Imagick::setResourceLimit()

(PECL imagick 2.0.0)

Sets the limit for a particular resource

说明

Imagick::setResourceLimit(int $type,int $limit): bool

This method is used to modify the resource limits of the underlying ImageMagick library.

参数

$type: Refer to the list of resourcetype constants.
$limit: One of the resourcetype constants. The unit depends on the type of the resource being limited.

返回值

成功时返回TRUE。

参见

Imagick::getResourceLimit() Returns the specified resource limit

This list should help setting the limits:
imagick::RESOURCETYPE_AREA (integer)  //equivalent of MAGICK_AREA_LIMIT
imagick::RESOURCETYPE_DISK (integer)  //equivalent of MAGICK_DISK_LIMIT
imagick::RESOURCETYPE_FILE (integer)  //equivalent of MAGICK_FILE_LIMIT
imagick::RESOURCETYPE_MAP (integer)  //equivalent of MAGICK_MAP_LIMIT
imagick::RESOURCETYPE_MEMORY (integer) //equivalent of MAGICK_MEMORY_LIMIT

IMagick::RESOURCETYPE_THREADS is missing, yet you're still able to limit the number of thready ImageMagick should use:
<?php
// IMagick::setResourceLimit(IMagick::RESOURCETYPE_THREADS, 2);
IMagick::setResourceLimit(6, 2);

Note that the limits are given in bytes instead of megabytes. You can verify with:
<?php echo Imagick::getResourceLimit(Imagick::RESOURCETYPE_MEMORY); ?>