No, an upgrade should not cause any downtime. However, on the first startup -
since MinIO will attempt to migrate any existing IAM data - the boot process may
take slightly longer, but may not be visibly noticeable. Once the migration has

This can be very useful for setting up **resources** that you need to use for the whole app, and that are **shared** among requests, and/or that you need to **clean up** afterwards. For example, a database connection pool, or loading a shared machine learning model.

## Use Case { #use-case }

Let's start with an example **use case** and then see how to solve it with this.

Isso pode ser muito útil para configurar **recursos** que você precisa usar por toda a aplicação, e que são **compartilhados** entre as requisições e/ou que você precisa **limpar** depois. Por exemplo, um pool de conexões com o banco de dados ou o carregamento de um modelo de Aprendizado de Máquina compartilhado.

## Caso de uso { #use-case }

Vamos começar com um exemplo de **caso de uso** e então ver como resolvê-lo com isso.

Es verwendet unter der Haube Marshmallow, um die Datenvalidierung durchzuführen. Und es wurde von denselben Entwicklern erstellt.

Es ist ein großartiges Tool und ich habe es auch oft verwendet, bevor ich **FastAPI** hatte.

/// info | Info

Webargs wurde von denselben Marshmallow-Entwicklern erstellt.

///

/// check | Inspirierte **FastAPI**

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 * Fix problems with spdy/3.1 and http/2 where the wrong window size was being
   used.
 * Fix 1.5.0 regression where conditional cache responses could corrupt the
   connection pool.


## Version 1.5.0

_2014-03-07_


##### OkHttp no longer uses the default SSL context.

Applications that want to use the global SSL context with OkHttp should configure their

  }

  /**
   * Creates a TimeLimiter instance using the given executor service to execute method calls.
   *
   * <p><b>Warning:</b> using a bounded executor may be counterproductive! If the thread pool fills
   * up, any time callers spend waiting for a thread may count toward their time limit, and in this
   * case the call may even time out before the target method is ever invoked.
   *

///

Pour éviter de bloquer la boucle d'événements, vous pouvez simplement déclarer la *fonction de chemin d'accès* avec un `def` classique au lieu de `async def`. Ainsi, FastAPI l'exécutera dans un worker de pool de threads, afin d'éviter de bloquer la boucle principale.

{* ../../docs_src/stream_data/tutorial002_py310.py ln[30:34] hl[31] *}

/// tip | Astuce

#dee2e6;\n}\n\n.card-primary.card-outline-tabs > .card-header a.active,\n.card-primary.card-outline-tabs > .card-header a.active:hover {\n  border-top: 3px solid #007bff;\n}\n\n.bg-primary > .card-header .btn-tool,\n.bg-gradient-primary > .card-header .btn-tool,\n.card-primary:not(.card-outline) > .card-header .btn-tool {\n  color: rgba(255, 255, 255, 0.8);\n}\n\n.bg-primary > .card-header .btn-tool:hover,\n.bg-gradient-primary > .card-header .btn-tool:hover,\n.card-primary:not(.card-outline) > .card-header .btn-tool:hover...

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