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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>
86 lines
3.0 KiB
XML
86 lines
3.0 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
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<!--
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Licensed to the Apache Software Foundation (ASF) under one
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or more contributor license agreements. See the NOTICE file
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distributed with this work for additional information
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regarding copyright ownership. The ASF licenses this file
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to you under the Apache License, Version 2.0 (the
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"License"); you may not use this file except in compliance
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with the License. You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing,
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software distributed under the License is distributed on an
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"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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KIND, either express or implied. See the License for the
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specific language governing permissions and limitations
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under the License.
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-->
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<!DOCTYPE concept PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd">
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<concept id="buffer_pool_limit" rev="2.10.0 IMPALA-3200">
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<title>BUFFER_POOL_LIMIT Query Option</title>
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<titlealts audience="PDF"><navtitle>BUFFER POOL LIMIT</navtitle></titlealts>
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<prolog>
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<metadata>
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<data name="Category" value="Impala"/>
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<data name="Category" value="Impala Query Options"/>
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<data name="Category" value="Querying"/>
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<data name="Category" value="Developers"/>
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<data name="Category" value="Data Analysts"/>
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</metadata>
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</prolog>
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<conbody>
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<p>
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<indexterm audience="hidden">BUFFER_POOL_LIMIT query option</indexterm>
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Defines a limit on the amount of memory that a query can allocate from the
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internal buffer pool. The value for this limit applies to the memory on each host,
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not the aggregate memory across the cluster. Typically not changed by users, except
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during diagnosis of out-of-memory errors during queries.
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</p>
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<p conref="../shared/impala_common.xml#common/type_integer"/>
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<!-- BUFFER_POOL_LIMIT: [0] -->
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<p conref="../shared/impala_common.xml#common/default_blurb"/>
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<p>
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The default setting for this option is the lower of 80% of the
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<codeph>MEM_LIMIT</codeph> setting, or the <codeph>MEM_LIMIT</codeph>
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setting minus 100 MB.
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</p>
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<p conref="../shared/impala_common.xml#common/added_in_2100"/>
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<p conref="../shared/impala_common.xml#common/usage_notes_blurb"/>
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<p>
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If queries encounter out-of-memory errors, consider decreasing the
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<codeph>BUFFER_POOL_LIMIT</codeph> setting to less than 80% of the
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<codeph>MEM_LIMIT setting</codeph>.
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</p>
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<p conref="../shared/impala_common.xml#common/example_blurb"/>
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<codeblock><![CDATA[
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-- Set an absolute value.
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set buffer_pool_limit=8GB;
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-- Set a relative value based on the MEM_LIMIT setting.
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set buffer_pool_limit=80%;
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]]>
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</codeblock>
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<p conref="../shared/impala_common.xml#common/related_info"/>
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<p>
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<xref keyref="default_spillable_buffer_size"/>,
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<xref keyref="max_row_size"/>,
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<xref keyref="min_spillable_buffer_size"/>,
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<xref keyref="scalability_buffer_pool"/>
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</p>
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</conbody>
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</concept>
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