[
https://issues.apache.org/jira/browse/ORC-961?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Quanlong Huang reassigned ORC-961:
----------------------------------
Assignee: ZhangXin (was: Quanlong Huang)
This is done by [~rex_xinzh].
ORC-1232 is filed for disabling these metrics.
> [C++] Expose metrics of the reader
> ----------------------------------
>
> Key: ORC-961
> URL: https://issues.apache.org/jira/browse/ORC-961
> Project: ORC
> Issue Type: New Feature
> Components: C++
> Reporter: Quanlong Huang
> Assignee: ZhangXin
> Priority: Major
> Fix For: 1.9.0
>
>
> It'd be useful for clients to collect metrics of the evaluation of the pushed
> down predicates. Currently SargsApplier keeps track of the selected RowGroups
> and evaluated RowGroups:
> [https://github.com/apache/orc/blob/40ee321b209cad1de73fc97b653636aa0fff28f6/c++/src/sargs/SargsApplier.hh#L79-L81]
> However, we are lack of an interface in RowReader to expose the metrics. Note
> that sargsApplier is a private member inside RowReaderImpl. We need an
> interface to expose it or only its stats.
> It'd also be useful if we expose other metrics of a RowReader, e.g. acutal
> mem usage, time elapsed in decoding/decompression, time elapsed in evaluating
> SearchArguments.
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
