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>.NET Thin Client</a>
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>C++ Thin Client</a>
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<li><a href="/docs/2.9.1/binary-client-protocol/key-value-queries" class=''>Key-Value Queries</a></li>
<li><a href="/docs/2.9.1/binary-client-protocol/sql-and-scan-queries" class=''>SQL and Scan Queries</a></li>
<li><a href="/docs/2.9.1/binary-client-protocol/binary-type-metadata" class=''>Binary Types Metadata</a></li>
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<a href="/docs/2.9.1/data-modeling/data-modeling"
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<a href="/docs/2.9.1/data-modeling/affinity-collocation"
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<a href="/docs/2.9.1/data-modeling/binary-marshaller"
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<button type='button' class='group-toggle expanded '>Configuring Memory<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
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</li>
<li>
<a href="/docs/2.9.1/persistence/swap"
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</li>
<li>
<a href="/docs/2.9.1/persistence/custom-cache-store"
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<li>
<a href="/docs/2.9.1/persistence/snapshots"
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</li>
<li>
<a href="/docs/2.9.1/persistence/disk-compression"
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<li>
<a href="/docs/2.9.1/persistence/persistence-tuning"
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<button type='button' class='group-toggle collapsed '>Configuring Caches<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
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<a href="/docs/2.9.1/configuring-caches/configuration-overview"
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<li>
<a href="/docs/2.9.1/configuring-caches/configuring-backups"
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</li>
<li>
<a href="/docs/2.9.1/configuring-caches/partition-loss-policy"
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>Partition Loss Policy</a>
</li>
<li>
<a href="/docs/2.9.1/configuring-caches/atomicity-modes"
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>Atomicity Modes</a>
</li>
<li>
<a href="/docs/2.9.1/configuring-caches/expiry-policies"
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</li>
<li>
<a href="/docs/2.9.1/configuring-caches/on-heap-caching"
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</li>
<li>
<a href="/docs/2.9.1/configuring-caches/cache-groups"
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<li>
<a href="/docs/2.9.1/configuring-caches/near-cache"
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<li>
<a href="/docs/2.9.1/data-rebalancing" class='' >Data Rebalancing</a>
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<a href="/docs/2.9.1/data-streaming" class='' >Data Streaming</a>
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<button type='button' class='group-toggle collapsed '>Using Key-Value API<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
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<a href="/docs/2.9.1/key-value-api/basic-cache-operations"
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<a href="/docs/2.9.1/key-value-api/binary-objects"
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<a href="/docs/2.9.1/key-value-api/using-scan-queries"
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<li>
<a href="/docs/2.9.1/read-repair"
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<li>
<a href="/docs/2.9.1/key-value-api/transactions" class='' >Performing Transactions</a>
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<a href="/docs/2.9.1/SQL/sql-introduction"
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<a href="/docs/2.9.1/SQL/indexes"
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<a href="/docs/2.9.1/sql-reference/ddl"
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<a href="/docs/2.9.1/sql-reference/dml"
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<li>
<a href="/docs/2.9.1/sql-reference/transactions"
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<a href="/docs/2.9.1/sql-reference/operational-commands"
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>Operational Commands</a>
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<a href="/docs/2.9.1/sql-reference/aggregate-functions"
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>Aggregate functions</a>
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<a href="/docs/2.9.1/sql-reference/numeric-functions"
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>Numeric Functions</a>
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<a href="/docs/2.9.1/sql-reference/string-functions"
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<li>
<a href="/docs/2.9.1/sql-reference/date-time-functions"
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<a href="/docs/2.9.1/sql-reference/system-functions"
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<a href="/docs/2.9.1/sql-reference/data-types"
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<a href="/docs/2.9.1/distributed-computing/cluster-groups"
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</li>
<li>
<a href="/docs/2.9.1/distributed-computing/executor-service"
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>Executor Service</a>
</li>
<li>
<a href="/docs/2.9.1/distributed-computing/map-reduce"
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>MapReduce API</a>
</li>
<li>
<a href="/docs/2.9.1/distributed-computing/load-balancing"
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>Load Balancing</a>
</li>
<li>
<a href="/docs/2.9.1/distributed-computing/fault-tolerance"
class=''
>Fault Tolerance</a>
</li>
<li>
<a href="/docs/2.9.1/distributed-computing/job-scheduling"
class=''
>Job Scheduling</a>
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<li>
<a href="/docs/2.9.1/distributed-computing/collocated-computations"
class=''
>Colocating Computations with Data</a>
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<a href="/docs/2.9.1/code-deployment/deploying-user-code"
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<a href="/docs/2.9.1/code-deployment/peer-class-loading"
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<a href="/docs/2.9.1/machine-learning/partition-based-dataset"
