GitHub user dosubot[bot] added a comment to the discussion: Why is the cache
not used when querying vertices through an index?
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The cache is not used when querying vertices through an index, such as in the
query `g.V().hasLabel("server")`, because this query uses `indexQuery`, which
directly interacts with the index to retrieve the vertices. The `indexQuery`
method is optimized for quick lookups using the index, bypassing the need for
caching.
In contrast, the query `g.V('1:xx').bothE().dedup()` uses
`CachedGraphTransaction`, which benefits from caching mechanisms. This is
because such queries involve traversals and deduplication operations that can
be optimized by caching previously retrieved data to avoid redundant database
accesses. The `CachedGraphTransaction` class manages caching for vertices and
edges, allowing traversal queries to utilize cached data when available, thus
enhancing performance by reducing the need for repeated backend queries
<sup>[[1]](https://github.com/apache/incubator-hugegraph/blob/master/hugegraph-server/hugegraph-core/src/main/java/org/apache/hugegraph/backend/tx/GraphIndexTransaction.java)</sup><sup>[[2]](https://github.com/apache/incubator-hugegraph/blob/master/hugegraph-server/hugegraph-core/src/main/java/org/apache/hugegraph/backend/cache/CachedGraphTransaction.java)</sup>.
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GitHub link:
https://github.com/apache/incubator-hugegraph/discussions/2713#discussioncomment-11661405
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