mirror of
https://github.com/apache/impala.git
synced 2025-12-19 09:58:28 -05:00
eadd35f6d5
The recent documentation formatting changes introduced the navigation panel on the left. However, due to the length of the query options navigation title these could overlap with the documentation paragraphs. This commit removes the underscores from the navigation titles of the query options, so browsers can break them into multiple lines. Additionally, the "SET" and "Query Options for the SET Statement" pages are merged to save some more space for the query option navigation titles. Testing: - Built the documentation and tested manually Change-Id: Icec787d7a2af848aaaff65be2ecf311a5ce8fe7f Reviewed-on: http://gerrit.cloudera.org:8080/20556 Tested-by: Impala Public Jenkins <impala-public-jenkins@cloudera.com> Reviewed-by: Jason Fehr <jfehr@cloudera.com> Reviewed-by: Peter Rozsa <prozsa@cloudera.com> Reviewed-by: Tamas Mate <tmater@apache.org>
85 lines
2.5 KiB
XML
85 lines
2.5 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
|
|
<!--
|
|
Licensed to the Apache Software Foundation (ASF) under one
|
|
or more contributor license agreements. See the NOTICE file
|
|
distributed with this work for additional information
|
|
regarding copyright ownership. The ASF licenses this file
|
|
to you under the Apache License, Version 2.0 (the
|
|
"License"); you may not use this file except in compliance
|
|
with the License. You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing,
|
|
software distributed under the License is distributed on an
|
|
"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
|
|
KIND, either express or implied. See the License for the
|
|
specific language governing permissions and limitations
|
|
under the License.
|
|
-->
|
|
<!DOCTYPE concept PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd">
|
|
<concept rev="3.2.0" id="resource_trace_ratio">
|
|
|
|
<title>RESOURCE_TRACE_RATIO Query Option (<keyword keyref="impala32_full"/> or higher only)</title>
|
|
|
|
<titlealts audience="PDF">
|
|
|
|
<navtitle>RESOURCE TRACE RATIO</navtitle>
|
|
|
|
</titlealts>
|
|
|
|
<prolog>
|
|
<metadata>
|
|
<data name="Category" value="Impala"/>
|
|
<data name="Category" value="Impala Query Options"/>
|
|
<data name="Category" value="Querying"/>
|
|
<data name="Category" value="Developers"/>
|
|
<data name="Category" value="Data Analysts"/>
|
|
</metadata>
|
|
</prolog>
|
|
|
|
<conbody>
|
|
|
|
<p>
|
|
The <codeph>RESOURCE_TRACE_RATIO</codeph> query option specifies the ratio of queries
|
|
where the CPU usage info will be included in the profiles. Collecting CPU usage and
|
|
sending it around adds a slight overhead during query execution. This query option lets
|
|
you control whether to collect additional information to diagnose the resource usage.
|
|
</p>
|
|
|
|
<p>
|
|
For example, setting <codeph>RESOURCE_TRACE_RATIO=1</codeph> adds a trace of the CPU usage
|
|
to the profile of each query.
|
|
</p>
|
|
|
|
<p>
|
|
Setting <codeph>RESOURCE_TRACE_RATIO=0.5</codeph> means that randomly selected half of all
|
|
queries will have that information collected by the coordinator and included in the
|
|
profiles.
|
|
</p>
|
|
|
|
<p>
|
|
Setting <codeph>RESOURCE_TRACE_RATIO=0</codeph> means that CPU usage will not be tracked
|
|
and included in the profiles.
|
|
</p>
|
|
|
|
<p>
|
|
Values from 0 to 1 are allowed.
|
|
</p>
|
|
|
|
<p>
|
|
<b>Type:</b> Number
|
|
</p>
|
|
|
|
<p>
|
|
<b>Default:</b> 0
|
|
</p>
|
|
|
|
<p>
|
|
<b>Added in:</b> <keyword keyref="impala32"/>
|
|
</p>
|
|
|
|
</conbody>
|
|
|
|
</concept>
|