[
https://issues.apache.org/jira/browse/DRILL-6310?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16518641#comment-16518641
]
ASF GitHub Bot commented on DRILL-6310:
---------------------------------------
Ben-Zvi commented on a change in pull request #1324: DRILL-6310: limit batch
size for hash aggregate
URL: https://github.com/apache/drill/pull/1324#discussion_r196946482
##########
File path:
exec/java-exec/src/main/java/org/apache/drill/exec/physical/impl/aggregate/HashAggTemplate.java
##########
@@ -1317,7 +1364,7 @@ private void checkGroupAndAggrValues(int incomingRowIdx)
{
useReservedValuesMemory(); // try to preempt an OOM by using the
reserve
- addBatchHolder(currentPartition); // allocate a new (internal) values
batch
+ addBatchHolder(currentPartition, getBatchSize()); // allocate a new
(internal) values batch
Review comment:
Again confusion between **size** and **count** -- The new BatchHolder is
allocated based on a **count** of rows, this count is computed (based on sizing
the incoming) such that the result batch size would not exceed the given (e.g.
16MB).
Now worst case, the following incoming (or a size deviation within the
averaged rows) yields bigger values (e.g. longer varchars) -- Looks like the
current code would continue to fill the previous batch based on the original
**count**. Maybe a check can be added so in this case fewer rows would be
inserted into the batch (i.e., less than the original count), such that the
**size** restriction would be kept.
Hopefully such a check would be cheap ....
----------------------------------------------------------------
This is an automated message from the Apache Git Service.
To respond to the message, please log on GitHub and use the
URL above to go to the specific comment.
For queries about this service, please contact Infrastructure at:
[email protected]
> limit batch size for hash aggregate
> -----------------------------------
>
> Key: DRILL-6310
> URL: https://issues.apache.org/jira/browse/DRILL-6310
> Project: Apache Drill
> Issue Type: Improvement
> Components: Execution - Flow
> Affects Versions: 1.13.0
> Reporter: Padma Penumarthy
> Assignee: Padma Penumarthy
> Priority: Major
> Fix For: 1.14.0
>
>
> limit batch size for hash aggregate based on memory.
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
