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Look out for large LQS files

It’s good to see my ex-colleague Guatam putting out some MSMQ content after a 10 month hiatus.

MSMQ Performance degrades over time & MSMQ LQS folder is 100s of MB.

The files in the %windir%\system32\msmq\storage\lqs folder are configuration files for the machine’s queues, or cached configuration information in the case of public queues.

Inside these text files is a collection of parameters, such as “Label”, “QueueName” and “PrivLevel”. The largest value is the “Security” parameter which contains the access permissions on the queue.

Guatam reports that sometimes this value can get out of hand, leading to larger and larger configuration files that are too big to be easily read.

One workaround is to delete and recreate the affected queues. Also disable inheritance and apply security permissions directly.


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