# Tutorial - Guía del Usuario { #tutorial-user-guide }

Este tutorial te muestra cómo usar **FastAPI** con la mayoría de sus funcionalidades, paso a paso.

Cada sección se basa gradualmente en las anteriores, pero está estructurada para separar temas, de manera que puedas ir directamente a cualquier sección específica para resolver tus necesidades específicas de API.

Você também pode usar `from starlette.middleware.cors import CORSMiddleware`.

**FastAPI** fornece vários middlewares em `fastapi.middleware` apenas como uma conveniência para você, o desenvolvedor. Mas a maioria dos middlewares disponíveis vêm diretamente da Starlette.

现在仍然是对的。

因此，为了能够同时拥有**多个进程**，必须有一个**单个进程侦听端口**，然后以某种方式将通信传输到每个工作进程。

### 每个进程的内存 { #memory-per-process }

现在，当程序将内容加载到内存中时，例如，将机器学习模型加载到变量中，或者将大文件的内容加载到变量中，所有这些都会消耗服务器的一点内存 (RAM) 。

多个进程通常**不共享任何内存**。 这意味着每个正在运行的进程都有自己的东西、变量和内存。 如果您的代码消耗了大量内存，**每个进程**将消耗等量的内存。

### 服务器内存 { #server-memory }

       * If we make some other optimizations, this one will no longer be necessary. The optimization
       * could actually hurt in some cases, as it forces us to keep all inputs in memory until the
       * final input completes.
       */
      @RetainedLocalRef
      ImmutableCollection<? extends ListenableFuture<? extends InputT>> localFutures = futures;

     * <p>This method returns all duplicate host configurations in the system,
     * ordered by sort order, regular name, and duplicate hostname. The results
     * are limited by the configured maximum fetch size to prevent memory issues.</p>
     *
     * @return a list of all DuplicateHost entities
     */
    public List<DuplicateHost> getDuplicateHostList() {

        return duplicateHostBhv.selectList(cb -> {

        // Check for common stats fields (these may need to be adjusted based on actual implementation)
        // Examples of fields that might be present:
        // - Document count
        // - Index size
        // - Memory usage
        // - System stats
        // etc.

        for (Map.Entry<String, Object> entry : res.entrySet()) {
            logger.info("Stats field: {} = {}", entry.getKey(), entry.getValue());
        }

            assertEquals(runtimeException, exception.getCause());
        });

        // Test with error
        Error error = new OutOfMemoryError("Out of memory");
        assertDoesNotThrow(() -> {
            RuntimeCIFSException exception = new RuntimeCIFSException(error);
            assertEquals(error, exception.getCause());
        });
    }

    @Test

    private AutoCloseable mocks;

    @BeforeEach
    public void setUp() throws Exception {
        mocks = MockitoAnnotations.openMocks(this);

        // Set up mock provider to return TCP memory regions
        when(mockProvider.registerMemory(any(ByteBuffer.class), any())).thenAnswer(invocation -> {
            ByteBuffer buffer = invocation.getArgument(0);
            EnumSet<RdmaAccess> access = invocation.getArgument(1);

limitations under the License.
==============================================================================*/
#include "tensorflow/c/eager/gradients.h"

#include <memory>

#include "absl/container/flat_hash_set.h"
#include "absl/types/span.h"
#include "tensorflow/c/eager/abstract_context.h"
#include "tensorflow/c/eager/abstract_tensor_handle.h"

limitations under the License.
==============================================================================*/
#ifndef TENSORFLOW_C_EAGER_ABSTRACT_OPERATION_H_
#define TENSORFLOW_C_EAGER_ABSTRACT_OPERATION_H_

#include <memory>

#include "absl/types/span.h"
#include "tensorflow/c/eager/abstract_tensor_handle.h"
#include "tensorflow/c/tensor_interface.h"
#include "tensorflow/core/framework/tensor_shape.h"