[jira] [Assigned] (HIVE-17295) Make MemoryManagerImpl.ROWS_BETWEEN_CHECKS configurable

["Eugene Koifman (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-17295?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Eugene Koifman reassigned HIVE-17295:
-------------------------------------


> Make MemoryManagerImpl.ROWS_BETWEEN_CHECKS configurable
> -------------------------------------------------------
>
>                 Key: HIVE-17295
>                 URL: https://issues.apache.org/jira/browse/HIVE-17295
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Eugene Koifman
>            Assignee: Eugene Koifman
>
> currently addedRow() looks like
> {noformat}
> public void addedRow(int rows) throws IOException {
>     rowsAddedSinceCheck += rows;
>     if (rowsAddedSinceCheck >= ROWS_BETWEEN_CHECKS) {
>       notifyWriters();
>     }
>   }
> {noformat}
> it would be convenient for testing to set ROWS_BETWEEN_CHECKS to a low value so that we can generate multiple stripes with very little data.
> Currently the only way to do this is to create a new MemoryManager that overrides this method and install it via OrcFile.WriterOptions but this only works when you have control over creating the Writer.
> There is no way to do this via some set of config params to make Hive query for example, create multiple stripes with little data.



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