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Re: php daemon

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Jerry Stuckle wrote:
> I thought of something else you may be misunderstanding.  This is NOT
> the amount of memory allocated to PHP by the OS.  That is in multiples
> of 4K blocks (for Intel architecture).  It is the amount actually
> allocated for use by PHP.  Once that figure reaches the maximum memory
> defined in the php.ini file, no more memory can be allocated by the script.

I'm aware of the $real_usage parameter of memory_get_usage() and the
different results reported according to the value of this parameter.
And I assume, that the following invariant holds:

    memory_get_usage(true) >= memory_get_usage(false)

> Your interpretation would provide pretty worthless information as it
> would not give a true account of memory being used.

Isn't the true amount of memory being used by PHP (independent on how
much is allocated by the OS) the relevant information for the given test?

However, reading
<http://www.php.net/manual/en/features.gc.collecting-cycles.php> and
<https://wiki.php.net/internals/zend_mm> still let's me assume, that
zvals which refcount drops to zero are immediately freed (/not
necessarily given back to the OS, though/).  The following test
/supports/ my assumption (it's no prove, though):

for ($i = 0; $i < 99; $i++) {
    for ($j = 0; $j < 10000; $j++) {
        $a = uniqid();
    }
    echo memory_get_usage(true), "\n";
}

Even if 990,000 uniqid()s (having 13 bytes each) will be allocated, on
my PHP 5.4.7 on Windows XP the output are 99 lines with 262144,
independent of the setting of zend.enable_gc.

-- 
Christoph M. Becker

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Thread

php daemon "sl@exabyte" <sb5309@hotmail.com> - 2012-11-12 01:18 +0800
  Re: php daemon Jerry Stuckle <jstucklex@attglobal.net> - 2012-11-11 14:04 -0500
    Re: php daemon Christoph Becker <cmbecker69@gmx.de> - 2012-11-11 21:05 +0100
      Re: php daemon Jerry Stuckle <jstucklex@attglobal.net> - 2012-11-11 15:35 -0500
        Re: php daemon Christoph Becker <cmbecker69@gmx.de> - 2012-11-11 22:22 +0100
          Re: php daemon Jerry Stuckle <jstucklex@attglobal.net> - 2012-11-11 16:36 -0500
            Re: php daemon Christoph Becker <cmbecker69@gmx.de> - 2012-11-11 23:17 +0100
              Re: php daemon Jerry Stuckle <jstucklex@attglobal.net> - 2012-11-11 18:11 -0500
                Re: php daemon Christoph Becker <cmbecker69@gmx.de> - 2012-11-12 14:35 +0100
                Re: php daemon Jerry Stuckle <jstucklex@attglobal.net> - 2012-11-12 08:38 -0500
                Re: php daemon Jerry Stuckle <jstucklex@attglobal.net> - 2012-11-13 07:44 -0500
                Re: php daemon Christoph Becker <cmbecker69@gmx.de> - 2012-11-14 21:19 +0100
                Re: php daemon Jerry Stuckle <jstucklex@attglobal.net> - 2012-11-14 16:33 -0500
                Re: php daemon Christoph Becker <cmbecker69@gmx.de> - 2012-11-14 23:13 +0100
                Re: php daemon Jerry Stuckle <jstucklex@attglobal.net> - 2012-11-15 07:41 -0500
                Re: php daemon Christoph Becker <cmbecker69@gmx.de> - 2012-11-15 16:55 +0100
    Re: php daemon "sl@exabyte" <sb5309@hotmail.com> - 2012-11-12 23:45 +0800
      Re: php daemon The Natural Philosopher <tnp@invalid.invalid> - 2012-11-12 16:08 +0000
  Re: php daemon Goran <goran@nospam.com> - 2012-11-13 08:57 +0100
    Re: php daemon Jerry Stuckle <jstucklex@attglobal.net> - 2012-11-13 07:47 -0500
      Re: php daemon Goran <goran@nospam.com> - 2012-11-13 14:54 +0100
        Re: php daemon The Natural Philosopher <tnp@invalid.invalid> - 2012-11-13 14:13 +0000
        Re: php daemon Jerry Stuckle <jstucklex@attglobal.net> - 2012-11-13 12:23 -0500
          Re: php daemon Goran <goran@nospam.com> - 2012-11-14 08:43 +0100
            Re: php daemon Jerry Stuckle <jstucklex@attglobal.net> - 2012-11-14 05:51 -0500
              Re: php daemon Goran <goran@nospam.com> - 2012-11-15 14:08 +0100
                Re: php daemon Jerry Stuckle <jstucklex@attglobal.net> - 2012-11-15 08:46 -0500
                Re: php daemon Goran <goran@nospam.com> - 2012-11-15 16:09 +0100
                Re: php daemon Jerry Stuckle <jstucklex@attglobal.net> - 2012-11-15 11:25 -0500
                Re: php daemon Tim Streater <timstreater@greenbee.net> - 2012-11-15 16:20 +0000

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