[IMPALA-652] Excessive memory consumption when query tables with 1k columns (Parquet file)

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: Impala 1.1.1
• Fix Version/s: Impala 1.2.1
• Assignee: Skye Wanderman-Milne
• Reporter: Alan Choi
• Created: 04/Nov/13 23:33
• Updated: 19/Nov/13 01:09
• Resolved: 19/Nov/13 01:09

Description

The table has 1k string columns. Each column has ~40 char. It has 1 row. When querying this table, Impala consumes more than 12.5GB of mem (and then failed due mem-limit).