Tim Armstrong has posted comments on this change. Change subject: PREVIEW: Basic column-wise slot materialization in Parquet scanner. ......................................................................
Patch Set 1: (1 comment) http://gerrit.cloudera.org:8080/#/c/2779/1/be/src/exec/hdfs-parquet-scanner.cc File be/src/exec/hdfs-parquet-scanner.cc: Line 1740: scratch_batch->pool->Clear(); Are you seeing the MemPool show up in the profile? The current allocation algorithm starts with small chunks each time with this usage pattern. It wouldn't be hard to change the MemPool to avoid this if there is a use case for it. -- To view, visit http://gerrit.cloudera.org:8080/2779 To unsubscribe, visit http://gerrit.cloudera.org:8080/settings Gerrit-MessageType: comment Gerrit-Change-Id: I72a613fa805c542e39df20588fb25c57b5f139aa Gerrit-PatchSet: 1 Gerrit-Project: Impala Gerrit-Branch: cdh5-trunk Gerrit-Owner: Alex Behm <[email protected]> Gerrit-Reviewer: Alex Behm <[email protected]> Gerrit-Reviewer: Tim Armstrong <[email protected]> Gerrit-HasComments: Yes
