instance QM: system invoked failover takes longer
Andyh

Replies: 1
Views: 3853

PostForum:General IBM MQ Support Posted: Tue Jan 07, 2020 12:28 am Subject: multi-instance QM: system invoked failover takes longer
A controlled failover will explicitly drop the file locks used by the active QMgr, while the abrupt termination of the server hosting the QMgr (or breaking the network links to the NFS server) will de ...
Topic:Reasons for damaged objects?
Andyh

Replies: 10
Views: 7352

PostForum:General Discussion Posted: Tue Dec 17, 2019 3:23 am Subject: Reasons for damaged objects?
Sorry to disagree, but from my perspective NONE of those are acceptable reasons for a damaged MQ object. If MQ were to report a damaged object under those conditions (assuming the underlying filesyste ...
Topic:Reasons for damaged objects?
Andyh

Replies: 10
Views: 7352

PostForum:General Discussion Posted: Mon Dec 16, 2019 4:12 am Subject: Reasons for damaged objects?
"There also used to be some tech note that said in extreme circumstances while using syncpoint there was a slight chance of corrupting an object (queue). "

It's possible that such a tech ...
Topic:Long running transactions
Andyh

Replies: 11
Views: 6039

PostForum:General IBM MQ Support Posted: Mon Nov 18, 2019 9:21 am Subject: Long running transactions
The queue manager should have dealt with the long running transaction (either backed out, or rolled forwards (if indoubt)) BEFORE the logs actually became full. If the logs did really fill to capacity ...
Topic:Logging Put/Get Message
Andyh

Replies: 19
Views: 13381

PostForum:IBM MQ Performance Monitoring Posted: Wed Oct 23, 2019 11:49 pm Subject: Logging Put/Get Message
Your initial post gives an idea of what you're trying to do, but not why you're trying to do it.
In MQ V9.1 there's typically very little additional admin or performance overhead in using linear logg ...
Topic:Queue Statistics PUT & GET Count doesn't match
Andyh

Replies: 28
Views: 9572

PostForum:General IBM MQ Support Posted: Mon Sep 23, 2019 12:25 pm Subject: Queue Statistics PUT & GET Count doesn't match
In the case of a delete ql(...) purge then the "purge" is really just permission to delete the queue even if it's hosting messages. I don't believe this would make any change to the purge (a ...
Topic:Queue Statistics PUT & GET Count doesn't match
Andyh

Replies: 28
Views: 9572

PostForum:General IBM MQ Support Posted: Sun Sep 22, 2019 10:06 am Subject: Queue Statistics PUT & GET Count doesn't match
I'm not sure I understand the question, maybe I'm showing my lack of knowledge where MQExplorer is concerned ?

Removing messages from a queue using MQGET is not equivalent to issuing a runmqsc CLE ...
Topic:Queue Statistics PUT & GET Count doesn't match
Andyh

Replies: 28
Views: 9572

PostForum:General IBM MQ Support Posted: Sat Sep 21, 2019 1:57 pm Subject: Queue Statistics PUT & GET Count doesn't match
No, MQCO_DELETE_PURGE relates to closing a dynamic queue, and will only update the appropriate MQCLOSE statistics.

By "purge" I'm referring to the CLEAR QL command.
Topic:Queue Statistics PUT & GET Count doesn't match
Andyh

Replies: 28
Views: 9572

PostForum:General IBM MQ Support Posted: Sat Sep 21, 2019 8:54 am Subject: Queue Statistics PUT & GET Count doesn't match
Purged or expired messages are neither successful nor failed MQGET's and wouldn't update either MQGET counter.
Imagine you were to purge a queue, then put a message with a short expiry time, and to i ...
Topic:Queue Statistics PUT & GET Count doesn't match
Andyh

Replies: 28
Views: 9572

PostForum:General IBM MQ Support Posted: Fri Sep 20, 2019 2:46 am Subject: Queue Statistics PUT & GET Count doesn't match
Q. Are read and backed out messages successful destructive get requests?
A. Yes, the destructive get operation succeeded
Topic:Clear message and amqrmppa application
Andyh

Replies: 37
Views: 13152

PostForum:General IBM MQ Support Posted: Sun Sep 15, 2019 10:06 pm Subject: Clear message and amqrmppa application
It wasn't 100% clear to me from the initial post whether the amqrmppa was acting on behalf of a message channel, or a client channel.
Assuming the former, a receiver channel will keep a cache of que ...
Topic:Queue Statistics PUT & GET Count doesn't match
Andyh

Replies: 28
Views: 9572

PostForum:General IBM MQ Support Posted: Sun Sep 15, 2019 9:58 pm Subject: Queue Statistics PUT & GET Count doesn't match
The most obvious reason for this mismatch would seem to be that the queue wasn't empty at the start of the stats interval.
amqsrua might give you some additional insight here, that program reports on ...
Topic:process amqzlaa0 died / RC=2009 / IPC connection /MQ 8.0.0.9
Andyh

Replies: 1
Views: 1618

PostForum:General IBM MQ Support Posted: Thu Jul 25, 2019 6:34 am Subject: process amqzlaa0 died / RC=2009 / IPC connection /MQ 8.0.0.9
The minimal information supplied here doesn't look obviously consistent in that threads within the amqzlaa0 process should almost always have an xihTHREAD context (except for a tiny amount of time dur ...
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