posix_getrlimit

    (PHP 4, PHP 5, PHP 7, PHP 8)

    posix_getrlimit — Return info about system resource limits

    Опис

    posix_getrlimit(?int $resource = null): array|false

    posix_getrlimit() returns an array of information about the current resource's soft and hard limits.

    З кожним процесом пов'язані м'які та жорсткі межі його ресурсів. М'яка межа — ефективний розмір ресурсу. Жорстка межа — це значення, до якого процес може збільшити ефективний розмір ресурсу. Непривілейований процес може змінювати свої м'які межі, але жорсткі межі — лише зменшувати.

    Параметри

    resource

    If null all resource limits will be fetched. Otherwise, the only limits of the resource type provided will be returned.

    Значення, що повертаються

    Returns an associative array of elements for each limit that is defined. Each limit has a soft and a hard limit.

    List of possible limits returned
    Limit name Limit description
    core The maximum size of the core file. When 0, not core files are created. When core files are larger than this size, they will be truncated at this size.
    totalmem The maximum size of the memory of the process, in bytes.
    virtualmem The maximum size of the virtual memory for the process, in bytes.
    data The maximum size of the data segment for the process, in bytes.
    stack The maximum size of the process stack, in bytes.
    rss The maximum number of virtual pages resident in RAM
    maxproc The maximum number of processes that can be created for the real user ID of the calling process.
    memlock The maximum number of bytes of memory that may be locked into RAM.
    cpu The amount of time the process is allowed to use the CPU.
    filesize The maximum size of the data segment for the process, in bytes.
    openfiles One more than the maximum number of open file descriptors.
    The function returns false on failure.

    Журнал змін

    Версія Опис
    8.3.0 The optional resource parameter has been added.

    Приклади

    Приклад #1 Example use of posix_getrlimit()

    <?php

    $limits     = posix_getrlimit();

    print_r($limits);
    ?>

    Поданий вище приклад виведе щось схоже на:

    Array
(
    [soft core] => 0
    [hard core] => unlimited
    [soft data] => unlimited
    [hard data] => unlimited
    [soft stack] => 8388608
    [hard stack] => unlimited
    [soft totalmem] => unlimited
    [hard totalmem] => unlimited
    [soft rss] => unlimited
    [hard rss] => unlimited
    [soft maxproc] => unlimited
    [hard maxproc] => unlimited
    [soft memlock] => unlimited
    [hard memlock] => unlimited
    [soft cpu] => unlimited
    [hard cpu] => unlimited
    [soft filesize] => unlimited
    [hard filesize] => unlimited
    [soft openfiles] => 1024
    [hard openfiles] => 1024
)

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    User Contributed Notes 1 note

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    petert at tebault dot org
    24 years ago
    The array returned (on a RH6.2 box) is:
    soft core = 0
    hard core = unlimited
    soft data = unlimited
    hard data = unlimited
    soft stack = 8388608
    hard stack = unlimited
    soft totalmem = unlimited
    hard totalmem = unlimited
    soft rss = unlimited
    hard rss = unlimited
    soft maxproc = 2048
    hard maxproc = 2048
    soft memlock = unlimited
    hard memlock = unlimited
    soft cpu = unlimited
    hard cpu = unlimited
    soft filesize = unlimited
    hard filesize = unlimited
    soft openfiles = 1024
    hard openfiles = 1024
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