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Show / Hide Table of Contents
  • Administrator's Guide
  • NCache Architecture
    • Cache Topologies
    • Cache Cluster
    • Local Cache
    • Cache Client
    • Client Cache
    • Data Load Balancing
    • Cache Server Backward Compatibility
    • Client Backward Compatibility
    • Eviction
    • Indexing
    • Runtime Data Sharing
    • Portable Data Types
    • Class Versioning
    • IP Binding with Multiple NICs
    • Graceful Node Down
    • Separate Cache Host Process
    • Self Healing Dynamic Clustering
  • Configuring Caches
    • Create Cache
      • Creating Local Cache
        • Create New Cache
        • Add Existing Cache
      • Creating Clustered Cache
        • Create New Cache Cluster
        • Add Existing Cache Cluster
    • Remove Cache
    • Clear Cache Contents
    • Adding Server Node in Cache Cluster
    • Removing Server Node from Cache Cluster
    • Configuring Basic Cache Settings
      • Cache Size
      • Cache Isolation Levels
      • Cache Data Expiration
      • Cache Data Format
    • Configuring Cache Cluster Settings
      • Ports
      • Operation Timeout
      • Static Replication Interval
      • Connection Retries
      • Retry Interval
    • Add Test Data to Cache
    • Deploy Providers
    • Configuring Query Indexes
    • Registering Classes for Compact Serialization
      • Registering Non-Generic Classes
      • Unregistering Non-Generic Classes
      • Registering Generic Classes
      • Registering Generic Classes Using Generic Type Handler
    • Registering Classes for Portable Data Sharing
    • Configuring Data Source Providers
      • Read-Through Provider
      • Write-Through Provider
      • Write-Through Provider for Write-Behind Operations
    • Configuring Cache Startup Loader
    • Configuring Cache Level Events
    • Configuring Cache Activity Events
    • Configuring Eviction Policy
    • Configuring Compression
    • Configuring Email Notifications
    • Binding Cluster and Client/Server IP with Multiple NICs
      • Binding Cluster with a Dedicated IP
      • Binding Client/Server with a Dedicated IP
    • Configuring Heartbeat
    • Configuring MapReduce
    • Configuring Communication Reliability
    • Auto Start Cache on Boot
    • Nagling
    • Dual Socket
    • Error Logging
    • Configuration Files
      • Client Side Configurations
        • Client Config
        • EFCaching Config
      • Server Side Configurations
        • Cache Config
        • Bridge Config
        • Security Config
      • Cache Server Configuration
  • Management Operations
    • Start Cache
    • Stop Cache
    • Restart Cache
    • Manage Cache Service on a Server Node
    • Apply Configuration
    • Hot Apply Configuration
    • Reset Configuration
    • Data Load Balancing
  • Configuring Cache Clients
    • Adding Client Node in Cluster
    • Removing Client Node from Cluster
    • Configuring Client Node Settings
    • Creating Client Cache
    • Enable Client Cache on Client Nodes
    • Disable Client Cache on Client Nodes
    • Removing Client Cache
    • Configuring Client Cache Settings
  • Configuring Security
    • Configuring Security for Cache Management
    • Configuring Security for Cache
    • Configuring Security for Client Nodes
    • Configuring Encryption for Cache
    • Configure SSL/TLS Encryption in NCache
  • Configuring Bridge for WAN Replication
    • Creating Clustered Bridge
    • Adding Clustered Caches to Bridge
    • Configuring Bridge Settings
    • Configuring Conflict Resolver
    • Changing Cache Syncronization Modes
    • Configuring Master Cache
    • Force State Transfer
    • Connect/Disconnect Cache in Bridge
    • Remove Cache from Bridge
    • Bridge Management
  • NCache on Docker
    • Using NCache Docker Images
    • Customize NCache Dockerfile
  • Monitoring NCache
    • Cache Counters
    • Monitoring Caches using NCache Manager
      • Changing Management Port of Cache Node
      • Configuring Counters to Display
      • Browse Cache Statistics
      • Cluster Health
      • Monitoring Cache Clusters using NCache Email Alerts
    • Monitoring Caches using NCache Monitor
      • Monitoring with Built-In Dashboard
      • Monitoring with Custom Dashboard
    • Monitoring Bridge using NCache Manager
    • Monitoring NCache using Windows PerfMon Tool
      • Monitoring Cache Server Counters Using PerfMon
      • Monitoring Cache Client Counters Using PerfMon
      • Monitoring Bridge Counters Using PerfMon
    • Logging in NCache
      • NCache Log Viewer
      • NCache Monitor Logging
      • Performance Counters Logging
      • Windows Event Logging
      • Email Notifications on NCache Events
      • Cache Server Logging
      • Client Side API Logging
      • Cache Event IDs
    • Troubleshooting NCache Monitoring
      • Computer Name Not Found
      • Diskperf Not Installed
      • No READ Access to the Perflib Subkeys
      • Unable to Connect to Remote Server
    • IPV6 Support
  • Upgrading NCache Versions
    • Live Upgrade NCache Version
    • Upgrade NCache Version Offline
  • Apply Windows Patches on NCache Server

Cache Size

Through this configuration option, you can specify an upper limit on the size of the cache in MB. The number of items in the cache are limited by maximum size of the cache and amount of free system memory (virtual or physical). If some eviction policy is specified, whenever total data size in cache reaches maximum size or when less than 10% of memory is left in the system, items are removed from the cache as per eviction policy. Maximum size of a cache can be specified by one of following two ways.

Using NCache Manager

  • Click on the cache name in Cache Explorer to open cache settings.

  • Go to the Main tab.

  • Change the Cache Max Size as per your needs.

  • Right click the cache in Cache Explorer and select Apply Configuration option.

Using Windows PowerShell

New-Cache cmdlet enables the user to create a new cache on one or more server nodes.

This command creates a local cache of size 1024MB on test1 node. Here, instead of 1024, any size can be mentioned.

New-Cache cache -Server test1 -Size 1024

Manually Editing NCache Configuration

Important

Make sure the cache is stopped before making any configuration changes.

You can specify the Cache Size through config.ncconf by specifying the <storage> tag under the <cache-settings> tag:

 <cache-settings cache-name="this" alias="" inproc="False" last-modified="" auto-start="True" data-format="Binary">
    ...
    <storage type="heap" cache-size="1024mb"/>
    ...
</cache-settings>
  • Once changes are made, start the cache and restart NCache service.

Troubleshooting

Out of Memory Problem

This usually happens when Maximum Size for the cache is not specified correctly. Often, processing overhead is not kept into consideration while specifying the Maximum Size.

Workaround

In order to resolve out of memory issue, NCache has provided a memory based cache, where you can specify an upper limit on the size of the cache in MB. Please specify correct Maximum Size for your cache. You should specify a Maximum Size which, if completely consumed, still leaves enough space in the system so that it never goes under low resources.

While specifying the cache size, consider the following factors:

  • Average size of Sessions or Objects.
  • Number of expected Sessions or Objects.
  • Available memory for the NCache process.

Then you can calculate the required memory by keeping the following in mind.

  • 15% Overhead per session.
  • 15-20% overhead for processing. If object size is greater than 80KB, this ratio may be little bit high.
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