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https://issues.apache.org/jira/browse/DERBY-1677?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dag H. Wanvik updated DERBY-1677:
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Derby Categories: [Performance]
> Investigate increasing the memory limit that is used to calculate the
> sortbuffer size for sorting.
> --------------------------------------------------------------------------------------------------
>
> Key: DERBY-1677
> URL: https://issues.apache.org/jira/browse/DERBY-1677
> Project: Derby
> Issue Type: Improvement
> Components: Store
> Affects Versions: 10.0.2.0, 10.0.2.1, 10.1.1.0, 10.1.2.1, 10.1.3.1,
> 10.2.1.6
> Reporter: Sunitha Kambhampati
>
> The sortbuffer is the in memory sort buffer and the size of the sort buffer
> is calculated using the default memory limit of 1M if
> derby.storage.sortBufferMax is not specified. .
> This may not be appropriate for large systems. Investigate if we can up this
> value.
> see org.apache.derby.impl.store.access.sort.ExternalSortFactory
> protected static final int DEFAULT_MEM_USE = 1024*1024; // aim for about 1Meg
> The calculations to come up with the initial size for sortbuffer is in
> ExternalSortFactory.createSort()
>
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