• 首页
  • vue
  • TypeScript
  • JavaScript
  • scss
  • css3
  • html5
  • php
  • MySQL
  • redis
  • jQuery
  • posix_getrlimit()

    (PHP 4, PHP 5, PHP 7)

    Return info about system resource limits

    说明

    posix_getrlimit(void): array

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

    Each resource has an associated soft and hard limit. The soft limit is the value that the kernel enforces for the corresponding resource. The hard limit acts as a ceiling for the soft limit. An unprivileged process may only set its soft limit to a value from 0 to the hard limit, and irreversibly lower its hard limit.

    返回值

    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 nameLimit 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.

    范例

    Example use of posix_getrlimit()

    <?php
    $limits = posix_getrlimit();
    print_r($limits);
    ?>
    

    以上例程的输出类似于:

    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
    )
    

    参见

    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

    上篇:posix_getpwuid()

    下篇:posix_getsid()