imagemagick - 无法使用 ImageMagick 限制内存使用量

Question

我正在使用命令 [1] 配置 ImageMagick 以生成 PSD 缩略图。它非常适用于小尺寸 PSD，但在处理 2GB PSD 时，服务器 CPU 和内存使用量将在几分钟内不断增加到 100%，直到进程被服务器终止。

CPU 和内存利用率无法由 /etc/ImageMagick/policy.xml[2] 中的配置控制。发生这种情况时还附上了 ImageMagick 日志[3]。

服务器：CentOS 6.9，8核CPU，32G内存，500G磁盘

[1] 转换 one-page.psd -flatten -thumbnail 1280x1280 thumbnail.jpeg

[2]

<policymap>
  <policy domain="resource" name="temporary-path" value="/data01/imagemagick-tmp"/>
  <policy domain="resource" name="memory" value="2GiB"/>
  <policy domain="resource" name="map" value="4GiB"/>
  <policy domain="resource" name="disk" value="50GiB"/>
  <policy domain="resource" name="thread" value="1"/>
  <policy domain="resource" name="throttle" value="5"/>
</policymap>

[3]

<event>2019-03-20T18:25:37+08:00 3:45.830 14.550u 7.0.8 Cache convert[1944]: cache.c/ClonePixelCacheRepository/842/Cache
  Memory => Memory</event>
  <event>2019-03-20T18:25:37+08:00 3:45.830 14.550u 7.0.8 Resource convert[1944]: resource.c/RelinquishMagickResource/1069/Resource
  Memory: 70224B/1.33725GiB/2GiB</event>
  <event>2019-03-20T18:25:37+08:00 3:45.830 14.550u 7.0.8 Cache convert[1944]: cache.c/OpenPixelCache/3778/Cache
  open One-page.psd[0] (Heap Memory, 418x14x4 93632B)</event>
  <event>2019-03-20T18:25:37+08:00 3:45.830 14.550u 7.0.8 Coder convert[1944]: psd.c/ReadPSDLayer/1493/Coder
      reading data for channel 1</event>
  <event>2019-03-20T18:25:37+08:00 3:45.830 14.550u 7.0.8 Coder convert[1944]: psd.c/ReadPSDChannelRLE/1158/Coder
        layer data is RLE compressed</event>
  <event>2019-03-20T18:25:37+08:00 3:45.830 14.550u 7.0.8 Coder convert[1944]: psd.c/ReadPSDLayer/1493/Coder
      reading data for channel 2</event>
  <event>2019-03-20T18:25:37+08:00 3:45.830 14.550u 7.0.8 Coder convert[1944]: psd.c/ReadPSDChannelRLE/1158/Coder
        layer data is RLE compressed</event>
  <event>2019-03-20T18:25:37+08:00 3:45.830 14.550u 7.0.8 Coder convert[1944]: psd.c/ReadPSDLayer/1493/Coder
      reading data for channel 3</event>
  <event>2019-03-20T18:25:37+08:00 3:45.830 14.550u 7.0.8 Coder convert[1944]: psd.c/ReadPSDChannelRLE/1158/Coder
        layer data is RLE compressed</event>
  <event>2019-03-20T18:25:37+08:00 3:45.840 14.550u 7.0.8 Coder convert[1944]: psd.c/ApplyPSDLayerOpacity/393/Coder
    applying layer opacity 22873</event>
  <event>2019-03-20T18:25:37+08:00 3:45.840 14.550u 7.0.8 Coder convert[1944]: psd.c/ReadPSDImage/2374/Coder
    reading the precombined layer</event>
  <event>2019-03-20T18:25:37+08:00 3:45.840 14.550u 7.0.8 Coder convert[1944]: psd.c/ReadPSDChannelRLE/1158/Coder
        layer data is RLE compressed</event>
  <event>2019-03-20T18:25:39+08:00 3:47.980 14.660u 7.0.8 Coder convert[1944]: psd.c/ReadPSDChannelRLE/1158/Coder
        layer data is RLE compressed</event>
  <event>2019-03-20T18:25:41+08:00 3:50.100 14.770u 7.0.8 Coder convert[1944]: psd.c/ReadPSDChannelRLE/1158/Coder
        layer data is RLE compressed</event>

标签： imagemagick