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>Partition Based Dataset</a>
</li>
<li>
<a href="/docs/2.9.1/machine-learning/updating-trained-models"
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<button
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<li><a href="/docs/2.9.1/machine-learning/binary-classification/introduction" class=''>Introduction</a></li>
<li><a href="/docs/2.9.1/machine-learning/binary-classification/linear-svm" class=''>Linear SVM (Support Vector Machine)</a></li>
<li><a href="/docs/2.9.1/machine-learning/binary-classification/decision-trees" class=''>Decision Trees</a></li>
<li><a href="/docs/2.9.1/machine-learning/binary-classification/multilayer-perceptron" class=''>Multilayer Perceptron</a></li>
<li><a href="/docs/2.9.1/machine-learning/binary-classification/logistic-regression" class=''>Logistic Regression</a></li>
<li><a href="/docs/2.9.1/machine-learning/binary-classification/knn-classification" class=''>k-NN Classification</a></li>
<li><a href="/docs/2.9.1/machine-learning/binary-classification/ann" class=''>ANN (Approximate Nearest Neighbor)</a></li>
<li><a href="/docs/2.9.1/machine-learning/binary-classification/naive-bayes" class=''>Naive Bayes</a></li>
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<li><a href="/docs/2.9.1/machine-learning/regression/introduction" class=''>Introduction</a></li>
<li><a href="/docs/2.9.1/machine-learning/regression/linear-regression" class=''>Linear Regression</a></li>
<li><a href="/docs/2.9.1/machine-learning/regression/decision-trees-regression" class=''>Decision Trees Regression</a></li>
<li><a href="/docs/2.9.1/machine-learning/regression/knn-regression" class=''>k-NN Regression</a></li>
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<li>
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<li><a href="/docs/2.9.1/machine-learning/clustering/introduction" class=''>Introduction</a></li>
<li><a href="/docs/2.9.1/machine-learning/clustering/k-means-clustering" class=''>K-Means Clustering</a></li>
<li><a href="/docs/2.9.1/machine-learning/clustering/gaussian-mixture" class=''>Gaussian mixture (GMM)</a></li>
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</li>
<li>
<a href="/docs/2.9.1/machine-learning/preprocessing"
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<li><a href="/docs/2.9.1/machine-learning/model-selection/introduction" class=''>Introduction</a></li>
<li><a href="/docs/2.9.1/machine-learning/model-selection/evaluator" class=''>Evaluator</a></li>
<li><a href="/docs/2.9.1/machine-learning/model-selection/split-the-dataset-on-test-and-train-datasets" class=''>Split the dataset on test and train datasets</a></li>
<li><a href="/docs/2.9.1/machine-learning/model-selection/hyper-parameter-tuning" class=''>Hyper-parameter tuning</a></li>
<li><a href="/docs/2.9.1/machine-learning/model-selection/pipeline-api" class=''>Pipeline API</a></li>
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</li>
<li>
<a href="/docs/2.9.1/machine-learning/multiclass-classification"
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>Multiclass Classification</a>
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<li>
<button
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<li><a href="/docs/2.9.1/machine-learning/ensemble-methods/introduction" class=''></a></li>
<li><a href="/docs/2.9.1/machine-learning/ensemble-methods/stacking" class=''>Stacking</a></li>
<li><a href="/docs/2.9.1/machine-learning/ensemble-methods/baggin" class=''>Bagging</a></li>
<li><a href="/docs/2.9.1/machine-learning/ensemble-methods/random-forest" class=''>Random Forest</a></li>
<li><a href="/docs/2.9.1/machine-learning/ensemble-methods/gradient-boosting" class=''>Gradient Boosting</a></li>
</nav>
</li>
<li>
<a href="/docs/2.9.1/machine-learning/recommendation-systems"
class=''
>Recommendation Systems</a>
</li>
<li>
<button
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class='collapsed '>Importing Model<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class="sub_pages collapsed">
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<article data-swiftype-index='true'>
<a class='edit-link' href="https://github.com/apache/ignite/tree/IGNITE-7595/docs/_docs/memory-configuration/data-regions.adoc" target="_blank">Edit</a>
<h1>Configuring Data Regions</h1>
<div class="sect1">
<h2 id="overview">Overview</h2>
<div class="sectionbody">
<div class="paragraph">
<p>Ignite uses the concept of <em>data regions</em> to control the amount of RAM available to a cache or a group of caches. A data region is a logical extendable area in RAM in which cached data resides. You can control the initial size of the region and the maximum size it can occupy. In addition to the size, data regions control <a href="/docs/2.9.1/persistence/native-persistence">persistence settings</a> for caches.</p>
</div>
<div class="paragraph">
<p>By default, there is one data region that can take up to 20% of RAM available to the node, and all caches you create are placed in that region; but you can add as many regions as you want. There are a couple of reasons why you may want to have multiple regions:</p>
</div>
<div class="ulist">
<ul>
<li>
<p>Regions allow you to configure the amount of RAM available to a cache or number of caches.</p>
</li>
<li>
<p>Persistence parameters are configured per region. If you want to have both in-memory only caches and the caches that store their content to disk, you need to configure two (or more) data regions with different persistence settings: one for in-memory caches and one for persistent caches.</p>
</li>
<li>
<p>Some memory parameters, such as <a href="/docs/2.9.1/memory-configuration/eviction-policies">eviction policies</a>, are configured per data region.</p>
</li>
</ul>
</div>
<div class="paragraph">
<p>See the following section to learn how to change the parameters of the default data region or configure multiple data regions.</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="configuring-default-data-region">Configuring Default Data Region</h2>
<div class="sectionbody">
<div class="paragraph">
<p>By default, a new cache is added to the default data region. If you want to change the properties of the default data region, you can do so in the data storage configuration.</p>
</div>
<code-tabs><code-tab data-tab='XML'><div class="listingblock">
<div class="content">
<pre class="rouge highlight"><code data-lang="xml"><span class="cp">&lt;?xml version="1.0" encoding="UTF-8"?&gt;</span>
<span class="c">&lt;!--
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