Problem

What is CORE_TINY_INSTANCES environment variable and what is its usage?

Resolution

 In Integrator 3.6.0 a new memory handler for dataTree is used as default. This memory handler uses a file on disk as memory swap, the page file. The amount of RAM memory allocated for the data instances (meta data is not included) is thereby limited to the size of the memory cache.

This variable forces the dataTree module to run fully in memory, not using the file system. This is MUCH faster ONLY when customers are using especially lots of SMALL messages.

If you are using larger files (but a smaller number), this variable will show little to no improvement.

In order to use the old dataTree memory handler an environment variable must be set:
CORE_TINY_INSTANCES=true