> ## Documentation Index > Fetch the complete documentation index at: https://docs.vainona.ai/llms.txt > Use this file to discover all available pages before exploring further. # Limits > Every limit the API enforces. Sizes are binary: 1 MB is 1,048,576 bytes. | Limit | Value | | --------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | Document state | 1 MB | | Attributes per document | 64 | | Documents per write | 1,000 or 64 MB | | A written document's `created_at` | at most 5 minutes in the future, and not before 1970 | | Judgments per namespace | 100 active | | Versions per judgment | unlimited, retained forever | | Choice options | 254 plus the injected escape option | | Score levels | 2 to 10 | | Compiled context | the engine's limit (jev current: 32,000 tokens), or `max_tokens` if lower | | Questions per engine request | 32 | | `top_k` | 1,000 | | Namespaces per organization | unlimited | | Namespace name | 256 bytes | | Periodic `interval` | at least 1 hour: each run re-judges the whole namespace | | `default/quickstart` | 10,000 documents and 100 MB; a write past that is refused with `too_large`. It is free, and its judging pauses for the month at [its usage limit](/pricing#quickstart) | ## Relations For judgments that read other documents through [relations](/concepts/relations). A request over any of these is refused with `invalid_request`. | Limit | Value | | --------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | Keys in `applies_to` and in each relation's `match` | 8 each | | Relations per judgment | 4, each with a `last_n`, a `window` or both, except one that reads a [referenced document](/guides/referenced-document), which takes neither | | `last_n` on a relation | 1,000 | | Related documents a relation reads | the newest 1,000 created, whatever its `last_n` and `window`; one for a referenced document | | Aggregate paths per relation | 8 across `sum`, `min`, `max` and `latest` | | Bands on a field | 1 to 9 strictly increasing cut points, and one more label, each label up to 64 bytes | | Features per composite judgment | 8 | | Reference indexes per namespace | 3, one per attribute that relations join on, whether related documents point through it or judged documents do, counting judgments inherited from a template; an attribute used both ways is one index, and a fourth is refused and `details.reference_indexes` names the current ones | | Fan-out settings | `fanout.max_wait_ms` at least `fanout.debounce_ms`; `job_above` and `auto_daily_limit` 0 or more; the namespace's `share` above 0 and at most 1 | ## Composite judgments For [composite judgments](/guides/composite-judgments) and their suggested parts. | Limit | Value | | -------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | Parts per composite judgment | 2 to 8; 1 to 8 with features | | `suggest_parts` calls | 20 per judgment and 50 per organization a day, across all its namespaces; past either, `rate_limited` with `details.limit` (20 or 50, the limit reached) and `details.resets_at`, the next midnight UTC, and no `Retry-After`. A call that fails with `engine_unavailable` before the model ran does not count; one that timed out does | | `suggest_parts` `count` | 2 to 8 | | Labelled examples one `suggest_parts` call shows the LLM | at most 30, and 100,000 tokens together: each is cut to its share | | Labelled examples `suggest_parts` needs | 10 of each answer | ## Fan-out defaults For judgments that read the document each judged document points at: when a change to it re-judges the judged documents that point at it (the [fan-out](/guides/referenced-document#fan-out)). Each is a setting you can change with a `PATCH` and no new version. | Setting | Default | | ----------------------------------------------- | ---------------------------------------------------------------------------- | | `fanout.scope.created_within` | 30 days: judged documents created longer before the change keep their answer | | `fanout.scope.where` | none | | `fanout.debounce_ms` | 600,000 (10 minutes) | | `fanout.max_wait_ms` | 6 × `fanout.debounce_ms`, so 3,600,000 | | `fanout.job_above` | 10,000 judged documents, or the namespace's | | `fanout.confirm_jobs` | `true`, or the namespace's | | `fanout.auto_daily_limit` | 100,000 judged documents re-judged automatically in any 24 hours | | Namespace `fanout.share` | 0.5 of the namespace's in-flight engine requests, always at least one | | Documents sampled for a `fanout` job's estimate | 1,000 | ## Requests | Limit | Value | | ----------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | Estimated query scan | 4 GB; larger queries are refused with `too_large` and are not billed | | `wait_ms` on a get | 10,000 ms | | `wait_timeout_ms` on a write | 10,000 ms; a larger value is lowered to it | | Documents of one write judged at interactive priority | the first 16; the rest are judged with ordinary catch-up, so a large `wait_for` write usually returns them `pending` | | Query cursor validity | 10 minutes | | Requests per key | 1,000 per second by default | | Namespace size in v1 | designed for up to 100,000,000 documents or 256 GB. This is the design ceiling, not an enforced limit: a larger namespace is accepted, but its performance is not measured |