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From "Claus Ibsen (Commented) (JIRA)" <>
Subject [jira] [Commented] (AMQ-3573) Hardcoded defaults for systemUsage not suitable for out of the box
Date Thu, 03 Nov 2011 10:29:32 GMT


Claus Ibsen commented on AMQ-3573:

Isn't there an API in JDK6+ now that you can ask for disk space?

> Hardcoded defaults for systemUsage not suitable for out of the box 
> -------------------------------------------------------------------
>                 Key: AMQ-3573
>                 URL:
>             Project: ActiveMQ
>          Issue Type: Improvement
>          Components: Broker
>    Affects Versions: 5.5.1
>            Reporter: Torsten Mielke
>              Labels: default, systemUsage
>         Attachments: AMQ-3573.patch
> Right now the default activemq.xml has the entire <systemUsage> section commented
out. If commented, then the default systemUsage as defined in BrokerService.getSystemUsage()
applies and uses these limits:
> memoryLimit 64 MB
> storeLimit: 10 GB
> tempLimit: 100 GB
> I don't think these are good default values as in the worst case the broker may use 110
GB of disk space. Many runtime environments will not have that much disk space and are therefore
in danger of running out of disk space completely. 
> IMHO some more sensitive defaults would be 
> memoryLimit 64 MB
> storeLimit:  1 GB
> tempLimit:   1 GB
> to prevent the broker from using too much disk space by default. 
> I believe most users of ActiveMQ are unaware of these defaults and probably don't expect
the broker to use up to 110 GB of their disk. 
> If anyone really needs large store and temp limit, they should explicitly configure for

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