Because the CIB data is stored in XML, it is typically very bulky and highly compressible.
The compression_threshold directive tells Heartbeat at what size to begin compression of data. Compression can actually increase the size of small data items. This directive tells how big a CIB (in kbytes) should be the smallest subject to compression.
The general syntax of a compression_threshold directive is:
A sample compression_threshold directive is shown below