# Cómo hacer - Recetas { #how-to-recipes }

Aquí verás diferentes recetas o guías de "cómo hacer" para **varios temas**.

La mayoría de estas ideas serían más o menos **independientes**, y en la mayoría de los casos solo deberías estudiarlas si aplican directamente a **tu proyecto**.

Si algo parece interesante y útil para tu proyecto, adelante y revísalo, pero de lo contrario, probablemente puedas simplemente omitirlas.

/// tip | Consejo

    }

    /**
     * Get total number of memory regions allocated
     *
     * @return memory region count
     */
    public long getMemoryRegionsAllocated() {
        return memoryRegionsAllocated.get();
    }

    /**
     * Get number of currently active memory regions
     *
     * @return active memory region count
     */
    public long getMemoryRegionsActive() {

import java.util.Date;
import java.util.Map;
import java.util.Objects;

/**
 * Utility class for memory operations and size calculations.
 */
public final class MemoryUtil {
    private MemoryUtil() {
    }

    /**
     * Gets a formatted memory usage log string.
     *
     * @return formatted memory usage information
     */
    public static String getMemoryUsageLog() {

import org.apache.maven.api.model.Model;
import org.apache.maven.model.v4.MavenStaxReader;

/**
 * A utility class that analyzes Maven POM files to identify memory usage patterns and potential memory optimizations.
 * This analyzer focuses on identifying duplicate strings and their memory impact across different paths in the POM structure.
 *

    /**
     * Get request type
     *
     * @return type of request
     */
    public RequestType getType() {
        return type;
    }

    /**
     * Get associated memory region
     *
     * @return memory region for this request
     */
    public RdmaMemoryRegion getMemoryRegion() {
        return memoryRegion;
    }

    /**
     * Check if request is completed
     *

packaging.env.file=

# Default configuration directory and file to use in bin/plugin script

# Default values for min/max heap memory allocated to fess java process
packaging.fess.heap.min=256m
packaging.fess.heap.max=1g

# Specifies the maximum file descriptor number
packaging.os.max.open.files=65535

# Maximum number of VMA (Virtual Memory Areas) a process can own
packaging.os.max.map.count=262144

        this.remainingBytes = remainingBytes;
    }

    /**
     * Add RDMA channel information for direct memory access
     *
     * @param remoteKey remote memory key
     * @param address remote memory address
     * @param length length of memory region
     */
    public void addRdmaChannelInfo(int remoteKey, long address, int length) {

net.core.busy_read=50
net.core.busy_poll=50
kernel.numa_balancing=1

# Do not use swap at all
vm.swappiness=0
vm.vfs_cache_pressure=50

# Start writeback at 3% memory
vm.dirty_background_ratio=3
# Force writeback at 10% memory
vm.dirty_ratio=10

# Quite a few memory map
# areas may be consumed
vm.max_map_count=524288

# Default is 500000 = 0.5ms
kernel.sched_migration_cost_ns=5000000

# stalled hdd io threads

- **`CurlException`**: Unchecked RuntimeException for HTTP errors.

### I/O Layer

- **`ContentCache`**: In-memory or file-based caching. Implements `Closeable` and auto-deletes file cache on close.

- **`ContentOutputStream`**: Extends `DeferredFileOutputStream`. Writes to memory until threshold (default 1MB) exceeded, then spills to temp file.

## Technical Details

- **Java Version**: 17+

   * value slightly too high than slightly too low. If the value is not exact, the {@link
   * ImmutableDoubleArray} that is built will very likely occupy more memory than strictly
   * necessary; to trim memory usage, build using {@code builder.build().trimmed()}.
   */
  public static Builder builder(int initialCapacity) {
    checkArgument(initialCapacity >= 0, "Invalid initialCapacity: %s", initialCapacity);