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Added section on index build time [skip ci]

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Andrew Kane
2024-01-09 13:27:27 -08:00
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README.md
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@@ -190,6 +190,22 @@ CREATE INDEX ON items USING hnsw (embedding vector_cosine_ops);
Vectors with up to 2,000 dimensions can be indexed.
### Index Build Time
Indexes build significantly faster when the graph fits into `maintenance_work_mem`
```sql
SET maintenance_work_mem = '8GB';
```
A notice is shown when the graph no longer fits
```text
NOTICE: hnsw graph no longer fits into maintenance_work_mem after 100000 tuples
DETAIL: Building will take significantly more time.
HINT: Increase maintenance_work_mem to speed up builds.
```
### Index Options
Specify HNSW parameters