Hello,
A soft memory limit could be very useful; it doesn't necessarily need to throw
an error, but it would provide an opportunity to free some memory and prevent
the script from crashing. Perhaps something like:
// function to call when memory is running out
register_memory_limit_handler('freeSomeMemory');
function freeSomeMemory() {
$GLOBALS['someBigCache'] = null;
}
regards,
Peter
--- Richard Lynch <[EMAIL PROTECTED]> wrote:
> You might also come at it from the other direction and detect/notify
> at some number smaller than the current hard limit, configurable in
> php.ini...
>
> This might play better with anything relying on the current behaviour.
>
> On Mon, April 16, 2007 5:19 am, David Sklar wrote:
> > I am interested in being able to trap the (currently) fatal error that
> > results when memory usage exceeds the defined memory limit.
> >
> > I was thinking it could work as follows:
> >
> > - in addition to a memory_limit configuration directive, there could
> > be a "memory_limit_grace" configuration directive. This gets stored in
> > the struct _zend_mm_heap, along with the limit.
> >
> > - Also added to struct _zend_mm_heap is a "initial limit reached" flag
> >
> > - When zend_mm_safe_error() in Zend/zend_alloc.c is invoked under the
> > current conditions (memory_limit exceeded), it sets the "initial limit
> > reached" flag, adjusts the heap limit to the "memory_limit_grace"
> > value and throws some non-fatal error (or an exception if it is
> > feasible from here.)
> >
> > - When zend_mm_safe_error() is invoked and the "initial limit reached"
> > flag is already set, it throws the fatal error exactly as it does now.
> >
> > This "grace period" would provide a way to gracefully exit when a
> > memory limit is reached, but also has the hard limit still enforced so
> > that code which is supposed to be gracefully exiting doesn't chew up
> > too much additional memory.
> >
> > Is it feasible to adjust the heap limit and throw a non-fatal error
> > from within zend_mm_safe_error()?
> >
> > David
> >
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> >
>
>
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