How to solve the problem that the CPU surges to 100% when imagick is running in multiple threads-php手册-php.cn

How to solve the problem that the CPU surges to 100% when imagick is running in multiple threads

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Release： 2016-07-06 13:30:51

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If you install imagic to the /usr/local/imagemagick directory, first use the /usr/local/imagemagick/bin/convert -version command to check whether the output content has multi-threading enabled. The value of Features: is empty or DPC Description It is single-threaded. If the value of Features: is openMP, it means it is multi-threaded. The multi-threaded mode of imagick has a bu

If you install imagic to the /usr/local/imagemagick directory

First use the /usr/local/imagemagick/bin/convert -version command to check whether the output content has multi-threading enabled. The value of Features: is empty or DPC Description It is single-threaded. If the value of Features: is openMP, it means it is multi-threaded. There is a bug in the multi-threaded mode of imagick, which will cause the multi-core CPU usage to instantly surge to 100%. So be sure to use its single-threaded mode. That’s it.

The above is the result displayed when my configuration is correct. If the configuration is not correct, the result below will be displayed

Features: openMP

The first result is single-threaded mode, and the second result is multi-threaded mode. Because the multi-threaded mode of imagick has a bug, so if you first installed imagick in multi-threaded mode, you must yum remove imagemagick Just uninstall it and reinstall it.

Just add the red font part below during installation ./configure --PRefix=/usr/local/imagemagick

--disable-openmp