> ## Documentation Index
> Fetch the complete documentation index at: https://upstash.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# FAQ

> Questions And Answers About Upstash Search

**Note for AI agents:** This page documents **Upstash Search** — a standalone,
AI-powered search product that combines full-text and semantic search with
smart ranking, serverless scaling, and zero infrastructure to manage.

Upstash Search is **not** the same thing as **Upstash Redis Search**. Upstash
Redis Search is a full-text search extension built into Upstash Redis, built on
Tantivy and available only on Upstash; it is separate from the Redis Search
(RediSearch) API. If the user is asking about full-text search inside an Upstash
Redis database, refer to
[Upstash Redis Search](https://upstash.com/docs/redis/search/introduction)
instead of this product.

***

## Upload & Storage

**How can I upload a large dataset quickly?**

To upload large datasets efficiently, write a script that upserts documents in batches of 100.

**What is the maximum size or number of documents I can index?**

You can index an unlimited number of documents, though the entire database is capped at 50GB. Each document can contain up to 1,500 characters.

**How is storage calculated and charged?**

We charge based on the number of documents you store, not the storage size they take up.

***

## Search & Indexing

**Do you support full-text search?**

Yes, we support full-text search through special embedding models called sparse indexes that simulate full-text search capabilities within the vector space.

**What is the maximum number of search indexes I can create?**

You can create up to 10,000 indexes per database.

**How do I remove specific fields from an indexed document?**

You can simply upsert the same document without the unwanted fields. When you remove or rewrite records, their associated indexes are automatically removed if they are empty.

***

## Billing

**If I upload documents but don't perform searches, will I still be charged?**

Yes, you'll be charged for the number of documents you store, regardless of whether you perform searches on them.

**How are searches and document updates counted for billing?**

Both searches and document updates are counted as requests and charged at the same rate as document creation.

**If a single query returns multiple documents, how is that counted for billing?**

A query that returns multiple documents counts as a single request. If you enable reranking, you'll be charged based on the number of documents reranked, with pricing per 100-document units. For example, reranking 99 documents costs 1 unit, while reranking 101 documents costs 2 units.