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Important

Helios features are now enabled during weekly update windows and are no longer directly tied to SingleStore engine releases. Refer to the release notes to view the latest features available in your Helios cluster.

_SYNC_PLANS

The _SYNC_PLANS command synchronizes a node's local PPC with the DPC for a specific database.

_SYNC_PLANS <dbName>;

When this command is run on a node, it downloads up to distributed_plancache_max_download_plans from the DPC to that node's local PPC for the specified database.

The _SYNC_PLANS command first downloads one plan per table in the database. Query plans are downloaded only after these "table plans" are downloaded. For databases in which the number of tables in the database is close to the value of distributed_plancache_max_download_plans, SingleStore recommends increasing the value of distributed_plancache_max_download_plans to a value greater than the number of tables in the database before running the command.

When the _SYNC_PLANS command is run, a synchronization task will be added to the DPC task queue regardless of whether enable_distributed_plancache is set to ON or OFF. If the request is enqueued while enable_distributed_plancache is set to OFF, the task will run when enable_distributed_plancache is set to ON.

Refer to Distributed Plancache for more information.

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Verification instructions

Note: You must install cosign to verify the authenticity of the SingleStore file.

Use the following steps to verify the authenticity of singlestoredb-server, singlestoredb-toolbox, singlestoredb-studio, and singlestore-client SingleStore files that have been downloaded.

You may perform the following steps on any computer that can run cosign, such as the main deployment host of the cluster.

  1. (Optional) Run the following command to view the associated signature files.

    curl undefined

  2. Download the signature file from the SingleStore release server.

    • Option 1: Click the Download Signature button next to the SingleStore file.

    • Option 2: Copy and paste the following URL into the address bar of your browser and save the signature file.

    • Option 3: Run the following command to download the signature file.

      curl -O undefined

  3. After the signature file has been downloaded, run the following command to verify the authenticity of the SingleStore file.

    echo -n undefined |
        cosign verify-blob --certificate-oidc-issuer https://oidc.eks.us-east-1.amazonaws.com/id/CCDCDBA1379A5596AB5B2E46DCA385BC \
          --certificate-identity https://kubernetes.io/namespaces/freya-production/serviceaccounts/job-worker \
          --bundle undefined \
          --new-bundle-format -
    Verified OK

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