[jira] [Resolved] (AMQ-5969) Add a configurable threshold property for disk limit change

["Christopher L. Shannon (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/AMQ-5969?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Christopher L. Shannon resolved AMQ-5969.
-----------------------------------------
    Resolution: Fixed

The diskUsageCheckRegrowThreshold property can be used to configure this.  By default it is -1 and turned off.  Setting this property to 0 or greater will enable it.

{code:xml}
<!-- Check disk limits every minute and grow the store size up to a maximum of 50% of the partition.  Only increase if the amount of free space has increased by 10 mb or more -->
<broker xmlns="http://activemq.apache.org/schema/core" schedulePeriodForDiskUsageCheck="60000"  diskUsageCheckRegrowThreshold="10 mb">
  ...

<systemUsage>
  <systemUsage>
    <storeUsage>
     <!-- Use up to 50% of the partition size -->
      <storeUsage percentLimit="50" />
    </storeUsage>
  </systemUsage>
</systemUsage>

---
</broker>
{code}

> Add a configurable threshold property for disk limit change
> -----------------------------------------------------------
>
>                 Key: AMQ-5969
>                 URL: https://issues.apache.org/jira/browse/AMQ-5969
>             Project: ActiveMQ
>          Issue Type: Sub-task
>    Affects Versions: 5.12.0
>            Reporter: Christopher L. Shannon
>            Assignee: Christopher L. Shannon
>            Priority: Minor
>             Fix For: 5.13.0
>
>
> There should be a configurable offset/threshold value set to prevent the disk limits from growing to often when only minor changes happen to the disk size.  A good default value is probably something like 1 megabyte, but could be configured higher or lower.  
> This would mean that the store limit value would only increase when the available space changes by at least the offset value.
> This only applies to growing the store (when using the percent option) because we always want to shrink the store limit if it's too large even if by 1 byte to make sure the configured limit is never higher than the available space.



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