# Amazon Neptune Engine Updates 2019-08-13
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## IMPORTANT: THIS ENGINE VERSION IS NOW DEPRECATED
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Starting from 2021-04-27, no new instances using this engine version will be created.

## New Features in This Engine Release
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+ Added an `OVERSUBSCRIBE` option to the `parallelism` parameter of the [Neptune Loader Command](load-api-reference-load.md), which causes the Neptune bulk loader to use all available threads and resources.

## Improvements in This Engine Release
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+ Improved performance of SPARQL filters containing simple logical OR expressions.
+ Improved Gremlin performance in handling conjunctive predicates.

## Defects Fixed in This Engine Release
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+ Fixed a SPARQL bug preventing subtraction of an `xsd:duration` from an `xsd:date`.
+ Fixed a SPARQL bug causing incomplete results from static inlining in the presence of a `UNION`.
+ Fixed a SPARQL bug in query cancellation.
+ Fixed a Gremlin bug causing overflow during type promotion.
+ Fixed a Gremlin bug in the handling of vertex elements in `addE().from().to()` steps.
+ Fixed a Gremlin bug (released 2019-07-26 in [Engine version 1.0.1.0.200366.0](engine-releases-1.0.1.0.200366.0.md)) involving the handling of NaN doubles and floats in single-cardinality inserts.
+ Fixed a bug in generating query plans involving property based searches.