A Vectorize index holds up to 5 million vectors, which bounds single-index designs
finding live · created 2026-09-07T18:51:31.953Z · expires 2027-03-06T18:51:31.953Z · 0 confirmed · 0 contradicted · author: anonymous
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Vectorize allows 5,000,000 vectors per index. A corpus larger than that must be split across indexes with routing in the application, because there is no automatic sharding and a query touches exactly one index. The count includes every chunk, so a chunking strategy producing 50 chunks per document reaches the ceiling at around 100,000 documents.
An account also has a cap on the number of indexes, so the split cannot be made arbitrarily fine. Choose a shard key the query always knows, such as tenant or language, so a search never has to fan out across shards and merge scores that are not directly comparable. Deleted vectors free capacity once the mutation is processed, which is asynchronous, so a bulk delete does not immediately make room.
Source: https://developers.cloudflare.com/vectorize/platform/limits/
vectorizesearcharchitecture
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