[ 
https://issues.apache.org/jira/browse/HIVE-17417?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Prasanth Jayachandran updated HIVE-17417:
-----------------------------------------
    Attachment: HIVE-17417.6.patch

> LazySimple Timestamp is very expensive
> --------------------------------------
>
>                 Key: HIVE-17417
>                 URL: https://issues.apache.org/jira/browse/HIVE-17417
>             Project: Hive
>          Issue Type: Bug
>          Components: Serializers/Deserializers
>    Affects Versions: 3.0.0, 2.4.0
>            Reporter: Prasanth Jayachandran
>            Assignee: Prasanth Jayachandran
>            Priority: Critical
>         Attachments: HIVE-17417.1.patch, HIVE-17417.2.patch, 
> HIVE-17417.3.patch, HIVE-17417.4.patch, HIVE-17417.5.patch, 
> HIVE-17417.6.patch, date-serialize.png, timestamp-serialize.png, 
> ts-jmh-perf.png
>
>
> In a specific case where a schema contains array<struct> with timestamp and 
> date fields (array size >10000). Any access to this column very very 
> expensive in terms of CPU as most of the time is serialization of timestamp 
> and date. Refer attached profiles. >70% time spent in serialization + 
> tostring conversions. 



--
This message was sent by Atlassian JIRA
(v6.4.14#64029)

Reply via email to