Adobe
Experience Manager 6.x either crashes or is slow during a large asset upload.
Heap dump analysis shows that the CQBufferedImageCache is
consuming a quarter or more of the heap.
Solution:
Why issue occurs:
- The default maximum cache size for CQBufferedImageCache
is set to a quarter of the JVM heap size.
- To illustrate the problem, let's say you have a system
with a max heap (-Xmx param) of 5 GB, an Oak BlobCache set at 1 GB, and
Document cache set at 2 GB.
- In this case, the buffered cache would take max
1.25 GB and that would leave only 0.75-GB memory for unexpected spikes.
- Eventually, the JVM fails with OutOfMemoryErrors. To
solve the problem, reduce the configured max size of the buffered image
cache.
- When uploading large amounts of assets to Adobe
Experience Manager, tune the buffered cache size by configuring it via the
OSGi Web Console.
Solution:
- Go
to
http://host:port/system/console/configMgr/com.day.cq.dam.core.impl.cache.CQBufferedImageCache
- Set
the property cq.dam.image.cache.max.memory in bytes for
example, 1073741824 is 1 GB (1024*1024*1024 = 1 GB).
