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Memorystore for Memcached supports a subset of native Memcached configuration parameters
that you can modify. You should use the same configurations for all nodes in
your cluster. This page describes how to:
View instance configurations.
Modify instance configurations by:
Staging instance configuration changes.
Updating node configuration changes.
Memorystore for Memcached requires you to update the configurations first, and then
apply the changes to the nodes in your cluster. Applying a parameter update to
a node causes a full cache flush on that node.
The advantage to being able to apply parameter updates to individual nodes is
that you can roll out changes on a node-by-node basis. Doing so keeps your
instance online and functional while you update configurations.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-28 UTC."],[],[],null,["# Configure a Memcached instance\n\nMemorystore for Memcached supports a subset of [native Memcached configuration parameters](https://manpages.debian.org/unstable/memcached/memcached.1.en.html)\nthat you can modify. You should use the same configurations for all nodes in\nyour cluster. This page describes how to:\n\n- View instance configurations.\n- Modify instance configurations by:\n - Staging instance configuration changes.\n - Updating node configuration changes.\n\nMemorystore for Memcached requires you to update the configurations first, and then\napply the changes to the nodes in your cluster. Applying a parameter update to\na node causes a full cache flush on that node.\n\nThe advantage to being able to apply parameter updates to individual nodes is\nthat you can roll out changes on a node-by-node basis. Doing so keeps your\ninstance online and functional while you update configurations.\n\nFor a full list of the modifiable and unmodifiable parameters, see [Memcached configuration parameters](/memorystore/docs/memcached/memcached-configs).\n\nViewing configurations\n----------------------\n\n### Console\n\n1. Go to the **Memorystore for Memcached** page in the Google Cloud console. \n [Memorystore for Memcached](https://console.cloud.google.com/memorystore/memcached/instances)\n2. Click the ID of the instance to view the **Instance details** page.\n3. View your settings in the **Configuration** section.\n\n### Gcloud\n\nTo view configuration parameters using the Google Cloud CLI, enter\nthe `describe` command for the instance replacing \u003cvar translate=\"no\"\u003evariables\u003c/var\u003e\nwith appropriate values: \n\n```\ngcloud memcache instances describe instance-id --region=region\n```\n| **Note:** You won't see configuration parameters when running `describe` unless you have changed a configuration from its default value.\n\nFor a list of modifiable configuration parameters and their default values,\nsee [Memcached configuration parameters.](/memorystore/docs/memcached/memcached-configs)\n\nModifying configuration parameters\n----------------------------------\n\n### Console\n\n1. Go to the **Memorystore for Memcached** page in the Google Cloud console. \n [Memorystore for Memcached](https://console.cloud.google.com/memorystore/memcached/instances)\n2. Click the ID of the instance.\n3. Click **Edit Configuration**.\n4. Adjust the value of any parameter that you want to change.\n5. Click the **Continue** button to stage the configuration updates.\n6. Select a node, and click **Update Selected Nodes** one at a time for\n each node, or in batches of nodes.\n\n | **Note:** Updating node configurations one at a time, or in batches, helps you avoid instance unavailability and reduces data loss.\n\n### Gcloud\n\n1. Update the configuration parameters by running the following command:\n\n ```\n gcloud memcache instances update instance-id --region=region --parameters=parameter=value,parameter=value\n ```\n2. List and take note of all node IDs for your instance by running the\n following command:\n\n ```\n gcloud memcache instances describe instance-id --region=region --format=\"value(memcacheNodes.nodeId.list())\"\n ```\n3. Apply the parameters one by one, or in batches, to nodes in your cluster\n by running the following command:\n\n **Note:** Updating node configurations one at a time, or in batches, helps you avoid instance unavailability and reduces data loss. \n\n ```\n gcloud memcache instances apply-parameters instance-id --region=region --node-ids=node-1-id,node-2-id\n ```\n\n Alternatively, you can apply the parameters for all nodes at once by\n using the following command, but we don't recommend it: \n\n ```\n gcloud memcache instances apply-parameters instance-id --region=region --apply-all\n ```\n\nYou cannot simultaneously run the`--parameters` flag with any other flags\nwhen using the Memorystore for Memcached `update` command.\n\nConfiguring parameters using gcloud during instance creation\n------------------------------------------------------------\n\nTo set configuration parameters during creation, enter the following command\nreplacing variables with appropriate values: \n\n```\ngcloud memcache instances create instance-name --size=size --region=region --parameters=parameter=value,parameter=value\n```\n\nYou can simultaneously run the `--parameters` flag with all other flags when\nusing the Memorystore for Memcached `create` command.\n\nClearing configuration parameters to default values using the Google Cloud console\n----------------------------------------------------------------------------------\n\n1. Go to the **Memorystore for Memcached** page in the Google Cloud console. \n [Memorystore for Memcached](https://console.cloud.google.com/memorystore/memcached/instances)\n2. Click the ID of the instance.\n3. Click **Edit Configuration**.\n4. Delete the value of any parameter that you want to reset to default, and leave the field blank.\n5. Click the **Continue** button to stage the configuration updates.\n6. Select a node, and click **Update Selected Nodes** one at a time for each\n node, or in batches of nodes.\n\n | **Note:** Updating node configurations one at a time, or in batches, helps you avoid instance unavailability and reduces data loss.\n\nWhat's next\n-----------\n\n- Review the available [Memcached configurations](/memorystore/docs/memcached/memcached-configs).\n- Learn how to [scale your Memcached instances](/memorystore/docs/memcached/scaling-instances)."]]
