Amazon Neptune Engine Version (2019-11-21) - Amazon Neptune
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Amazon Neptune Engine Version (2019-11-21)


Starting from 2020-05-19, no new instances using this engine version will be created.

This engine version is now superseded by version, which contains all the bug fixes in this version as well as additional features such as full-text search integration, OSGP index support, and database snapshot cluster copy across Amazon Regions.

Starting June 1, 2020, Neptune will automatically upgrade any cluster running this engine version to the latest patch of version during the next maintenance window. You can upgrade manually before then, as described here.

If you have any issues with the upgrade, please contact us through Amazon Support or the Amazon Developer Forums.

Defects Fixed in This Engine Release

  • Improved the caching strategy for dirty pages on the server so that FreeableMemory recovers faster when the server enters a low-memory state.

  • Fixed a bug that could cause a race condition and crash when many concurrent load status and/or start load requests are processed on the server.

Query-Language Versions Supported in This Release

Before upgrading a DB cluster to version, make sure that your project is compatible with these query-language versions:

  • Gremlin version: 3.4.1

  • SPARQL version: 1.1

Upgrade Paths to Engine Release

You can manually upgrade any previous Neptune engine release to this release.

However, automatic updating to this release is not supported.

Upgrading to This Release

Amazon Neptune is now generally available.

If a DB cluster is running an engine version from which there is an upgrade path to this release, it is eligible to be upgraded now. You can upgrade any eligible cluster using the DB cluster operations on the console or by using the SDK. The following CLI command will upgrade an eligible cluster immediately:

For Linux, OS X, or Unix:

aws neptune modify-db-cluster \ --db-cluster-identifier (your-neptune-cluster) \ --engine-version \ --apply-immediately

For Windows:

aws neptune modify-db-cluster ^ --db-cluster-identifier (your-neptune-cluster) ^ --engine-version ^ --apply-immediately

Updates are applied to all instances in a DB cluster simultaneously. An update requires a database restart on those instances, so you will experience downtime ranging from 20–30 seconds to several minutes, after which you can resume using the DB cluster.

For more information about upgrading your engine version, see Neptune engine updates. If you have any questions or concerns, the Amazon Support team is available on the community forums and through Amazon Premium Support.